K-9 Mail

Open-source email for Android, now Thunderbird

About K-9 Mail

K-9 Mail is a free, open-source email client for Android supporting multiple accounts, unified inbox, IMAP push and OpenPGP encryption. It is developed by the Thunderbird project and is becoming Thunderbird for Android, keeping its community-driven, tracker-free approach. For everyday users and professionals alike, it offers a focused and dependable way to get this work done without complicated setup steps or bloated, expensive software suites.

K-9 Mail key facts

Category: Communication & Collaboration
Pricing: Free — listed in this directory as a free tool, with no paid plan required to use it.
Focus areas: email, android, open source
Official site: k9mail.app

About the Communication & Collaboration category

Chat, video meetings, and messaging apps that keep teams connected. The Communication & Collaboration category on Tools Hub currently lists 329 tools. Alongside K-9 Mail, it includes FairEmail, Canary Mail, Tuta Mail, StartMail.

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More in Communication & Collaboration

Comparing tools in the Communication & Collaboration category? These related listings are worth a look: FairEmail — Privacy-first Android email, fully offline capable; Canary Mail — Secure email with PGP and AI assistance; Tuta Mail — Encrypted email and calendar from Germany.