Side by side
Astroid vs K-9 Mail
Both stand on email clients. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan LinuxMacWindows
Astroid offers a customizable graphical front end for a notmuch-based mail setup. Its reliance on separate programs and source-build instructions makes it better suited to users willing to configure their own mail stack.
Visit Astroid
Free plan Android
K-9 Mail provides a broad Android email feature set without a charge, including unified account handling, offline access, and encrypted-mail support. Its Android-only scope, absent calendar and scheduling tools, and outdated manual are important limitations.
Visit K-9 MailThe facts
| Astroid | K-9 Mail | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Linux, Mac, Windows | Android |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 1 | 1 |
| Maker | Not published | Not published |
| Website | astroidmail.github.io | k9mail.app |
| On email clients | #80 of 142 | #76 of 142 |
Astroid: what it does well
- Free and open source
- Keyboard-operable interface
- Threads and tags organize email
- Inline HTML and attachment display
- Python and Lua plugins supported
What to know first
- Requires other programs for mail transport
- Configuration varies by provider
- Gmail needs special configuration
- Builds from source with CMake
K-9 Mail: what it does well
- Free Android email client
- Unified inbox for multiple accounts
- Local and server-side search
- Offline access available
- OpenPGP support with OpenKeychain
What to know first
- Android-only platform
- No calendar tools
- No scheduled sending
- Current user manual abandoned
Alternatives to Astroid Alternatives to K-9 Mail The whole list