# Compare Microsoft 365 vs Thunderbird 2026 | Capterra

> Unsure of what to choose? Check Capterra to compare Microsoft 365 and Thunderbird based on pricing, features, product details, and verified reviews.

Source: https://www.capterra.com/compare/227157-230507/Microsoft-365-vs-Thunderbird

---

# Microsoft 365 vs Thunderbird Features and Cost Comparison

Last updated March 15th, 2026

Provider data verified by our Software Research team, and reviews  
moderated by our Reviews Verification team.[Learn more](https://www.capterra.com/our-story/)

Your comparison:

Microsoft 365Thunderbird2/4 selected

[Microsoft 365](https://www.capterra.com/p/227157/Microsoft-365/)[4.6 (14,071)](https://www.capterra.com/p/227157/Microsoft-365/reviews/)

[Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.4 (159)](https://www.capterra.com/p/230507/Thunderbird/reviews/)

[## Microsoft 365](https://www.capterra.com/p/227157/Microsoft-365/)[4.6 (14,071)](https://www.capterra.com/p/227157/Microsoft-365/reviews/)

Starting Price

$6.00/month

Value-for-Money

4.3

Functionality

4.6

Ease of Use

4.5

Customer Service

4.3

Reviews Sentiment

Based on [14,071 reviews](#user-reviews)

Positive

13,413

Neutral

528

Negative

130

[## Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.4 (159)](https://www.capterra.com/p/230507/Thunderbird/reviews/)

Starting Price

Contact vendor

Value-for-Money

4.7

Functionality

4.3

Ease of Use

4.4

Customer Service

3.7

Reviews Sentiment

Based on [159 reviews](#user-reviews)

Positive

138

Neutral

17

Negative

4

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## Send this comparison chart to my inbox

### Fill out the form and we'll send a list of the top-rated software based on real user reviews directly to your inbox.

## Summary

* * *

Key features rated by users

Features selected based on 11,865 reviews from email management software users.  
about the Fit Score methodology.

Fit Score methodology

Our Fit Score reflects how reviewers rate a product’s performance against a set of features reviewers rate as most important. A higher score indicates the product is rated better in delivering what reviewers most care about.

  

If the Fit Score is not shown for a specific product, that only means there are currently not enough relevant data points to develop a meaningful score. It does not indicate that the product should be excluded from further evaluation. Best for Methodology

\--%Fit

Missing features

Not enough reviews

Feature ratings

Mobile App

\--

Email Distribution

NA

Inbox Management

4.5

Email Monitoring

4.5

Access Controls/Permissions

NA

\--%Fit

Missing features

Feature ratings

Mobile App

5.0

Email Distribution

NA

Inbox Management

4.5

Email Monitoring

NA

Access Controls/Permissions

NA

User satisfaction

User satisfaction

4.6

User reviews[14,071](https://www.capterra.com/p/227157/Microsoft-365/reviews/)

Ease of use

4.5

Functionality

4.6

Value for money

4.3

Customer support

4.3

User satisfaction

4.4

User reviews[159](https://www.capterra.com/p/230507/Thunderbird/reviews/)

Ease of use

4.4

Functionality

4.3

Value for money

4.7

Customer support

3.7

Price starts from

Price starts from

$6Per User, Per Month

-   Free version
-   Free trial

Price starts from

\--

-   Free version
-   Free trial

Best for

Best for

Microsoft 365 is used by families, students, home users, professionals, remote workers, content creators, and enterprise organizations.

Best for

Not provided by vendor

## User reviews

Pros & cons

VR

Verified Reviewer

Lead Project Manager

> "It has every tool you need for data processing, spreadsheet and document management, cloud storage, PowerPoint for presentations, email & team communication, video conferencing, antivirus..."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7116236)

JD

Joshua D.

IT Support Engineer

> "For larger busineses, subscription costs can get quite expensive and not many options for alternatives means businesses are often stuck with using O365 and prone to many poor decisions,..."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7048554)

Sven S.

Director

> "I especially value the seamless integration between Word, Excel, PowerPoint, Outlook, Teams, and OneDrive, because it allows me to move between tasks without interruption."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7133323)

JN

Jon N.

Technology Director

> "Some setup can be unnecessarily complex particularly around some important services like security, device management etc but I guess it has to cover a wide range of businesses that are..."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7048280)

VR

Verified Reviewer

Software Developer

> "Microsoft 365 office suite integrates well into the SharePoint platform as opening modifying files such as documents, sheets and power bi files are easily done and update real-time."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7113002)

EM

Edward M.

General Manager

> "Some of the web and mobile functionality of the key Microsoft applications such as Word and Excel, do not offer as much of the robust formatting capabilities as their desktop installed..."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___6810233)

Troy C.

Owner

> "I can easily generate links with specific permissions (view-only, edit access, or password protection) for both internal colleagues and external clients, ensuring data stays safe while..."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7077118)

CB

Christine B.

Marketing Manager

> "There can also be some overlap between tools (like Teams, SharePoint, and OneDrive), which can make it unclear where files should live or how to best organize collaboration."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7138705)

VR

Verified Reviewer

Owner

> "Using Outlook for managing emails, Word for writing proposals, and Excel for tracking expenses allows me to keep everything organized within one ecosystem."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7133060)

VR

Verified Reviewer

Leasing Consultant

> "What I like least about Microsoft 365 is how limited the access can be, especially because it's a paid software so it tends to get very pricey and sometimes formats converted to other..."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7102255)

Troy C.

Owner

> "It automatically converts legacy files (like old .doc formats) to modern standards and allows for easy export to PDF and other formats directly within the apps, saving me from using..."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7077118)

FM

Flavio M.

Senior QA Analyst

> "Also variations between desktop, web and Mac can sometimes be a a pain in terms of how to find where the features are if you are used to have it in one Operational System most of the time."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7110667)

CQ

Connor Q.

IT Team Lead

> "bringing together the traditional MS Office suite with newer inclusions of Teams, Onedrive and related services allows document work, emails, IM chats and meetings to all sit comfortably..."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7133046)

TW

Tabatha W.

Nurse Supervisor

> "It can also be frustrating when there are syncing issues or slight delays with cloud-based files, particularly in Teams or OneDrive."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7136333)

MW

Melinda W.

Owner

> "Its all-in-one productivity suite and seamless collaboration—tools like Word, Excel, Outlook, and Teams work together smoothly, making it easy to create, share, and collaborate in real..."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7142134)

Lauren F.

Legal Secretary

> "Ie, when I use LEAP and load a word or excel document, this can be the main reason that my computer crashes."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7117283)

AG

Adrian G.

Building Operator

> "It provides a reliable and structured environment where communication, document management, and data analysis all work together seamlessly."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7124076)

VR

Verified Reviewer

Lead Project Manager

> "The downside is that if you only use a fraction of the features or tools, it becomes unnecessarily expensive, and you might be better off purchasing each product separately."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7116236)

MD

Maggie D.

Office Manager

> "Outlook, Teams, and SharePoint all work together smoothly, so scheduling interviews, storing documents, and communicating with the team is easy."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7052733)

Sven S.

Director

> "One drawback is that Microsoft 365 can feel a little complex at first, especially for users who only need basic office functions."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7133323)

Troy C.

Owner

> "The subscription model offers excellent ROI by bundling industry-standard apps (Word, Excel, PowerPoint) with robust cloud services."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7077118)

NC

Nick C.

Videographer

> "Sometimes there are connection issues that prevent me from using basic apps like Microsoft Word which can be frustrating."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7044210)

VR

Verified Reviewer

Territory Account Executive

> "Ms 365 has made our team more productive and efficient since we can all utilise the apps we need on our day to day basis in one platform."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7043702)

MH

Moss H.

Graphic Designer

> "I use Powerpoint the most, so losing access to some of its features is the main downside to the cloud software format."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7087920)

CG

Carly G.

Curriculum Designer and Trainer

> "Its free accounts or trial is very limited to show what M365 can do. But with a paid account, document management, file sharing, and just all the tools and applications available are..."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7050996)

Fernando S.

IT Support, CRM architect

> "Outlook is a good example of what Microsoft needs to do (create a new Outlook from scratch), but using the wrong way (removing useful features)."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7105265)

JN

Jon N.

Technology Director

> "It has an excellent suite of products that covers the majority of business needs all bundled into one price that is difficult to be for the amount of tools you get included."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7048280)

KM

Kaitlin M.

Freelance Content Strategist

> "Microsoft 365 subscriptions charge for the same service that was available with Google Docs for free, which means not a lot of my clients and colleagues use Microsoft 365, making using it..."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___6603623)

ST

Shayne T.

Co owner

> "Being able to open a document on your laptop, make a few edits on your phone, and see your teammate’s changes appear instantly feels effortless."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7120685)

DN

David N.

IT Operations Manager

> "Admin portal (m365 and Intune portal) can be slow and sometimes the blades either don't open or open up blank."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7128000)

Troy C.

Owner

> "It eliminates the need for expensive on-premises hardware and ensures I always have access to the latest feature updates without extra upgrade costs."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7077118)

DN

David N.

IT Operations Manager

> "There are way too many "admin portals" to manage everything within the M365 organization."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7128000)

VR

Verified Reviewer

Project and IT Manager

> "I appreciate all the efforts Microsoft put into connecting tools with each other, and the way SharePoint serves as an overarching platform for file share and documentation."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7065840)

Sven S.

Director

> "The subscription model also means ongoing costs, which may be a concern for smaller businesses or individual users."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7133323)

EM

Edward M.

General Manager

> "The integrated nature of this software, online accessbility, and user functionality in being able to quickly and easily share documents, spreadsheets and presentations is top notch."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___6810233)

AC

Andrew C.

Inspection and Training Manager

> "My only concern with this package is the ongoing cost, where most basic functions are available you have to some times pay a premium to access wider functions."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___6851495)

RE

Rizi E.

Technical Specialist

> "Its cloud-first approach and integration across tools make it ideal for modern work environments, though administrative complexity and cost can be challenging."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7055719)

LM

Lauren M.

Treatment coordinator

> "Additionally, occasional syncing delays or integration hiccups—especially between desktop and cloud versions—can disrupt workflow if not managed carefully."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___6827071)

OT

Oualid T.

Agent Commercial

> "I have found Excel and Word within Microsoft 365 to be working smoothly across many locations and permissions control in SharePoint helps me sleep when managing sensitive documents..."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___6815735)

Nicholas D.

Project Manager

> "I don't love the browser-based version, as I prefer Desktop applications, as I find they are more feature rich."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7106304)

VR

Verified Reviewer

Project and IT Manager

> "I am happy with what M365 offers and I am looking forward to seeing Copilot’s integration with M365 apps growing, but would like to see some long-term bugs being fixed and to provide..."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7065840)

SS

Sandeep S.

Principal

> "Sometimes I have turnover in my company and I have to delete and start employee email accounts. "

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7130129)

CB

Christine B.

Marketing Manager

> "The platform keeps communication organized while maintaining a consistent, user-friendly experience across all tools, which makes day-to-day work more efficient."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7138705)

CY

Chun Y.

Office Manager

> "Frequent updates sometimes change layouts or behaviour, interrupting workflows."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7084730)

SB

Scott B.

Network Engineer

> "Great product for email hosting, document storge and sharing, Teams chatting, word processing, all Microsoft products"

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___6813144)

MF

Michal F.

Financial Advisor

> "If reference sheets are connected in several files and the main file is renamed or moved, the links can be broken."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___6830665)

ZN

Zalman N.

Operations Manager at MCA Track and GoACH

> "The seamless integration between Outlook, Teams, SharePoint, and Excel makes internal communication and document sharing straightforward."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7057171)

OB

Oluwatobi B.

Graduate Teaching Assistant

> "I do not like the occasional glitches and bugs and the lag in performance sometimes. But for the most part, it is efficient."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7095882)

VR

Verified Reviewer

Territory Account Executive

> "This is a perfect platform and it can be used by any team in any organisation since it fits perfectly with almost every use case, with a few exceptions, but it’s a perfect tool for most..."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7043702)

JR

Janessa R.

Product Marketing Manger

> "Copilot downloadable desktop application is glitchy, constantly needs to be refreshed or forces the PC to be rebooted."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___6842688)

AC

Angel C.

QC

> "Not only that it provides excellent for communication and collaboration ideal for remote work, vendor communication and inspection follow ups."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7114864)

CC

Connor C.

Data Analyst

> "If you need to get into an account that is locked, they make it almost impossible to do so."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7113703)

DS

Danielle S.

Owner

> "On the positive side, it stands out for its seamless integration of tools which are all accessible across devices through the cloud."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7122537)

VR

Verified Reviewer

Teaching Assistant

> "It's also hard to find where keyboard shortcuts are, and I often need to search for it."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7056603)

JS

Juan S.

Senior Consultant

> "Email management is forward-looking, document workflows are automated, and file sharing through OneDrive and SharePoint keeps everyone in line."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___6877116)

CM

Corey M.

Senior Systems Engineer

> "Mixed, while we use the office suite with frequency it also seems each year they make things worse especially with regards to the user interface, it gets more complicated and obfuscated..."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7020753)

AS

Abhi S.

Dispatcher

> "Overall, its a good tool for a person to be updated all the time with recent happenings in office and provide social networking tools to enhance communication."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7126673)

NA

Nasywa A.

Student

> "The main drawback I’ve experienced is the subscription cost, which can be a burden for students if they don’t have access through their university."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___6842912)

AT

Anna T.

Credentialing Specialist

> "I like the multiple programs it offers like Notes and Teams, to make sure we’re all in the same page and we can make sure everyone has the same information"

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___6843717)

PW

Pamela W.

Community Programs Specialist

> "It updates the view and it can be confusing for me to navigate as I don't understand what all the options are or where the functions are of what I need."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___6861334)

YK

Yurii K.

Technical Support Specialist

> "The biggest pro for me is ease of use - if you are a regular user that uses a Windows Home version or if you are an enterprise company with thousands of users, MS 365 is the best choice..."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7123242)

CR

Catriona R.

Managing Director

> "The UIX is pretty pitiful and they are constantly changing the names of features which can be confusing. As I know someone who works at microsoft, I think this is likely a silo effect of..."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7030558)

TW

Taylor W.

Human Resource Coordinator

> "It is a very versatile platform as it integrates multiple applications to complete a wide array of tasks."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7117408)

VO

Vincent O.

Owner

> "I dislike the fact that it has morphed into a yearly subscription when ther are no significant improvements each year."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7055477)

Samantha E.

Agent

> "The ability to integrate ezlynx and teams with all the access of 365 has made work easier and sharing and communication more streamlined"

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7037392)

Michael O.

Actor

> "It doesn't play well with others - difficult to import info from non-Microsoft products."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7067956)

CC

Connor C.

Data Analyst

> "I like most products of Microsoft office, they give you good value for your money, but only if you dive deep to utilize all functions that come with the service."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7113703)

VR

Verified Reviewer

VP of Finance and Operations

> "We switched to get away from managing individual Microsoft licenses, which had become a real headache."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7112149)

OR

Oliver R.

Senior Designer

> "Overall it’s an essential part of my day to day, with clients sharing word documents with content or PowerPoint presentations etc."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7076800)

YK

Yurii K.

Technical Support Specialist

> "Microsoft is a bit shady about MS 365 right now trying to include Copilot for a higher price."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7123242)

DS

Danielle S.

Owner

> "The user-friendly interface, along with advanced capabilities, making it a versatile option for both personal and professional use."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7122537)

JC

Joseph C.

Operations Manager

> "Have had multiple instnaces of doces reverting to earlier versions so we just lose files. If we could autosave to our own network drive I assume this would not happen because it does not..."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___6678751)

Sven S.

Director

> "Microsoft 365 offers an excellent combination of familiar applications, strong collaboration features, and reliable cloud access."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7133323)

VR

Verified Reviewer

HR Assistant

> "Syncing and live collaboration require an internet connection which can make it hard when you are on the go."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___6873301)

VR

Verified Reviewer

executive

> "I love Microsoft 365’s seamless integration, cloud access, real-time collaboration, and advanced security, which boosts productivity and flexibility across all devices and platforms."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___6752724)

JM

Jasmine M.

Operations Analyst

> "I dont like that in order to add a calendar invite, I have to open the invite as an email and then save it to add it to my calendar."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___6413859)

PS

Pereira S.

Informatics Engineer

> "Microsoft 365 has impressive security and backup features that eliminates the risk of losing documents, enable us to share files securely , detect breaches and prevent unauthorized access..."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___6471949)

MS

Morgan S.

PTA

> "The removal of Publisher, the document formatting in Word (or lack thereof), the frequent inefficient updates, Microsoft Teams, the cost."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___6493613)

SJ

Sheryl J.

Field Estimator

> "My most utilized tool is Excel, keeping all my data organized & calculated to generate accurate projections / charts to share with my colleagues."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___6667901)

MW

Melinda W.

Owner

> "The biggest downside is the cost and subscription model—it can get expensive over time."

[See full review](https://www.capterra.com/p/227157/Microsoft-365/#Capterra___7142134)

[View Reviews](https://www.capterra.com/p/227157/Microsoft-365/reviews/)

Leandro A.

Developer

> "I use it as my main email client , both for personal use and for work , it feels comfortable .Big plus that they don't spam you"

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___7054778)

SA

Sara A.

Engineer

> "The settings interface is a bit confusing; in the future 365 email accounts may have issues to works as Thunderbird does not..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6357971)

SP

Stuart P.

Product Manager

> "I was using another free email client that would not let me use different ports for incoming and outgoing mail so when searching..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6880981)

JMV

Jose Miguel V.

Adjunct Professor

> "Aesthetics and UI: For me, this is a big problem. While this is subjective, and the interface can be customized, when you open..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4842912)

Leandro A.

Developer

> "Also is open source and doesn't spam you"

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___7054778)

RK

Robert K.

drafting

> "some extensions have bugs like send later"

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6737417)

JMV

Jose Miguel V.

Adjunct Professor

> "Right now I am using Thunderbird for all my personal emails, and the client has all you need to manage successfully all your..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4842912)

JF

Jamie F.

Lead Technician

> "I always when trying to select the top email accidentally click the column header and re-order the emails which is annoying,..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___5093745)

MK

Matt K.

Consultant

> "Even when I've had ten or more email addresses to manage for different clients, it's been up to the job and easy to use."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6463718)

SA

Sara A.

Engineer

> "I don't like very much the menu, especially the settings section."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6357971)

Sunny K.

Marketing Manager

> "Additionally, it facilitates the management of multiple email inboxes in a single, convenient location, which can be quite..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#GetApp___6048711)

Brendan B.

Coach

> "I have had certain performance issues that I could not explain or fix."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6799859)

Brendan B.

Coach

> "Free, open, power, highly customizable email client."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6799859)

VR

Verified Reviewer

Operations Analyst

> "Lack of Cloud Integration: Thunderbird does not offer cloud integration, which may limit its usefulness for users who need to..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4565113)

JM

Juan M.

SEO supervisor

> "The intuitive user interface makes navigation a breeze, and the seamless integration with my existing email accounts was a huge..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4981089)

UA

Ubed A.

Verification expert

> "However, some users may find Thunderbird's user interface outdated compared to other modern email clients, and it may not..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4616069)

DK

Dev K.

Design Engineer

> "This is a best-of-class, open source and Free Software desktop email client that works very well with all necessary email..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6130553)

VR

Verified Reviewer

Operations Analyst

> "Limited Mobile Support: Thunderbird does not have a dedicated mobile app, which may make it difficult for users to access their..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4565113)

JMV

Jose Miguel V.

Adjunct Professor

> "Another great addition of the last years was the "Smart folders," making your multiple account inbox easier to visit and search."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4842912)

VR

Verified Reviewer

Operations Analyst

> "Limited Customer Support: Thunderbird is an open-source project, which means that customer support is limited and users may have..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4565113)

Sunny K.

Marketing Manager

> "I have set up multiple accounts in Thunderbird, making it convenient for me to receive emails in one place."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#GetApp___6048711)

VR

Verified Reviewer

Operations Analyst

> "Complex User Interface: Some users may find Thunderbird's user interface to be complex and difficult to navigate, especially if..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4565113)

UA

Ubed A.

Verification expert

> "Security and privacy: Thunderbird includes features such as encryption, phishing protection, and spam filtering that enhance..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4616069)

JMV

Jose Miguel V.

Adjunct Professor

> "This one was my first problem after I switch from Microsoft Outlook."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4842912)

VR

Verified Reviewer

Operations Analyst

> "Customizable: Thunderbird Mail is highly customizable, allowing users to personalize their email experience by choosing from a..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4565113)

VR

Verified Reviewer

DAM Expert

> "No support per email or phone."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___5001917)

MK

Matt K.

Consultant

> "It's been my go-to desktop email client for twenty years."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6463718)

MT

Monica T.

Project Manager

> "Sometimes when there are a lot of emails coming in it gets stuck, and from time to time I need to delete some of the emails."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3808513)

DM

Davide M.

Indie Game Developer

> "I've benn using Thunderbird for several years and have had an overall positive experience with the software. While there are..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___5081958)

JD

Jacob D.

Executive

> "Namely, half the time when you repond, the reply won't be shown automatically inline (for at least several minutes)."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3513931)

NP

Nicolas P.

IT Manager

> "Very simple to use but could be configurated to have lots of stuff"

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6805419)

UA

Ubed A.

Verification expert

> "Lack of support: Thunderbird is maintained by a small community of developers, so users may not receive prompt support or..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4616069)

Austin M.

Software Analyst

> "I think the most impactful thing about Thunderbird is the community that uses the software, making it evolve constantly and..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___5079584)

Robert M.

Freelancer

> "I do not know why they have separated outgoing server settings in another section from the account setting."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3763863)

AR

Ari R.

CEO

> "nice interface;- calendar built in (very well thought out);- tabs for better viewing;- mail and calendar pane in one single..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4153313)

Robert M.

Freelancer

> "The search and filter are not very functional, and I could not find my desired result from it."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3763863)

UA

Ubed A.

Verification expert

> "Additionally, Thunderbird's ability to manage multiple email accounts from different providers, including POP, IMAP, and..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4616069)

VR

Verified Reviewer

Operations Analyst

> "However, some users may find the user interface to be complex and the performance to be slow on older computers."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4565113)

VR

Verified Reviewer

Consultant / developer

> "Thunderbird is full of features, customizable with addons and themeable."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4842831)

DS

David S.

Tech Acct MGR

> "Setting up Microsoft exchange inside of Thunderbird is difficult if you do not know what you're doing there really is no work..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3834541)

UA

Ubed A.

Verification expert

> "Thunderbird offers a wide range of add-ons and extensions that allow users to customize the program according to their needs."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4616069)

VR

Verified Reviewer

CEO

> "The calendar and all the addons can't compete with Google or other alternatives."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4580663)

Sunny K.

Marketing Manager

> "It accommodates various mail types and allows for easy configuration."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#GetApp___6048711)

Gonzalo M.

Managing Director

> "Integrates less well into Windows than some alternatives."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3712769)

UA

Ubed A.

Verification expert

> "Its free and open-source software status and cross-platform support also make it a popular choice for users across different..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4616069)

TB

Tanya B.

Technician

> "One thing i particullarly hated was the fact that the program was crashing on me from time to time."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4620389)

Hugo G.

Software developer and support

> "Overall pleased but I'll like to see it improved"

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6805669)

JD

Jacob D.

Executive

> "However, this add-on comes with its own bunch of issues."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3513931)

JM

Juan M.

SEO supervisor

> "Thunderbird has truly revolutionized the way I manage my inbox, and I couldn't be more impressed."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4981089)

Gustavo B.

Director

> "It does not offer any cloud based system that might allow the software to be used away from where it was installed and..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3484995)

Mohamed E.

Customer Success Specialist

> "I receive all the important emails on this software, it saves a lot of time and gets me notified of any available vacancies."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4635676)

James C.

Sales and Marketing

> "Sometimes I had difficulty and slowness to do more specific searches, using keywords that were in the body of the email."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3444626)

VR

Verified Reviewer

DAM Expert

> "Of course, I like that it is open-source and free of costs. And I like Thunderbird Filelink."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___5001917)

JD

Jacob D.

Executive

> "Thunderbird, from my experience, is incredibly slow and buggy."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3513931)

JM

Juan M.

SEO supervisor

> "From the moment I started using Thunderbird, it was evident that this tool was designed with productivity in mind."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4981089)

AR

Ari R.

CEO

> "RAM memory is another con that I'd point out."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4153313)

SS

Shashi S.

Student

> "It has fewer features than outlook but as a University student, the software works fine for me because I don't need all those..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4473755)

Robert M.

Freelancer

> "Maybe it is my mistake, So at least it is not user-friendly enough to learn and work with."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3763863)

UA

Ubed A.

Verification expert

> "Overall, Mozilla Thunderbird is a popular email client that provides a range of features and customization options."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4616069)

DP

Darian P.

Team Lead of Internal Tools

> "We don't use the calendar functionality because it constantly would not work for our users."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3021391)

GS

Grant S.

Head of Sales

> "All the features but leaner, more stable & faster."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6165374)

VR

Verified Reviewer

Senior system engineer

> "Most generic features are commercialized which will tend other users to use different mail clients"

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3431281)

JMV

Jose Miguel V.

Adjunct Professor

> "Since I have been using Thunderbird, I never regret my switch from Outlook."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4842912)

SP

Santosh P.

Digital Marketer

> "Iwas needing cloud access to mails and my webmail was not cutting it."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3198853)

SP

Shane P.

Security system engineer

> "I like the fact that Thunderbird was free and worked for the most part."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6008627)

AL

Ad L.

Director

> "It has a rather childish menu bar layout in black and white."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3024426)

Petter K.

Parish Manager

> "I think the main thing I can say that I like about Thunderbird is that it is free."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___6193707)

Bill B.

President

> "Another issue I have is with the built-in calendar. "

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3258266)

ML

Mark L.

Owner

> "A great way to use an email system that is very low cost and has the features and benfits you will need for many small business..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3639522)

SP

Shawn P.

Owner

> "The UI is incredibly outdated."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3394046)

Stanley M.

System Administrator

> "I love the new modern look that ships with Thunderbird and the support for dark theme."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4169265)

James C.

Sales and Marketing

> "I've had problems with the manager simply stopping working and having to restart."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3444626)

VR

Verified Reviewer

Senior system engineer

> "I think if you want to sync your gmail,hotmail, yahoo mail with your local client, Thunderbird is one such mail client which..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3431281)

AL

Ad L.

Director

> "The opening of tabs is something i personally do not like."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3024426)

JJ

Jeet J.

Founder & CEO

> "Moreover, it also supports adding SMTP mail which is really helpful."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4053362)

Teya B.

Teacher: Digital Illustration

> "I find the interface very, very dated."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3150330)

AR

Ari R.

CEO

> "I was delighted to start using this app when a coworker recommended it to me because I'd been trying to find something that was..."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___4153313)

AL

Ad L.

Director

> "Don't like the visual."

[See full review](https://www.capterra.com/p/230507/Thunderbird/#Capterra___3024426)

[View Reviews](https://www.capterra.com/p/230507/Thunderbird/reviews/)

## User interface

[Microsoft 365](https://www.capterra.com/p/227157/Microsoft-365/)

4.65 (14,071)

[Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)

4.41 (159)

### Features

Do these products fit your needs?

Prioritize real-user-identified key features according to your needs to find your best fit.

\--% Fit

vs

\--% Fit

Access Controls/Permissions

207

Important

Activity Dashboard

150

Important

AI Copilot

120

Important

Microsoft 365

Top features

14/47

-   Access Controls/Permissions
-   Activity Dashboard
-   AI Copilot
-   Alerts/Notifications
-   API
-   Archiving & Retention
-   Autoresponders
-   Campaign Analytics
-   Campaign Management
-   Canned Responses
-   Chat/Messaging
-   Collaboration Tools
-   Contact Management
-   Customer Segmentation
-   Customizable Fields
-   Customizable Forms
-   Customizable Templates
-   Data Recovery
-   Drag & Drop
-   Email Distribution
-   Email Marketing
-   Email Monitoring
-   Email Templates
-   Email Tracking
-   Generative AI
-   Inbox Management
-   Mobile App
-   Multiple User Accounts
-   Prioritization
-   Process/Workflow Automation
-   Queue Management
-   Real-Time Analytics
-   Real-Time Monitoring
-   Real-Time Reporting
-   Reporting/Analytics
-   Response Management
-   Routing
-   Search/Filter
-   Shared Inboxes
-   Signature Management
-   Social Media Integration
-   Spam Blocker
-   Support Ticket Management
-   Tagging
-   Third-Party Integrations
-   Whitelisting/Blacklisting
-   Workflow Management

[See all features](https://www.capterra.com/p/227157/Microsoft-365/#features)

Thunderbird

12/47

-   Access Controls/Permissions
-   Activity Dashboard
-   AI Copilot
-   Alerts/Notifications
-   API
-   Archiving & Retention
-   Autoresponders
-   Campaign Analytics
-   Campaign Management
-   Canned Responses
-   Chat/Messaging
-   Collaboration Tools
-   Contact Management
-   Customer Segmentation
-   Customizable Fields
-   Customizable Forms
-   Customizable Templates
-   Data Recovery
-   Drag & Drop
-   Email Distribution
-   Email Marketing
-   Email Monitoring
-   Email Templates
-   Email Tracking
-   Generative AI
-   Inbox Management
-   Mobile App
-   Multiple User Accounts
-   Prioritization
-   Process/Workflow Automation
-   Queue Management
-   Real-Time Analytics
-   Real-Time Monitoring
-   Real-Time Reporting
-   Reporting/Analytics
-   Response Management
-   Routing
-   Search/Filter
-   Shared Inboxes
-   Signature Management
-   Social Media Integration
-   Spam Blocker
-   Support Ticket Management
-   Tagging
-   Third-Party Integrations
-   Whitelisting/Blacklisting
-   Workflow Management

[See all features](https://www.capterra.com/p/230507/Thunderbird/#features)

### Recognition

Microsoft 365 is recognized as a top-rated tool in 1 Capterra Shortlist reports

Thunderbird is recognized as a top-rated tool in 3 Capterra Shortlist reports

Best Value Email ManagementSoftware (2026) 

### Deployment & support

Microsoft 365

Deployment

-   Cloud, SaaS, Web-Based
-   Desktop Mac
-   Desktop Windows
-   Desktop Linux
-   On-Premise Windows
-   On-Premise Linux
-   Desktop Chromebook
-   Mobile Android
-   Mobile iPhone
-   Mobile iPad

Support

-   Email/Help Desk
-   FAQs/Forum
-   Knowledge Base
-   Phone Support
-   24/7 (Live rep)
-   Chat

Training

-   In Person
-   Live Online
-   Webinars
-   Documentation
-   Videos

Thunderbird

Deployment

-   Cloud, SaaS, Web-Based
-   Desktop Mac
-   Desktop Windows
-   Desktop Linux
-   On-Premise Windows
-   On-Premise Linux
-   Desktop Chromebook
-   Mobile Android
-   Mobile iPhone
-   Mobile iPad

Support

-   Email/Help Desk
-   FAQs/Forum
-   Knowledge Base
-   Phone Support
-   24/7 (Live rep)
-   Chat

Training

-   In Person
-   Live Online
-   Webinars
-   Documentation
-   Videos

### Company Details

Microsoft 365

-   By Microsoft
-   Located in United States
-   Founded in 1975

Thunderbird

-   By Mozilla
-   Located in United States
-   Founded in

## Popular Comparisons

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vs

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[Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.41 (159)](https://www.capterra.com/p/230507/Thunderbird/reviews/)

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4.4

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[Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.41 (159)](https://www.capterra.com/p/230507/Thunderbird/reviews/)

vs

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$0

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Contact vendor for pricing

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4.4

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vs

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[Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.41 (159)](https://www.capterra.com/p/230507/Thunderbird/reviews/)

vs

[Yahoo Mail](https://www.capterra.com/p/266980/Yahoo-Mail/)[4.23 (850)](https://www.capterra.com/p/266980/Yahoo-Mail/reviews/)

$0

Price

Contact vendor for pricing

4.3

Features

4.1

4.4

Ease of Use

4.4

[View full comparison](https://www.capterra.com/compare/230507-266980/Thunderbird-vs-Yahoo-Mail)

[Microsoft 365](https://www.capterra.com/p/227157/Microsoft-365/)[4.65 (14,071)](https://www.capterra.com/p/227157/Microsoft-365/reviews/)

vs

[Microsoft SharePoint](https://www.capterra.com/p/1167/SharePoint/)[4.35 (5,430)](https://www.capterra.com/p/1167/SharePoint/reviews/)

$6/month

Price

$5/month

4.6

Features

4.3

4.5

Ease of Use

4.1

[View full comparison](https://www.capterra.com/compare/1167-227157/SharePoint-vs-Microsoft-365)

[Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.41 (159)](https://www.capterra.com/p/230507/Thunderbird/reviews/)

vs

[Mailchimp](https://www.capterra.com/p/110228/MailChimp/)[4.48 (17,599)](https://www.capterra.com/p/110228/MailChimp/reviews/)

$0

Price

$13/month

4.3

Features

4.4

4.4

Ease of Use

4.4

[View full comparison](https://www.capterra.com/compare/110228-230507/MailChimp-vs-Thunderbird)

[Microsoft 365](https://www.capterra.com/p/227157/Microsoft-365/)[4.65 (14,071)](https://www.capterra.com/p/227157/Microsoft-365/reviews/)

vs

[Dropbox Business](https://www.capterra.com/p/143068/Dropbox-Business/)[4.53 (21,687)](https://www.capterra.com/p/143068/Dropbox-Business/reviews/)

$6/month

Price

$11.99/month

4.6

Features

4.4

4.5

Ease of Use

4.5

[View full comparison](https://www.capterra.com/compare/143068-227157/Dropbox-Business-vs-Microsoft-365)

[Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.41 (159)](https://www.capterra.com/p/230507/Thunderbird/reviews/)

vs

[Brevo](https://www.capterra.com/p/132996/brevo/)[4.62 (3,439)](https://www.capterra.com/p/132996/brevo/reviews/)

$0

Price

$9/month

4.3

Features

4.5

4.4

Ease of Use

4.6

[View full comparison](https://www.capterra.com/compare/132996-230507/brevo-vs-Thunderbird)