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Open Source Email Clients using Kotlin

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 Kotlin.

Macro Mail

Keyboard-first email client with AI, chat, and tasks

  • Stars

    Stars growing quickly over the last 30 days4,872

  • Last commit

    11 hours ago

  • License

    AGPL-3.0
An AI-powered email client that combines inbox management, chat, tasks, and AI agents in one shared workspace, built for keyboard-driven workflows.

Open Source Alternative to:

Gmail

Twake Mail

Secure open source email with advanced encryption & AI

  • Stars

    660

  • Last commit

    19 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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