Thunderbird Alternatives

Thunderbird is described as 'Free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox' and is a leading Email Client in the office & productivity category. There are more than 50 alternatives to Thunderbird for a variety of platforms, including Windows, Mac, Linux, Android and iPhone apps. The best Thunderbird alternative is K-9 Mail, which is both free and Open Source. Other great apps like Thunderbird are Claws Mail, Evolution, SeaMonkey and Geary.

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Thunderbird alternatives are mainly Email Clients but may also be Calendar Apps or Web Browsers. Filter by these or use the filter bar below if you want a narrower list of alternatives or looking for a specific functionality of Thunderbird.

Thunderbird

2385

Email Client
Free • Open Source

Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox.

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Thunderbird alternatives page was last updated Sep 26, 2024

Unibox
Unibox is a people centric email client that organizes your messages by person. It avoids having email like a to-do list.
27 Unibox alternatives
License model
- Paid • Proprietary
Application type
- Email Client
Platforms
- Mac
Unibox Features
1. Ad-free
2. Unified inbox
3. Email Organizer
4. Multiple Account support
5. Full-Text Search
6. Conversational email approach
7. IMAP Support
8. Inbox Management
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Unibox VS Thunderbird
Is Unibox a good alternative to Thunderbird?

Polymail
The most powerful platform for email productivity in a beautiful native app — on desktop and mobile.
80 Polymail alternatives
+3
License model
- Paid • Proprietary
Application type
- Email Client
Platforms
- Mac
- Windows
- Online
- iPhone
- iPad
Polymail Features
1. Email Scheduling
2. Multiple Account support
3. IMAP Support
4. Sync Contacts
5. Email tracking
Show all NaN Polymail features ▾
Polymail VS Thunderbird
Is Polymail a good alternative to Thunderbird?

MailDroid
Need a great working email client on Android? MailDroid is the one you should download! Has the power of Outlook and Thunderbird for your Android device.
3 MailDroid alternatives
+3
License model
- Paid • Proprietary
Application type
- Email Client
Platforms
- Android
- S/MIME
- OpenPGP
MailDroid Features
PGP Encryption
POP3 Support
S/MIME Support
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MailDroid VS Thunderbird
Is MailDroid a good alternative to Thunderbird?
Comments about MailDroid as an Alternative to Thunderbird

Guest
wrong platform - maildroid is for android only, thunderbird is for desktops
Negative comment •Oct 8, 2020
2
Guest
A long term reliable solution for Android. Run for many years now and works as well on Android as Thunderbird does on PC
Positive comment •Jan 16, 2017
2
yahoobob
Communicates direct to the servers, does not leave anything in the cloud or with 3rd party servers.
Positive comment •Apr 28, 2017
0
- Most users think MailDroid is a great Thunderbird alternative.
- MailDroid is Paid and ProprietaryThunderbird is Free and Open Source

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eM Client
Looking for a full-featured email client with a modern and easy-to-use interface? Look no further than eM Client. Rated 3 out of 5, eM Client is a popular alternative to Thunderbird, offering all the features you need to manage y...

https://www.emclient.com
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monocles mail
monocles mail is a fork of the K-9 mail version 5.600 with the old K-9 mail layout.
41 monocles mail alternatives
+2
License model
- Freemium • Open Source
Application type
- Email Client
Platforms
- Online
- Android
- F-Droid
monocles mail VS Thunderbird
Is monocles mail a good alternative to Thunderbird?

sup
Sup is a console-based email client for people with a lot of email. It supports tagging, very fast full-text search, automatic contact- list management, custom code insertion via a hook system, and more.
50 sup alternatives
License model
- Free • Open Source
Application types
- Email Client
- Contact Manager
Platforms
- Linux
sup Features
Multiple Account support
Command line interface
Console-based
IMAP Support
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sup VS Thunderbird
Is sup a good alternative to Thunderbird?

Simple Email
Free Software, minimalistic and privacy friendly email app for Android.
14 Simple Email alternatives
License model
- Free • Open Source
Application type
- Email Client
Platforms
- Android
Simple Email VS Thunderbird
Is Simple Email a good alternative to Thunderbird?

nPOPuk
nPOPuk is an ultra-small, but comprehensive, e-mail client that runs on a wide range of Windows-based operating systems
72 nPOPuk alternatives
License model
- Free • Open Source
Application type
- Email Client
Platforms
- Windows
- Windows Mobile
nPOPuk Features
Portable
POP3 Support
Show all NaN nPOPuk features ▾
nPOPuk VS Thunderbird
Is nPOPuk a good alternative to Thunderbird?