# Compare Kiwi for Gmail vs Thunderbird 2026 | Capterra

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

Source: https://www.capterra.com/compare/215392-230507/Kiwi-vs-Thunderbird

---

# Kiwi for Gmail vs Thunderbird Features and Cost Comparison

Last updated March 13th, 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:

Kiwi for GmailThunderbird2/4 selected

[Kiwi for Gmail](https://www.capterra.com/p/215392/Kiwi/)[4.4 (182)](https://www.capterra.com/p/215392/Kiwi/reviews/)

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

[## Kiwi for Gmail](https://www.capterra.com/p/215392/Kiwi/)[4.4 (182)](https://www.capterra.com/p/215392/Kiwi/reviews/)

Starting Price

$2.75/month

Value-for-Money

4.3

Functionality

4.3

Ease of Use

4.5

Customer Service

4.3

Reviews Sentiment

Based on [182 reviews](#user-reviews)

Positive

164

Neutral

11

Negative

7

[## 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 11,895 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

Feature ratings

Mobile App

NA

Email Distribution

NA

Inbox Management

4.5

Email Monitoring

NA

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

4.4

User reviews[182](https://www.capterra.com/p/215392/Kiwi/reviews/)

Ease of use

4.5

Functionality

4.3

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

$2.75Per Month

-   Free version
-   Free trial

Price starts from

\--

-   Free version
-   Free trial

Best for

Best for

Kiwi helps employees save significant time each day compared to using Google Workspace via a traditional web browser. Over half of our Business end-users estimate that Kiwi saves them 30 mins per day.

Best for

Not provided by vendor

## User reviews

Pros & cons

LM

Larry M.

Owner

> "Of course, during the pre-purchase period when I was asking questions about Kiwi prior to paying for it, their support system..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___4928351)

Kaan K.

civil engineer

> "Definitely stay away. When you cancel your subscription, they cancel all your existing services."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___6640040)

KR

Katie R.

Operations Director

> "It helps me stay on task with emails because I can see what inboxes need the most work and easily move between them."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3804995)

Kaan K.

civil engineer

> "You can never reach customer service."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___6640040)

NT

Nik T.

Graphic Designer

> "I can have multiple accounts open at once, and even jump straight to my Google Drive files."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3799277)

ST

Soraya T.

Operations Manager

> "For a long period of time it was very difficult for me to be able to use my MacBook efficiently as its huge energy and processor..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3834155)

OM

Olivia M.

Human resources manager

> "Kiwi makes Gmail access so efficient and easy on a desktop sparing multiple log in on a browser."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3735023)

JP

James P.

Senior Analyst

> "Attachments and Google Drive products don't always render/load properly and sometimes links need to be pasted directly into a..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___4473917)

DC

Dakota C.

CTO

> "It allows me to have a bunch of email inboxes in one place."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3795125)

Kaan K.

civil engineer

> "No support."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___6640040)

YW

Yehuda W.

Admin

> "Finally a great email management desktop software that supports Gmail's with ease without eating tons of pc power and memory"

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3795400)

JA

Juan A.

Bus owner

> "It keeps asking to verify passwords every few days on each account as well, this is time consuming and it kind of defeats the..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3815631)

NT

Nik T.

Graphic Designer

> "The M1 version of Kiwi is MUCH faster than running under Rosetta - so this app does everything I need, and at a speed I can..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3799277)

LM

Larry M.

Owner

> "That I could not get a reply from Kiwi Support as a paid subscription customer."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___4928351)

MF

Maria F.

Designer

> "I love that I can keep several accounts in just one app, including my personal email accounts."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3795314)

JA

Juan A.

Bus owner

> "the account names should be visible all the time on the menu, they are greyed out and in a very small and difficult font to read,..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3815631)

TS

Tim S.

Education Specialist (mild/Moderate)

> "The right side of the panel is identical to Gmail and allows you to chat, and launch your calendar or Zoom/WebX easily without..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3495434)

ST

Soraya T.

Operations Manager

> "Like I mentioned previously for a long period of time I couldn't efficiently use my work laptop as it would lag all the software..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3834155)

NT

Nik T.

Graphic Designer

> "Having a standalone app that my Mac can use as the default mail app is great."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3799277)

JA

Juan A.

Bus owner

> "It is hard to differentiate between accounts, there's colors assigned but when you have several accounts that does not help."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3815631)

ZR

Zane R.

Retired

> "Kiwi was exactly what I needed to move seamlessly between the three email accounts that I manage."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3834265)

PR

Peter R.

Owner/President

> "Customer service is non-existent. "

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___5091662)

MN

Marion N.

Owner

> "It's fast and works just like the browser version (more on that later) but helps focus the user by keeping the mail and google..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3231427)

SP

Suzanne P.

Brand Copywriter

> "There's a glitch with my calendar, which I explained on the previous page."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3800810)

Jessi F.

Director of Marketing and Operations

> "With Kiwi, all my accounts are accessible, my most used google docs are accessible, and none of it affects Chrome"

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2984056)

PR

Peter R.

Owner/President

> "Never received a reply. "

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___5091662)

JT

Jamie T.

Director of Production

> "It's brilliant to have the functionality of Gmail as a desktop app, makes life much simpler as I value that control as opposed to..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2858668)

Jessi F.

Director of Marketing and Operations

> "Gmail doesn't have a native app to see them all on my mac and it bogs Chrome down to have it all open."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2984056)

BW

Branden W.

VP, IAM Strategy

> "Having easy access to the entire G-Suite is nice as well."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3814222)

JB

James B.

Learning Strategist

> "It isn't easy to simply switch between open documents/windows, etc."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3796745)

Gurvinder K.

Internet judge

> "Kiwi gives me the freedom to access all my emails at the same time without a browser.  "

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2986239)

Oscar M.

Managing Director

> "In a sense, it's a glorified web browser for Gmail use only, and if you strip it from the drive and gsuite apps capabilities and..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2696150)

JA

Juan A.

Bus owner

> "It is a good program but it needs important improvements on the things I mentioned above."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3815631)

JT

Jamie T.

Director of Production

> "It occasionally crashes on startup and won't open, requiring a full computer restart to get it working."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2858668)

HL

Heidi L.

Minister of Congregational Vision & Vitality

> "I loved that this software puts everything at my fingertips - my docs, calendar, drive, etc., and allows me to have my email..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2728333)

CP

Chetan P.

Blank

> "Even i requested to kiwi refund my amount, they did not want to lishen and not accepted their guilty."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3212419)

CD

Chris D.

data architect

> "The real benefits came when I upgraded to G-Suite which allows me to access Google based content (docs, sheets, drives) from one..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2638468)

Gurvinder K.

Internet judge

> "Sometimes it freezes and I have to exit and restart this.  "

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2986239)

SF

Slinger F.

Sales Manager

> "Goode UI design, operation is extremely easy to use, and the price is reasonable."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3814221)

JB

Joel B.

CEO

> "Does not over come the limitation of more than 100 emails per view which is also a limitation of Gmail inio a browser."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2638304)

RH

Roger H.

Principal Consultant

> "Seamless integration with Google Suite for Business and everything being in one place e.g. unified email inbox, calendar,..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2654719)

SC

Sam C.

Chief Strategy Officer

> "Add ons need to be expanded and the development + product team needs to be AHEAD, keep up and communicate to users with PC /Mac..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2693909)

JA

Juan A.

Bus owner

> "Is easy to access as an app on the mac desktop."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3815631)

SS

Sam S.

Web Developer

> "I cannot get my video calls to work since the update 3.2.0 and cannot get support to respond to me"

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2733213)

BA

Brad A.

Pastor

> "Getting away from the browser function and using GSuite features such as Gmail, Google Calendar, and Google Docs all locally in..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2716290)

VR

Verified Reviewer

Principal

> "Unfortunately, the manner in which they integrate the parts and pieces forces just enough of a change in how I work that the..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2679289)

SM

Shankar M.

Manager

> "Kiwi for GMAIL consolidates GMAIL with GSUITE brilliantly, allowing multiple email accounts while keeping them easily..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2842997)

MW

Michelle W.

CSR

> "I have recently deleted the program because my company email connects through outlook and there is no way to add that account to..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2718713)

Oscar M.

Managing Director

> "Being able of using a couple of the extensions available is also super helpful in the processes, specially when you need to..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2696150)

RB

Richard B.

Owner

> "Won’t run on Microsoft surface pro X. Often one or more accounts ends up with a blank screen and no way to fix it without..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2667737)

GK

Geoffrey K.

Owner

> "Cost of yearly subscription is great."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3826900)

EW

Elliott W.

Teacher

> "Also the lack of a dark theme (and not having an addon like dark-reader) means that I don't use the calendar."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2791912)

Dave L.

Director of Product Engineering & IT

> "This does an awesome job of allowing you to use Gmail in a dedicated application on MacOSX instead of just having a webpage open...."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2791243)

HL

Heidi L.

Minister of Congregational Vision & Vitality

> "The biggest issues I've had so far is not being able to download files that are attached to emails."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2728333)

TV

Timo V.

Staff Software Engineer

> "Being able to alt-tab directly to my Google Mail and Calendar no matter how many browser windows and tabs I have open is super..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2758808)

JA

James A.

Director, Global Operations

> "I was needing a Gmail client that included s/mime capability but this lacked it. "

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2775471)

Gurvinder K.

Internet judge

> "I can manage many accounts in one app."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2986239)

CP

Chetan P.

Blank

> "I do not ever ever travel throw kiwi."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___3212419)

RC

Richard C.

Physician/Owner

> "The integration of several products into Gmail made me learn of third party apps that I was not aware of before such as Right..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2723666)

FK

Fouad K.

Professor

> "There is an extension in Chrome that does that but it does not work in Kiwi product."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2668324)

Gurvinder K.

Internet judge

> "I can manage all Google programs in one place."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2986239)

DR

David R.

President/Psychologist

> "I switched from apple mail because apple mail was frequently not syncing with gmail."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2799823)

JS

Jason S.

Senior Hardware Manager

> "It works well with multiple accounts, with streamlined access to calendar and google docs & drive."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2726470)

MK

Mark K.

Distinguished Engineer

> "Additionally, when the scrolling of the editing window it gets cumbersome."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2696765)

KM

Kathleen M.

Executive Director

> "I also enjoy that i can add team members emails to stay on top of any fires that may arise in their absence since they are..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2785534)

RV

Rande V.

Husband

> "The calendaring is probably OK, but I've not really gotten around to using it...generally use my iPhone because I'm not a real..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2752728)

SA

Steven A.

Director of Information Technology Solutions

> "Kiwi is a great product, I found them through various Google searches looking for a way to compartmentalize my daily use of the..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2679314)

KS

Kim S.

Senior Specialist, People Operations

> "Can't seem to reduce font size for Calendar view."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2732315)

KS

Kirk S.

Faculty

> "Kiwi has a great user interface and allows me to easily manage six different gmail accounts."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2679905)

LM

Leonid M.

CTO

> "I don't like that every time I open the calendar, it opens a new window."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2853350)

Gurvinder K.

Internet judge

> "Notification and integration are also good."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2986239)

SC

Scott C.

Sr Consultant

> "Kiwi promised 3rd party support for features and support; however, that promise is mostly unfulfilled. "

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2637650)

SM

Shankar M.

Manager

> "I loved the user-friendliness. But what I loved most about it was the easy link to the other parts of G Suite, I could have..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2842997)

BB

Brujo B.

Staff Engineer

> "The lack of hot-keys… I would like to press delete to delete/archive an email"

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2766151)

JB

Jacob B.

Director of User Experience

> "Kiwi has made it so easy for me to see everything in one spot and does a great job and keeping everything organized, but not..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2714408)

VR

Verified Reviewer

Owner

> "Does not allow integration with other email providers"

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2739672)

SK

Scott K.

Senior Network Engineer

> "This makes using multiple monitors easier as I don't have to try and pull tabs into their own windows all the time."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2720408)

SA

Steven A.

Director of Information Technology Solutions

> "I am not a big fan of subscription based licensing for desktop applications."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2679314)

TV

Timo V.

Staff Software Engineer

> "Kiwi beats the standard mail and calendar client in macOS by miles in ease of use and integration with other Google services like..."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2758808)

Khan Md Mohaiuminul Islam S.

Site engineer

> "During my use , Sometimes it freezes up , to continue I need to restart."

[See full review](https://www.capterra.com/p/215392/Kiwi/#Capterra___2809564)

[View Reviews](https://www.capterra.com/p/215392/Kiwi/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)

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)

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)

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)

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

> "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)

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)

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

> "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)

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)

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)

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)

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)

Gonzalo M.

Managing Director

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

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

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

SP

Shawn P.

Owner

> "The UI is incredibly outdated."

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

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)

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)

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)

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)

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)

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)

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

[Kiwi for Gmail](https://www.capterra.com/p/215392/Kiwi/)

4.38 (182)

[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

Kiwi for Gmail

8/47

-   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/215392/Kiwi/#features)

Thunderbird

Top features

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

Kiwi for Gmail 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

Kiwi for Gmail

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

Kiwi for Gmail

-   By Zive
-   Located in United States
-   Founded in

Thunderbird

-   By Mozilla
-   Located in United States
-   Founded in

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4.8

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[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 (17,603)](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)