Open-source alternatives to Gmail

Open-source email client for Android. — Thunderbird for Android – Open Source Email App for Android (fka K-9 Mail)

↔ alternative to Gmail

An open-source AI email client and app. — Experience email the way you want with Mail0 – the first open source email app that puts your privacy and safety first. Join the discord: https://mail0.link/discord

↔ alternative to Gmail

End-to-end encrypted email with calendar and contacts — Tuta is an email service with a strong focus on security and privacy that lets you encrypt emails, contacts and calendar entries on all your devices.

↔ alternative to Gmail、Outlook、ProtonMail

Web clients for Proton Mail and Calendar. — Monorepo hosting the proton web clients

↔ alternative to Gmail

A privacy-focused email client for Android. — Fully featured, open source, privacy friendly email app for Android

↔ alternative to Gmail

Proton Mail Android email client app — Proton Mail Android app

↔ alternative to Gmail

Encrypted email forwarding and marketing platform. — Privacy-focused encrypted email for everyone. All-in-one alternative to Gmail + Mailchimp + Sendgrid.

↔ alternative to Gmail、Mailchimp

Encrypted email client for iOS. — Secure email that protects your privacy

↔ alternative to Gmail

Email client that turns your inbox into a kanban board. — 📥 Turn your inbox into a kanban board.

↔ alternative to Gmail

Self-hosted webmail client for Stalwart Mail Server. — Self-hosted JMAP webmail for Stalwart Mail Server. Mail, calendar, contacts, and files in one client.

↔ alternative to Gmail

Open source email client for iOS. — Thunderbird for iOS – Open Source Email App for iOS

↔ alternative to Gmail

Proton Mail client for Android. — Proton Mail Android app

↔ alternative to Gmail