The Best Free K-9 Mail AlternativesTop Email Clients and other similar apps like K-9 Mail
The best free alternative to K-9 Mail is Thunderbird, which is also Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to K-9 Mail and many of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to K-9 Mail are FairEmail, Evolution, Spark Mail and Mailspring.
K-9 Mail alternatives are mainly Email Clients but may also be Calendar Apps or WebMail Providers. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of K-9 Mail.- 91 Thunderbird alternatives
- Email Client
- Calendar App
- Free • Open Source
- Mac
- Windows
- Linux
- BSD
- AppImageHub
- Snapcraft
- Flathub
- PortableApps.com
- Haiku
- Homebrew
- Chocolatey
Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox.
- - Thunderbird is the most popular Windows, Mac & Linux alternative to K-9 Mail.
- - Thunderbird is the most popular Open Source & free alternative to K-9 Mail.
Thunderbird Features
- Extensible by Plugins/Extensions
- Multiple Account support
- Calendar Integration
- Email Organizer
- Dark Mode
- OpenPGP
- Portable
- GPG Encryption
- Ad-free
- Works Offline
- Full-Text Search
- Mail Filtering
- Unified inbox
- No Tracking
- Import/Export OPML Feeds
- Support for Themes
- Integrated Password Manager
- PGP Encryption
Comments about Thunderbird as a Alternative to K-9 Mail
Tubby 9417A really great client used by many, popular because it supports almost every mail provider (not proton ?), and mail providers provide documentation to integrate with Thunderbird. I recommand
0 - 43 FairEmail alternatives
- Email Client
- Freemium • Open Source
- Android
- Android Tablet
- F-Droid
FairEmail is a privacy-focused email client with a setup wizard that helpfully walks you through the steps to use it with any email provider. There are many privacy settings including encryption via OpenPGP and S/MIME and reformatted emails to avoid phishing.
- - FairEmail is the most popular Android & Android Tablet alternative to K-9 Mail.
FairEmail Features
- Privacy focused
- Multiple Account support
- PGP Encryption
- No Tracking
- Works Offline
- Ad-free
- Unified inbox
- Dark Mode
- Lightweight
- GPG Encryption
- Block Trackers
- Calendar Integration
Comments about FairEmail as a Alternative to K-9 Mail
LongLifeBoth are opensource, privacy oriented, free email clients for Android
0 - 80 Evolution alternatives
- Email Client
- Calendar App
- Free • Open Source
- Linux
- BSD
- Flathub
- S/MIME
- GNOME
- OpenPGP
Evolution is a personal information management application that provides integrated mail, calendaring, address book and task list functionality. Evolution supports a wide range of industry standard data formats and network protocols for information exchange, with an emphasis on...
Evolution Features
- Calendar Integration
- Calendar View
- Spam Filter
- Multiple Account support
- Sync with Google Calendar
- Ad-free
- GPG Encryption
- Reminders
- 59 Spark Mail alternatives
- Email Client
- Calendar App
- Freemium • Proprietary
- Mac
- Windows
- Android
- iPhone
- iPad
- Apple Watch
E-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.
Spark Mail Features
- Multiple Account support
- Email Scheduling
- Cloud Sync
- Dark Mode
- Calendar Integration
- Email Organizer
- Works Offline
- Unified inbox
- Ad-free
- Mail Filtering
- Calendar View
- Sync with Google Calendar
Comments about Spark Mail as a Alternative to K-9 Mail
abogawatSpark is one of the most polished email clients out there, with multi-platform support and an excellent feature set. The free version is good enough for most people.
0 - 43 Mailspring alternatives
- Email Client
- Freemium • Open Source
- Mac
- Windows
- Linux
- Arch Linux
- Fedora
- Ubuntu
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.
Mailspring Features
- Unified inbox
- Multiple Account support
- Dark Mode
- Ad-free
- Support for Themes
- Email Organizer
- Extensible by Plugins/Extensions
- 28 Betterbird alternatives
- Email Client
- Calendar App
- Free • Open Source
- Windows
- Linux
- Flathub
- Mac
Betterbird is a drop-in replacement for Mozilla Thunderbird. Betterbird has more features and more fixed bugs than Thunderbird.
Betterbird Features
- Multiple Account support
- Privacy focused
- Lightweight
- Extensible by Plugins/Extensions
- Unified inbox
- Works Offline
- Spam Filter
- PGP Encryption
- No Tracking
- Ad-free
- Support for Themes
- No Coding Required
- Email Organizer
- Sync with Google Calendar
- Portable
- Calendar Integration
- Import/Export OPML Feeds
- Mail Filtering
- Full-Text Search
- OpenPGP
- Email Scheduling
- Integrated Password Manager
- Reminders
- No registration required
- 81 Claws Mail alternatives
- Email Client
- Calendar App
- Free • Open Source
- Windows
- Linux
- BSD
Claws 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 Features
- Lightweight
- Extensible by Plugins/Extensions
- Multiple Account support
- Spam Filter
- No registration required
- Ad-free
- Privacy focused
- Works Offline
- Portable
- Calendar Integration
- GPG Encryption
- Import/Export OPML Feeds
- End-to-End Encryption
Opinions about Claws Mail as a Alternative to K-9 Mail
- 80 Apple Mail alternatives
- Email Client
- Free • Proprietary
- Mac
- iPhone
- iPad
There’s big news attached. The best way to manage email on a Mac, according to Apple.
Apple Mail Features
- Email Organizer
- Multiple Account support
- Dark Mode
- Spam Filter
- 17 Shortwave alternatives
- Email Client
- Freemium • Proprietary
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Gmail
Shortwave is an email app that takes the pain out of managing your inbox, making it effortless to stay organized, productive, and responsive.
Shortwave Features
- Dark Mode
- Email Organizer
- Ad-free
- Email Scheduling
- Multiple Account support
- Support for Aliases
- No Tracking
- Calendar Integration
- Spam Filter
- Mail Filtering
- 63 Canary Mail alternatives
- Email Client
- Calendar App
- Freemium • Proprietary
- Mac
- Windows
- Android
- iPhone
- Android Tablet
- iPad
- Apple Watch
Email, meet AI. Canary can write your emails, prioritize what needs attention, silence spam & much more. Say hello to your Inbox Copilot!
Canary Mail Features
- End-to-End Encryption
- Unified inbox
- Multiple Account support
- PGP Encryption
- No Tracking
- Dark Mode
- Two-factor Authentication
- Email Organizer
- Ad-free
- Reminders
- Email template editor
- Calendar Integration
- Spam Filter
- Calendar View
- GPG Encryption
- Lightweight
- Cloud Sync
- Privacy focused
Opinions about Canary Mail as a Alternative to K-9 Mail
- 27 BlueMail alternatives
- Email Client
- Free Personal • Proprietary
- Mac
- Windows
- Linux
- Android
- iPhone
- Chrome OS
- Android Tablet
- iPad
- Apple Watch
BlueMail is a modern, mobile first, powerful Email management tool with a sleek design, unified inbox and support for all your accounts: IMAP,Exchange,POP3.
BlueMail Features
- Unified inbox
- Ad-free
- Lightweight
- Multiple Account support
- Calendar Integration
Opinions about BlueMail as a Alternative to K-9 Mail
- 35 Infomaniak kMail alternatives
- Email Client
- WebMail Provider
- Calendar App
- Freemium • Proprietary
- Online
- iPhone
- iPad
- Android
- Android Tablet
Infomaniak’s Mail Service is a secure emailing system hosted in Switzerland and is the best (free) alternative to the web giants. Infomaniak’s emailing service is used by more than a million companies and individuals throughout Europe.
Infomaniak kMail Features
- Privacy focused
- Ad-free
- Portable
- Calendar Integration
- Multiple Account support
- Cloud Sync
- Support for Aliases
- Real time collaboration