Thunderbird AlternativesOnly apps categorised as Group Chat Apps

The best Group Chat alternative to Thunderbird is Mailspring, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Thunderbird and five of them are Group Chat Apps so hopefully you can find a suitable replacement. Other interesting Group Chat App alternatives to Thunderbird are Delta Chat, Spike, Unibox and Missive.

filter to find the best alternatives

Thunderbird alternatives are mainly Group Chats but may also be Email Clients or Calendar Apps. 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.

More about Thunderbird

Thunderbird alternatives page was last updated Sep 26, 2024

Mailspring
Boost your productivity and send better email with Mailspring, a beautiful, fast email client for Mac, Windows, and Linux. Mailspring is free to use and an optional pro version adds read receipts, send later, reminders and more.
43 Mailspring alternatives
License model
- Freemium • Open Source
Application type
- Email Client
Platforms
- Mac
- Windows
- Linux
- Arch Linux
- Fedora
- Ubuntu
+1
Top Mailspring Features
1. Unified inbox
2. Multiple Account support
3. Dark Mode
4. Customizable
5. Email tracking
6. User friendly
7. Snooze Mail
8. Ad-free
9. Theme Customization
10. Support for Themes
11. Email Organizer
12. Extensible by Plugins/Extensions
Show all NaN Mailspring features ▾
Mailspring VS Thunderbird
Is Mailspring a good alternative to Thunderbird?
Comments about Mailspring as an Alternative to Thunderbird

3psilon
Great alternative, especially for casual users. Simple, streamlined UI, feels fresh.
Top positive comment •May 2, 2018
1
Riska Asmara
Simple, more streamlined UI and easily customizable.
Top positive comment •Feb 1, 2019
4
Guest
Need to create an account on a third-party company to access your email.
Top negative comment •Sep 28, 2018
59
Matt Schaefer
Unable to even find an address book or ability to import a csv file from previous mail client. You lose me when things are made so "modern-clean" that I have to consult a manual or Google things.
Negative comment •Jul 15, 2022
0
Peter Bromfield
nice interface (if you are talking about the feature, kcontact/kmail is the best, but this has a nice interface)
Positive comment •Feb 20, 2018
-3
Show more comments
5 of 7 comments
- Most users think Mailspring is a great Thunderbird alternative.
- Mailspring is Freemium and Open SourceThunderbird is Free and Open Source

Delta Chat
Delta Chat looks and feels like other popular messenger apps, but does not involve centralized control, tracking or selling you, friends, colleagues or family out to large organizations. "Privacy by Design" has never been more fun.
67 Delta Chat alternatives
License model
- Free • Open Source
Application types
- Instant Messenger
- Video Calling App
Platforms
- Mac
- Windows
- Linux
- Android
- iPhone
- Android Tablet
- iPad
- Snapcraft
- Flathub
- F-Droid
+1
Top Delta Chat Features
1. Decentralized
2. Encrypted Email
3. IMAP Support
4. Multiple languages
5. End-to-End Encryption
6. Dark Mode
7. Privacy focused
8. Ad-free
9. Unified inbox
10. Self Destructing Messages
11. Multiple Account support
12. Electron based
Show all NaN Delta Chat features ▾
Delta Chat VS Thunderbird
Is Delta Chat a good alternative to Thunderbird?
Comments about Delta Chat as an Alternative to Thunderbird

BadTek
More like an IM, not a full-featured email client.
Negative comment •Nov 27, 2021
4
GeminiDomino
It doesn't let you read existing email, it's a chat client that uses an IMAP mail server as its back end
Negative comment •Oct 22, 2021
5
Mehrad Mahmoudian
Delta chat (as the name also indicates) is for chatting, and it uses email as a backend. This means user will chat as if they are on WhatsApp or etc. but in background DeltaChat communicates via sending and receiving emails.
Negative comment •Apr 15, 2024
0
Guest
It's an IM over Email client meant to replace messenger type apps.
Negative comment •Sep 12, 2024
0
- This alternative is disputed. Delta Chat is a legitimate Thunderbird alternative, but it might have issues that some users think are important.
- Delta Chat is Free and Open SourceThunderbird is also Free and Open Source
- Delta Chat is Decentralized and Privacy focusedThunderbird is not according to our users

Spike
Bring your workspace together into one unified app. It’s everything your team has been looking for in a productivity and messaging app, but easier, and all with your email. Welcome to the shortest path to done.
63 Spike alternatives
License model
- Freemium • Proprietary
Application types
- Email Client
- Group Chat App
Platforms
- Mac
- Windows
- Online
- Android
- iPhone
- Chrome OS
- Android Tablet
- iPad
- Software as a Service (SaaS)
- Oculus Rift
+4
Top Spike Features
1. Unified inbox
2. Dark Mode
3. Email Organizer
4. Cloud Sync
5. Multiple Account support
6. Reminders
7. Real time collaboration
8. Live Preview
9. Built-in File Manager
10. Send later
11. Read confirmation
12. Snooze reliability
Show all NaN Spike features ▾
Spike VS Thunderbird
Is Spike a good alternative to Thunderbird?
Comments about Spike as an Alternative to Thunderbird

Guest
Native onlye for Android, iOS, Windows and Mac, not a Linux app
Positive comment •Aug 8, 2020
1
- Spike is the most popular SaaS alternative to Thunderbird.
- Spike is Freemium and ProprietaryThunderbird is Free and Open Source

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
Show all NaN Unibox features ▾
Unibox VS Thunderbird
Is Unibox a good alternative to Thunderbird?

Missive
Collaborative email and threaded group chat for productive teams. A single app for all your internal and external communication.
21 Missive alternatives
License model
- Freemium • Proprietary
Application types
- Email Client
- Help Desk Platform
Platforms
- Mac
- Windows
- Online
- Android
- iPhone
+6
Missive Features
1. Unified inbox
2. Shared inbox
3. Threaded Conversations
4. Email Scheduling
5. Multiple Account support
6. Customer service
7. Email automation
8. Integrated Web Browser
9. Snooze Mail
Show all NaN Missive features ▾
Missive VS Thunderbird
Is Missive a good alternative to Thunderbird?