# Compare eM Client vs Thunderbird 2026 | Capterra

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

Source: https://www.capterra.com/compare/160239-230507/eM-Client-vs-Thunderbird

---

# eM Client vs Thunderbird Features and Cost Comparison

Last updated June 3rd, 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:

eM ClientThunderbird2/4 selected

[eM Client](https://www.capterra.com/p/160239/eM-Client/)[4.2 (188)](https://www.capterra.com/p/160239/eM-Client/reviews/)

[Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.4 (160)](https://www.capterra.com/p/230507/Thunderbird/reviews/)

[## eM Client](https://www.capterra.com/p/160239/eM-Client/)[4.2 (188)](https://www.capterra.com/p/160239/eM-Client/reviews/)

Starting Price

€34.95one time

Value-for-Money

4.1

Functionality

4.1

Ease of Use

4.3

Customer Service

3.7

Reviews Sentiment

Based on [188 reviews](#user-reviews)

Positive

153

Neutral

22

Negative

13

[## Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.4 (160)](https://www.capterra.com/p/230507/Thunderbird/reviews/)

Starting Price

Contact vendor

Value-for-Money

4.7

Functionality

4.3

Ease of Use

4.3

Customer Service

3.7

Reviews Sentiment

Based on [160 reviews](#user-reviews)

Positive

138

Neutral

18

Negative

4

## Not a match? Find software alternatives tailored to your priorities.

These software suggestions are similar to those you’re currently comparing.

Highest Rated

### LiveAgent

4.7 (1,786)

* * *

Starting Price

$15.00

Per User,Per Month

Free Trial

Free Version

* * *

User rating

97%

of reviewers  
rated it above 4 stars

* * *

### Connecteam

4.6 (5,298)

* * *

Starting Price

$29.00

Flat Rate,Per Month

Free Trial

Free Version

* * *

User rating

96%

of reviewers  
rated it above 4 stars

* * *

### Asana

4.5 (13,604)

* * *

Starting Price

$10.99

Per User,Per Month

Free Trial

Free Version

* * *

User rating

92%

of reviewers  
rated it above 4 stars

* * *

### Constant Contact

4.3 (2,934)

* * *

Starting Price

$12.00

Usage Based,Per Month

Free Trial

Free Version

* * *

User rating

86%

of reviewers  
rated it above 4 stars

* * *

## 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 12,154 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

61%Fit

Missing features

Feature ratings

Mobile App

NA

Email Distribution

4.2

Inbox Management

4.6

Email Monitoring

4.3

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

4.2

User reviews[188](https://www.capterra.com/p/160239/eM-Client/reviews/)

Ease of use

4.3

Functionality

4.1

Value for money

4.1

Customer support

3.7

User satisfaction

4.4

User reviews[160](https://www.capterra.com/p/230507/Thunderbird/reviews/)

Ease of use

4.3

Functionality

4.3

Value for money

4.7

Customer support

3.7

Price starts from

Price starts from

€34.95Flat Rate, One Time

-   Free version
-   Free trial

Price starts from

\--

-   Free version
-   Free trial

Best for

Best for

Designed for professionals and businesses of all sizes, this email, calendar, contacts, notes and task desktop program offers also online meetings support, instant translation of emails, and more.

Best for

Not provided by vendor

## User reviews

Pros & cons

SP

Stuart P.

Product Manager

> "It was pretty straightforward getting my email account working to send and receive emails using this app."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___7069536)

TL

Tom L.

sales and marketing manager

> "I had been using microsoft outlook for years and after multuple corrupt data files and having to manage multiple..."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___7167471)

OM

Oliver M.

Journalist

> "Fun to learn for professionals used to more limited Gmail but not as visually seamless although newer updates are very..."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___6443811)

SH

Shauna H.

AP

> "I would have to uninstall the app and then redownload it sometimes."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___6853684)

IZ

Ignacio Z.

Software Engineer

> "I can have an up to date mailbox with very low downtime between the mail getting received on the original mail..."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___4470454)

DG

Daniel G.

CEO

> "Besides the calendaring system synch, it does not work well with the new Gmail task system and doesn't support..."

[See full review](https://www.capterra.com/p/160239/eM-Client/#SoftwareAdvice___6202240)

MR

Mark R.

Owner

> "I have found eMClient easy to setup and migrate over to from other platforms and on behalf of my clients after I have..."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___4988545)

RS

Riccardo S.

Translator

> "The text editor is very basic, certain features are a bit clunky"

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___6431461)

MR

Mark R.

Owner

> "The user interface is simple yet very effective and fully customisable. "

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___4988545)

FA

Fabruzio A.

Technician

> "Sometimes it a bit slow while loading; I am not sure if local email managed with eM Client will be easy exportable to..."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___6308683)

SA

Sara A.

Engineer

> "I use Emclient on a couple of computers and I am really satisfied."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___6317407)

DG

Daniel G.

CEO

> "There isn't even a way of getting paid support. "

[See full review](https://www.capterra.com/p/160239/eM-Client/#SoftwareAdvice___6202240)

FA

Fabruzio A.

Technician

> "I will surely install it on other computers."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___6308683)

JH

Jacob H.

Sales Manager

> "Customer support were rude and closed the support ticket to a paying customer without our consent and without..."

[See full review](https://www.capterra.com/p/160239/eM-Client/#SoftwareAdvice___4629835)

RE

Ronald E.

Contributor

> "Feature-rich, supports all major email accounts, has integrated calendar"

[See full review](https://www.capterra.com/p/160239/eM-Client/#GetApp___4774623)

RE

Ronald E.

Contributor

> "Does not do that and when I suggested it to customer support they didn't even acknowledge the request and simply said..."

[See full review](https://www.capterra.com/p/160239/eM-Client/#GetApp___4774623)

RE

Ronald E.

Contributor

> "Still, I think the client is fantastic enough that I would want to purchase it, that is, until I got to their..."

[See full review](https://www.capterra.com/p/160239/eM-Client/#GetApp___4774623)

PW

Paul W.

Owner

> "I don't want to have my email stored on the external servers, I want local copies (leaving them on the server as well..."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___3596486)

DS

Danker S.

Advisor

> "Working with eM Client is easy, setting it up to my own preferences is good. If you have the pro version, you can have..."

[See full review](https://www.capterra.com/p/160239/eM-Client/#GetApp___3511494)

RE

Ronald E.

Contributor

> "There are too many steps with templates that you have to go through to set up a simple mail filter."

[See full review](https://www.capterra.com/p/160239/eM-Client/#GetApp___4774623)

VR

Verified Reviewer

Director

> "It's a great app, until you lose all of your emails and settings."

[See full review](https://www.capterra.com/p/160239/eM-Client/#GetApp___4852266)

SC

Sandra C.

Director of Nursing

> "I worry that the malfunctions I experienced were isolated incidents or due to some outside factor such as our..."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___3910509)

CS

Charlie S.

Systems Administrator

> "eM Client makes managing my Gmail much, MUCH easier and I love the theming and aesthetic of the software."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___2958530)

Barry C.

Senior Partner, Advisory

> "The emClient product's export capability is effectively non-existent. If a later decision is made to return-to/go-to..."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___4136840)

AB

Alison B.

Copywriter

> "Able to keep up to date through email and calendar with clients which makes my life easier."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___3596227)

VR

Verified Reviewer

Director

> "I've contacted eM Client's customer support several times about this, but they refuse to do anything about it."

[See full review](https://www.capterra.com/p/160239/eM-Client/#GetApp___4852266)

Harsh M.

Senior systems engineer

> "Easy navigation, better features as compared to other mail clients, professional version available for business needs."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___3393268)

SC

Sandra C.

Director of Nursing

> "Performance and reliability were inconsistent."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___3910509)

PC

Patrick C.

Pres CEO

> "Importing my data from MS Outlook was so easy I didn't actually realize that it happened except for the prompts to let..."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___3596220)

DB

David B.

retired

> "Email not containing search request yields emails not containing requested terms."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___3596222)

SK

Steven K.

CPA

> "eM Client is very easy to use, and it allows me to be able to view all of my old emails, without the need to search..."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___3596155)

TB

Tim B.

General Manager

> "Hard to figure out how to remove names associated with emails that have changed to different people."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___3596092)

VR

Verified Reviewer

Cheif Officer

> "The built in calendar in the sidebar is a nice easy to use feature that makes looking at my day at a glance very easy."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___3351473)

VR

Verified Reviewer

Cheif Officer

> "There is a limit of three email accounts for free, which then gets quite expensive."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___3351473)

MH

Mark H.

owner

> "Fantastic integration with Google calendar and contacts"

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___3595981)

MA

Mark A.

VP

> "The response was even more baffling. If you buy two licenses 'at the same time' there is a deep discount. But if..."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___2408704)

MH

Mark H.

owner

> "It has been a reliable and solid product that integrates flawlessly with Google services."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___3595981)

AoEUL

Ali of Express Union L.

Manager

> "One morning one of the computers stopped downloading the emails."

[See full review](https://www.capterra.com/p/160239/eM-Client/#GetApp___3479755)

CS

Charlie S.

Systems Administrator

> "The PGP setup during the process of adding an account is a huge bonus."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___2958530)

RL

Rose L.

CEO

> "BIG bug - it started to cancel calendar appointments and events - it attempted to cancel them all over 3 years. "

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___2788025)

AR

Ade R.

Operation Manager

> "Simple to setup, intuitive and good feature set."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___4525361)

Matt W.

President

> "Locks up my computer ALL THE TIME when processing new e-mail in any of my half dozen or so accounts."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___2500782)

SC

Sandra C.

Director of Nursing

> "Support experience went well."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___3910509)

VR

Verified Reviewer

Founder

> "Also the pricing was a bit strange. If I bought 1 license for a 1-time price, why I wouldn't get future upgrades?"

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___2590909)

CB

Christophe B.

Research assistant

> "The software is free, and offers many functions and tools."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___3611691)

MD

Mike D.

ceo

> "Tried out their suggestion ( I had to buy a new license to be able to follow their suggestion ), and it still didn't..."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___2590035)

AB

Alison B.

Copywriter

> "The email syncs perfectly and I never miss messages."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___3596227)

Matt W.

President

> "I never could get the signatures and templating to work correctly."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___2500782)

VR

Verified Reviewer

Cheif Officer

> "It makes checking email and understanding it a breeze."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___3351473)

MD

Mike D.

ceo

> "After notifying them that the issue persists, still waiting for 3 weeks with no reply."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___2590035)

VR

Verified Reviewer

Head of IT

> "Email client is a very interesting email client, reliable and a excellent alternative to Outlook."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___3596671)

TD

Tony D.

Marketing Mgr.

> "No other software that I use causes loss of data except emclient."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___2697207)

VR

Verified Reviewer

Head of IT

> "Easy integration with Gmail."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___3596671)

TD

Tony D.

Marketing Mgr.

> "Database design poorly written and administered."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___2697207)

CS

Charlie S.

Systems Administrator

> "It's easy to use but the feature set is robust."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___2958530)

RL

Rose L.

CEO

> "Only way to stop it was to force-quit and uninstall."

[See full review](https://www.capterra.com/p/160239/eM-Client/#Capterra___2788025)

[View Reviews](https://www.capterra.com/p/160239/eM-Client/reviews/)

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)

RK

Robert K.

drafting

> "some extensions have bugs like send later"

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

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)

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)

Leandro A.

Developer

> "Also is open source and doesn'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)

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)

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)

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)

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)

Brendan B.

Coach

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

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

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)

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)

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)

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)

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

> "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)

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)

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)

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)

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)

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)

VR

Verified Reviewer

DAM Expert

> "No support per email or phone."

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

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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

> "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)

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)

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)

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)

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)

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)

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)

VR

Verified Reviewer

Senior systems 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)

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)

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)

Shawn P.

Cheif Officer

> "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

Consultant / developer

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

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

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)

VR

Verified Reviewer

Senior systems 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)

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)

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)

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)

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)

Teya B.

Teacher: Digital Illustration

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

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

DS

David S.

Tech Acct MGR

> "I use it everyday among other email clients and it is a good free sourced email platform."

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

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

[eM Client](https://www.capterra.com/p/160239/eM-Client/)

4.16 (188)

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

4.40 (160)

### 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

eM Client

Top features

20/47

-   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
-   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 Automation
-   Workflow Management

[See all features](https://www.capterra.com/p/160239/eM-Client/#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
-   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 Automation
-   Workflow Management

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

### Recognition

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

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

Best Value Email ManagementSoftware (2026) 

### Deployment & support

eM Client

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

eM Client

-   By eM Client
-   Located in Czechia
-   Founded in 2006

Thunderbird

-   By Mozilla
-   Located in United States
-   Founded in

## Popular Comparisons

[eM Client](https://www.capterra.com/p/160239/eM-Client/)[4.16 (188)](https://www.capterra.com/p/160239/eM-Client/reviews/)

vs

[Google Workspace](https://www.capterra.com/p/247901/Google-Workspace/)[4.70 (17,618)](https://www.capterra.com/p/247901/Google-Workspace/reviews/)

€34.95one time

Price

$7/month

4.1

Features

4.6

4.3

Ease of Use

4.6

[View full comparison](https://www.capterra.com/compare/160239-247901/eM-Client-vs-Google-Workspace)

[Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.40 (160)](https://www.capterra.com/p/230507/Thunderbird/reviews/)

vs

[Gmail](https://www.capterra.com/p/202338/Gmail/)[4.81 (13,477)](https://www.capterra.com/p/202338/Gmail/reviews/)

$0

Price

$0

4.3

Features

4.7

4.3

Ease of Use

4.8

[View full comparison](https://www.capterra.com/compare/202338-230507/Gmail-vs-Thunderbird)

[eM Client](https://www.capterra.com/p/160239/eM-Client/)[4.16 (188)](https://www.capterra.com/p/160239/eM-Client/reviews/)

vs

[Microsoft 365](https://www.capterra.com/p/227157/Microsoft-365/)[4.65 (14,116)](https://www.capterra.com/p/227157/Microsoft-365/reviews/)

€34.95one time

Price

$6/month

4.1

Features

4.6

4.3

Ease of Use

4.5

[View full comparison](https://www.capterra.com/compare/160239-227157/eM-Client-vs-Microsoft-365)

[Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.40 (160)](https://www.capterra.com/p/230507/Thunderbird/reviews/)

vs

[Google Workspace](https://www.capterra.com/p/247901/Google-Workspace/)[4.70 (17,618)](https://www.capterra.com/p/247901/Google-Workspace/reviews/)

$0

Price

$7/month

4.3

Features

4.6

4.3

Ease of Use

4.6

[View full comparison](https://www.capterra.com/compare/230507-247901/Thunderbird-vs-Google-Workspace)

[eM Client](https://www.capterra.com/p/160239/eM-Client/)[4.16 (188)](https://www.capterra.com/p/160239/eM-Client/reviews/)

vs

[Wrike](https://www.capterra.com/p/76113/Wrike/)[4.37 (3,023)](https://www.capterra.com/p/76113/Wrike/reviews/)

€34.95one time

Price

$10/month

4.1

Features

4.3

4.3

Ease of Use

4.2

[View full comparison](https://www.capterra.com/compare/76113-160239/Wrike-vs-eM-Client)

[Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.40 (160)](https://www.capterra.com/p/230507/Thunderbird/reviews/)

vs

[Microsoft Outlook](https://www.capterra.com/p/227138/Microsoft-Outlook/)[4.54 (2,481)](https://www.capterra.com/p/227138/Microsoft-Outlook/reviews/)

$0

Price

Contact vendor for pricing

4.3

Features

4.5

4.3

Ease of Use

4.5

[View full comparison](https://www.capterra.com/compare/227138-230507/Microsoft-Outlook-vs-Thunderbird)

[eM Client](https://www.capterra.com/p/160239/eM-Client/)[4.16 (188)](https://www.capterra.com/p/160239/eM-Client/reviews/)

vs

[Titan Email](https://www.capterra.com/p/195493/Titan-Email/)[4.47 (128)](https://www.capterra.com/p/195493/Titan-Email/reviews/)

€34.95one time

Price

$1.49/month

4.1

Features

4.3

4.3

Ease of Use

4.6

[View full comparison](https://www.capterra.com/compare/160239-195493/eM-Client-vs-Titan-Email)

[Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.40 (160)](https://www.capterra.com/p/230507/Thunderbird/reviews/)

vs

[Microsoft 365](https://www.capterra.com/p/227157/Microsoft-365/)[4.65 (14,116)](https://www.capterra.com/p/227157/Microsoft-365/reviews/)

$0

Price

$6/month

4.3

Features

4.6

4.3

Ease of Use

4.5

[View full comparison](https://www.capterra.com/compare/227157-230507/Microsoft-365-vs-Thunderbird)

[Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.40 (160)](https://www.capterra.com/p/230507/Thunderbird/reviews/)

vs

[Yahoo Mail](https://www.capterra.com/p/266980/Yahoo-Mail/)[4.22 (858)](https://www.capterra.com/p/266980/Yahoo-Mail/reviews/)

$0

Price

Contact vendor for pricing

4.3

Features

4.1

4.3

Ease of Use

4.4

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

[Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.40 (160)](https://www.capterra.com/p/230507/Thunderbird/reviews/)

vs

[Mailchimp](https://www.capterra.com/p/110228/MailChimp/)[4.48 (17,643)](https://www.capterra.com/p/110228/MailChimp/reviews/)

$0

Price

$13/month

4.3

Features

4.4

4.3

Ease of Use

4.4

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

[Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.40 (160)](https://www.capterra.com/p/230507/Thunderbird/reviews/)

vs

[Brevo](https://www.capterra.com/p/132996/brevo/)[4.62 (3,489)](https://www.capterra.com/p/132996/brevo/reviews/)

$0

Price

$9/month

4.3

Features

4.5

4.3

Ease of Use

4.6

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

[Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.40 (160)](https://www.capterra.com/p/230507/Thunderbird/reviews/)

vs

[Zoho Mail](https://www.capterra.com/p/174694/Zoho-Mail/)[4.52 (1,066)](https://www.capterra.com/p/174694/Zoho-Mail/reviews/)

$0

Price

$1/month

4.3

Features

4.4

4.3

Ease of Use

4.4

[View full comparison](https://www.capterra.com/compare/174694-230507/Zoho-Mail-vs-Thunderbird)