Thunderbird AlternativesOnly apps categorised as Calendar Apps
The best Calendar alternative to Thunderbird is Claws Mail, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Thunderbird and 14 are Calendar Apps so hopefully you can find a suitable replacement. Other interesting Calendar App alternatives to Thunderbird are Evolution, Betterbird, eM Client and Spark Mail.
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Thunderbird alternatives are mainly Email Clients, but if you're looking for Calendar Apps or Contact Managers you can filter on that. Other popular filters include Windows + Open Source. You can also filter by region, for example EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to Thunderbird.- Email Client
- Free • Open Source
61 Claws Mail alternativesClaws Mail is an email client (and news reader), based on GTK+, featuring
Quick response Graceful, and sophisticated interface Easy configuration, intuitive operation Abundant features Extensibility Robustness and stability.
Claws Mail VS Thunderbird
Comments about Claws Mail as an Alternative to Thunderbird
Top Positive CommentTop Negative CommentNo HTML compose is the only reason I don't switch to it. We're not in 1980 anymore.
Most Recent CommentSViNI think most people are using gmail accounts or outlook accounts to access their emails. Claws supports Oauth2 to access said accounts but the implementation, is a complete PAIN.
I can only realistically recommend something like this if your email provider is not forcing Oauth2.
I would like for the devs to get to work into making the experience of setting up an account with oauth as painless as thunderbird.
72 Evolution alternativesEvolution is a personal information management application that provides integrated mail, calendaring, address book and task list functionality.
License model
- Free • Open Source
Application types
Country of Origin
United States
Platforms
- Linux
- BSD
- Flathub
- S/MIME
- GNOME
- OpenPGP
Top Evolution Features
Evolution VS Thunderbird
Comments about Evolution as an Alternative to Thunderbird
Top Positive CommentMichel Th.I use both Thunderbird and Evolution, sometimes Claws-Mail. Evolution is the only one that can show the real "received" date in scams I have been receiving for months. In a today's scam Evolution shows "sent date" (falsified) 14-12-2019 and "received date" 30-01-2023 (evidently true). Thunderbird and Claws-Mail show 14-12-2019 in both columns.
Most Recent CommentRemovedUserAs someone who is forced to use M365 at work (but ditching it at home, I let my subscription lapse) this is the closest visually to Outlook. That's important to me. The workflow is essentially identical.
Syntevo GmbHUnfortunately, only available on Linux, not on Windows, not on MacOS. Otherwise promising.
27 Betterbird alternativesBetterbird, a soft fork of Mozilla Thunderbird, improves user experience with advanced features, bug fixes, security patches, and multi-row descriptions similar to Outlook. Compatible with multiple platforms and can be used alongside Thunderbird, sharing the same profile.
License model
- Free • Open Source
Application types
Country of Origin
Germany
EU
Platforms
- Mac
- Windows
- Linux
- Flathub
- Chocolatey
Betterbird VS Thunderbird
Comments about Betterbird as an Alternative to Thunderbird
Top Positive CommentSam LanderBetterbird does everything that Thunderbird does (it's a soft fork), while improving bugs and features.
Because it's a soft fork, it retains the security implementations of Thunderbird.
Thunderbird actually implements many of the bug fixes created by Betterbird, but at a much slower pace.
Most Recent Commentdrummer_nrgBetterbird is actively updated by a previous Thunderbird developer and is a fully compatible fork of Thunderbird which fixes some outstanding bugs. My add-ons like keepassxc-mail work fine!
It has many fixes for long existing bugs
61 eM Client alternativesLooking 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 your email, calendar, tasks, contacts, notes, and chat all in one place.
With support for IMAP, calendar integration, and multiple accounts, eM Client is the perfect choice for users who want a robust email client that can handle all their needs. Whether you're using Windows or Mac, eM Client is the most popular proprietary alternative to Thunderbird, offering a powerful and flexible solution for managing your email and staying organized. Give it a try today and see why so many users are making the switch to eM Client.
License model
- Freemium • Proprietary
Application types
Country of Origin
- United States
Platforms
- Mac
- Windows
- Android
Top eM Client Features
eM Client VS Thunderbird
Comments about eM Client as an Alternative to Thunderbird
Comment summary: eM Client presents a clean interface with more built-in functions than Thunderbird, making it appealing for Mac and Windows users who prioritize design. However, users criticize it for being closed source, not supporting Linux, and having limited free accounts. Concerns include slow email rendering and potential phishing risks detected by antivirus software. Thunderbird remains favored for advanced configurability while eM Client is considered a viable alternative if users don't mind these limitations.Top Positive Comment3psilonA good Windows alternative if you use 1-2 mailboxes or don't mind paying.
Top Negative CommentLinuxDogedoesnt support Linux, isnt open source, not configurable enough
Most Recent CommentI am spezticleAfter installing I got malwarebytes and AVG antivirus alerts containing threats of phishing with urls such as "http://walmartsurvys.us/apple-touch-icon-precomposed.png" by way of the eM Client executable "MailClient.exe" There was a dozen more of them
Do not install this phishing trash
61 Spark Mail alternativesE-mail app with all the great features: swipes (long/short), snooze, add (multiple) attachments from the cloud, support for various e-mail services and more.
License model
- Freemium • Proprietary
Application types
Country of Origin
Ukraine
Platforms
- Mac
- Windows
- Android
- iPhone
- iPad
- Apple Watch
Top Spark Mail Features
Spark Mail VS Thunderbird
Comments about Spark Mail as an Alternative to Thunderbird
folkomatonFree, simple, reliable, easy to manage multiple accounts, fair amount of customization, synchronisation, templates
rmpbklynno sorting, dont show allmail for gmail
125 Microsoft Outlook alternativesStreamline emails, calendars, contacts, and task management with a smart inbox prioritizing critical messages. Includes calendar scheduling, third-party app integration like Facebook, Dropbox, and Trello, and support for Microsoft Exchange, Outlook.com, and Gmail, ensuring efficient task and email handling.
License model
- Paid • Proprietary
Application types
Country of Origin
- United States
Platforms
- Mac
- Windows
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Apple Watch
- Android Wear
Top Microsoft Outlook Features
Microsoft Outlook VS Thunderbird
Comments about Microsoft Outlook as an Alternative to Thunderbird
Top Positive CommentEyjiAs a Firefox user, I have tried to love Thunderbird but it just can't compete with Outlook, IMHO.
Top Negative CommentLinuxDogeNot open source, not privacy-focused, no Linux support
Most Recent Commentoutlook is clumsy and bloated and does nothing well. tbird does one thing and well.
Canary can write your emails, prioritize what needs attention, silence spam & much more. Say hello to your Inbox Copilot!
License model
- Freemium • Proprietary
Application types
Country of Origin
United Kingdom
Platforms
- Mac
- Windows
- Android
- iPhone
- Android Tablet
- iPad
- Apple Watch
Canary Mail VS Thunderbird
Despite the style, Claws is super fast and allow you to programs it with Perl and Python which is great for marketing automation.