# Compare Kit vs Thunderbird 2026 | Capterra

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

Source: https://www.capterra.com/compare/175000-230507/ConvertKit-vs-Thunderbird

---

# Kit 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:

KitThunderbird2/4 selected

[Kit](https://www.capterra.com/p/175000/ConvertKit/)[4.6 (239)](https://www.capterra.com/p/175000/ConvertKit/reviews/)

[Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.4 (156)](https://www.capterra.com/p/230507/Thunderbird/reviews/)

[## Kit](https://www.capterra.com/p/175000/ConvertKit/)[4.6 (239)](https://www.capterra.com/p/175000/ConvertKit/reviews/)

Starting Price

$29.00/month

Value-for-Money

4.3

Functionality

4.5

Ease of Use

4.4

Customer Service

4.4

Reviews Sentiment

Based on [239 reviews](#user-reviews)

Positive

224

Neutral

12

Negative

3

[## Thunderbird](https://www.capterra.com/p/230507/Thunderbird/)[4.4 (156)](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 [156 reviews](#user-reviews)

Positive

135

Neutral

17

Negative

4

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of reviewers  
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## Summary

* * *

Key features rated by users

Features selected based on 11,552 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

4.8

Inbox Management

NA

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

4.6

User reviews[239](https://www.capterra.com/p/175000/ConvertKit/reviews/)

Ease of use

4.4

Functionality

4.5

Value for money

4.3

Customer support

4.4

User satisfaction

4.4

User reviews[156](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

$29Flat Rate, Per Month

-   Free version
-   Free trial

Price starts from

\--

-   Free version
-   Free trial

Best for

Best for

Kit exists to help creators earn a living online. A creator can be a blogger to a poet to a podcaster... creators make a living doing work that matters and they make their living online.

Best for

Not provided by vendor

## User reviews

Pros & cons

Javier M.

Oracle DBA - Teacher - Content Creator

> "I have Kit integrated with WP, LearnWorlds (previously with Patreon and Teachable) and I could tag all subscribers to drive..."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6789885)

Tracie B.

Executive Director

> "The templates provided for paid subscribers are very basic, must be edited on a desk top, and the price increases significantly..."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___7098145)

JY

Julianna Y.

CEO and Coach

> "Their segmentation, automation and variety of landing pages could be overwhelming (or distracting), but doesn't really need to be...."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6298657)

CW

Cassidy W.

Health Coach

> "Despite the wealth of instruction, I'm still finding myself hung up and confused at times about how to navigate setting up a..."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6776485)

RO

Ricki O.

Founder

> "The intuitive interface and powerful automation features have helped me streamline their email marketing and find a way to build a..."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6540870)

Judith S.

Email Marketing Specialist

> "There is less flexibility when researching advanced customization options.- It also lacks advanced features like AB testing and..."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___5088825)

Javier M.

Oracle DBA - Teacher - Content Creator

> "I like the automations and sequences, and the segmentation and tagging features."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6789885)

AC

Allison C.

Founder

> "Felt pretty limited in workflows, low customer support, not the best UI."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6698883)

AM

Andreea M.

Founder

> "I really love all the features available and how easy it is to create forms, send out newsletter, resend to unopens, collect email..."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6561529)

Zachary W.

Enterprise Account Manager

> "Did not like their segmentation and popup capabilities, both seem pretty limiting for an ESP."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6685394)

AL

Andrea L.

Marketing Manager

> "I easily uploaded my list and created a template faster than I've ever done with others."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6793083)

ED

Emily D.

Small Business Owner - Sole Proprietor

> "They even allowed me to downgrade after I tried the paid version for a few months. "

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6565301)

CD

Caleb D.

Lifecycle Marketing Manager

> "I also love that their customer support team is active and will reply with solutions quickly."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___7042534)

SG

Shannon G.

Master Coach

> "It pretty expensive for new startups trying to get a foot in the door."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6683477)

VR

Verified Reviewer

Owner

> "ConvertKit has many tools that were helpful in developing marketing instruments for my brand."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6464106)

RO

Ricki O.

Founder

> "It can get pricey."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6540870)

AL

Andrea L.

Marketing Manager

> "Kit has the most robust free plan I've seen in the email marketing space, and their platform was extremely easy to use."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6793083)

Ngala Emmanuel S.

Web Designer

> "I think the landing page builder still lacks some advanced features."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___5013387)

MN

Morgan N.

Operations Manager

> "Our \[sensitive content hidden\] has utilized ConvertKit for email campaign management for years and the features just continue to..."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6489553)

Laura D.

Owner

> "I had a little trouble figuring out how to customize the text at bottom of my emails, the update subscriber info and unsubscribe."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___3448177)

CW

Cassidy W.

Health Coach

> "I was looking for something simple and easy to navigate, while still presenting a polished look with functionality."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6776485)

Tchameni C.

Creative Motion Graphic Designer And WordPress Web Designer

> "there are quite a few number of advanced options that I find to be missing.-"

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___5079302)

VR

Verified Reviewer

Owner/CEO

> "It is also easy to create new broadcasts (emails), and ConvertKit recently added the ability to have saved brand colors, so..."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___5006362)

SR

Sanket R.

Customer service

> "I'm not new to email marketing, but I tried ConvertKit and didn't stick with them."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___4945574)

VI

Vanessa I.

Registered Dietitian

> "It's very easy to use, most things I can do intuitively, and if not, then there are easy-to-follow videos to walk me through."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6815957)

SM

Stephanie M.

Owner

> "For landing page design, there's a lot of customization that's missing, but I don't use it for that primarily."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___3560799)

MN

Morgan N.

Operations Manager

> "It has played a vital role in lead generation and the continued success of our company."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6489553)

LC

LaMeshia C.

Founder

> "I can't change or insert fields."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6107962)

JC

Jacqueline C.

Brand Designer

> "This platform is great for growing your audience regardless of where you're starting in the process."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6656191)

JM

Juliana M.

Chief Operations Manager

> "I still think the price is a little high if you compare to other softwares, specially if the dollar is not your main currency."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___3580276)

RM

Rachel M.

Digital Campaign Executive

> "ConvertKit is a good tool for email marketing, but it's expensive."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6578404)

Favour N.

CEO

> "It has an easy to use interface but I don't like how some features are not so visible which could make it unknown to people that..."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___4381639)

MH

Monica H.

Executive Director

> "There is a bit of a learning curve when you first start, but CK is a powerful email marketing tool with loads of customizations and..."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___4894784)

NS

Nicola S.

CEO

> "As the company grew the price became higher without significant improvement in the product"

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___4601087)

AM

Andreea M.

Founder

> "It has many of the features I need in a newsletter provider."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6561529)

AS

Aimee S.

Director

> "Right now I haven’t found anything that’s been difficult to use or any features that I wish were included."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___3799111)

DC

Dewana C.

Nursepreneur

> "I loved that it was free to start up to a couple thousand contacts. "

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6274757)

SM

Stephanie M.

Owner

> "I can't think of anything I don't love about ConvertKit for email."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___3560799)

Judith S.

Email Marketing Specialist

> "I like Convertkit because its templates are easily customizable compared to some other landing page builders that I've tried."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___5088825)

Dustin S.

CEO

> "What I don't like the most about ConvertKit is the pricing."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___3820788)

SI

Susie I.

Brand Strategist

> "The interface is clean and uncluttered."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6240788)

MV

Manideep V.

Podcaster

> "Even though it's a good product it has its flaws."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___4600263)

VR

Verified Reviewer

Social media manager

> "It was one of the best newsletter software I used and helped me gain an audience"

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6686220)

AS

Angela S.

Blogger/Owner

> "No big dislikes for Convertkit so far because I don't need the full range of features yet for where I am in my business"

[See full review](https://www.capterra.com/p/175000/ConvertKit/#GetApp___3160442)

JL

Jennifer L.

Owner

> "There are a lot of integrations with course platforms and other software that work with convertkit. "

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___5001097)

Emil E.

Growth Marketer

> "So make sure you don't upload any purchased list or something, immediately the team will block your account."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___2838382)

SR

Sanket R.

Customer service

> "I changed stages because I needed to create an evergreen 30-day email series that anyone could access at any time."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___4945574)

GL

Gina L.

Founder

> "ConvertKit allows you to tag people who purchase products through their various integrations but it's a bit lacking in terms of..."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___2486464)

MS

Mikaela S.

Assistant Manager

> "Very helpful and easy to use."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6793278)

VR

Verified Reviewer

Business Coach

> "The positive is that they give you a lot of options as to what you can do in email marketing and then the negative is that they..."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___2429502)

MS

Mikaela S.

Assistant Manager

> "It’s very helpful and offers many good and helpful tools!"

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6793278)

LS

Leigh S.

Company Director

> "I've now raised these exact same questions again to convertkit to seek help, hopefully I won't get an automated response and have..."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___2283169)

OZ

Olga Z.

Founding CEO & Principal Business Growth and Marketing Coachsultant

> "Finally, ConvertKit has all the features we need for our email marketing efforts to be a success: great segmentation, automations,..."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___3733596)

SP

Simon P.

Director

> "The free version lacks a lot of the good features."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___2839280)

VR

Verified Reviewer

Owner

> "I enjoyed using the free version of the platform."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6464106)

AF

Amy F.

Owner

> "I've noticed that certain things that should just work need special attention... like moving to the next part of an automation..."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___2667721)

RM

Rachel M.

Digital Campaign Executive

> "ConvertKit is easy to use and has a lot of features."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6578404)

AF

Amy F.

Owner

> "There's literally no way to troubleshoot this stuff on your own the information is just not available so you'd have to go through..."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___2667721)

Arthur C.

Director

> "Convert Kit prioritizes user experience, especially evident in its automation features."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6048788)

VR

Verified Reviewer

President

> "I was never alerted that a .org was not an acceptable email to mail out from and my entire campaign that was to be sent out over a..."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___2206067)

CW

Chandler W.

Freelancer

> "The customer support is always outstanding, with quick replies and they always can solve an issue for me, and if they can't they..."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___4854735)

VR

Verified Reviewer

Email. Marketer

> "It is quite expensive for a newbie who is trying to expand the market."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___3056388)

VR

Verified Reviewer

Writer

> "Overall easy to use, though I'd like more onboarding and I think the price is too high."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6326968)

MM

Marie M.

Founder

> "I'm not sure what I'm missing, but I do wish I could have better data from CK on best days and time of day my emails are being..."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___2416704)

LC

LaMeshia C.

Founder

> "When I first used Convertkit to create a simple landing page it was fantastic."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6107962)

Emil E.

Growth Marketer

> "The only thing I can't expect is automation."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___2838382)

BM

Becky M.

Coach

> "Using ConvertKit has helped me grow my business by maintaining a regular email list and keeping in frequent contact with my..."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___3814645)

AF

Amy F.

Owner

> "They are not happy. When people get stuck in sequences they go "cold"... then I end up sending a reengagement sequence before..."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___2667721)

SD

Soma D.

Lead Educator

> "Ease of use and friendly/always available customer support"

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6235349)

Jared D.

Manufacturing Engineering and Facilities Manager

> "Convert kit doesn't have as many design tools as some of the other email services."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___2701889)

LH

Louise H.

Business Owner

> "I really like the function that you can tag leads and send them into different funnels and send them personalized emails."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___3603293)

ZV

Zephyr V.

Entrepreneur

> "Convertkit is pretty expensive."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___2805397)

ED

Emily D.

Small Business Owner - Sole Proprietor

> "The customer service is fantastic. "

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6565301)

VR

Verified Reviewer

Business Coach

> "I feel like ConvertKit isn't beginner friendly because when you first sign onto there the interface is too overwhelming."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___2429502)

MH

Monica H.

Executive Director

> "I also love the email templates that make my weekly emails easy to complete. "

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___4894784)

AF

Amy F.

Owner

> "I also don't like that there's very little you can do to customize emails."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___2667721)

JW

Justin W.

Marketing Coach

> "Overall, I'd give ConvertKit another try because I think the platform itself is great and they've likely added a lot of features..."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6001074)

JB

Jeremy B.

Web Owner

> "They make it extremely difficult to get anything out of it, with all their technical jargon and crap."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___2207464)

YD

Yasmin D.

Mindfulness Life Coach

> "Their customer service and training videos are always on point."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___6126224)

TS

Tyneisha S.

Owner

> "Even though it is very feature rich, I do find the basic plan to still be somewhat too expensive."

[See full review](https://www.capterra.com/p/175000/ConvertKit/#Capterra___2238407)

[View Reviews](https://www.capterra.com/p/175000/ConvertKit/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)

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)

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)

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)

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)

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)

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)

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)

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 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)

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

> "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)

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)

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)

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)

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)

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)

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)

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)

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

> "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)

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)

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)

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

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)

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)

Gonzalo M.

Managing Director

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

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

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)

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)

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

> "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

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

> "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

> "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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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

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)

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)

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)

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)

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)

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)

SP

Shawn P.

Owner

> "The UI is incredibly outdated."

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

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

[Kit](https://www.capterra.com/p/175000/ConvertKit/)

4.64 (239)

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

4.40 (156)

### 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

Kit

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/175000/ConvertKit/#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

No recognitions have been awarded to Kit

No recognitions have been awarded to Thunderbird

### Deployment & support

Kit

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

Kit

-   By ConvertKit
-   Located in United States
-   Founded in 2013

Thunderbird

-   By Mozilla
-   Located in United States
-   Founded in

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