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Open Source Email Clients using Java

A curated collection of the best open source desktop, mobile, and web applications for reading and managing email, with multi-account support, search, and encryption. using Java.

Thunderbird for Android

Privacy-first email app for Android, no ads ever

  • Stars

    14,166

  • Last commit

    19 hours ago

  • License

    Apache-2.0
Android email client from the Thunderbird project with unified inbox, multiple account support, OpenPGP encryption, and no ads or data tracking.

Open Source Alternative to:

Gmail

Twake Mail

Secure open source email with advanced encryption & AI

  • Stars

    665

  • Last commit

    14 hours ago

  • License

    AGPL-3.0
Open source professional email solution with PGP encryption, JMAP protocol, AI-powered responses, and advanced antispam protection. Control your data privately.

Open Source Alternative to:

Gmail
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