About
K-9 Mail is an open source email client that works with virtually every email provider. It supports multiple accounts, unified inbox, automatic background synchronization, push notifications, and local and server-side search. The app is privacy-friendly with no tracking and only connects to your email provider. For encrypted email, install OpenKeychain to use OpenPGP encryption with K-9 Mail.
Highlights
- Multiple account support with unified inbox view
- OpenPGP email encryption via OpenKeychain integration
- Automatic background sync and push notifications
- Local and server-side search across emails
- Privacy-focused with no tracking or third-party connections
Best for
Users seeking a privacy-respecting email client that supports multiple accounts across different providers without tracking or data collection.
At a glance
K-9 Mail is available on Android — all free to download.
It is developed by K-9 Dog Walkers.
Screenshots
Frequently Asked Questions
- Is K-9 Mail free?
- Yes — K-9 Mail is free to download on Android.
- What platforms is K-9 Mail available on?
- K-9 Mail is available on Android.
- What is K-9 Mail?
- K-9 Mail is an open source email client for Android that works with virtually every email provider. It offers multiple account support, unified inbox, automatic synchronization, push notifications, and optional OpenPGP encryption.
- Does K-9 Mail support email encryption?
- Yes. K-9 Mail supports OpenPGP email encryption (PGP/MIME). To encrypt and decrypt emails, install the OpenKeychain app alongside K-9 Mail.
- Does K-9 Mail track user data?
- No. K-9 Mail is privacy-friendly with no tracking whatsoever. It only connects to your email provider.
- Can I use K-9 Mail with multiple email accounts?
- Yes. K-9 Mail supports multiple accounts and includes a unified inbox feature to view all your emails in one place.
- What are the alternatives to K-9 Mail?
- K-9 Mail is similar to Proton Mail - Encrypted Email, Proton Authenticator, Mullvad VPN, and Thunderbird: Free Your Inbox. Browse related apps by tag: open source, email client, and encryption.
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