OpenSourceProjects

Open Source ProtonMail Alternatives

Discover 9 open source alternatives to ProtonMail. All free, community-driven, and actively maintained.

What is ProtonMail?

Encrypted email service that provides secure, private email communications with end-to-end encryption.

Visit ProtonMail

awesome-selfhosted

awesome-selfhosted

A list of Free Software network services and web applications which can be hosted on your own servers

stalwart

stalwart

All-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV).

tutanota

tutanota

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.

roundcubemail

roundcubemail

The Roundcube Webmail suite

Peergos

Peergos

A p2p, secure file storage, social network and application protocol

RetroShare

RetroShare

RetroShare is a Free and Open Source cross-platform, Friend-2-Friend and secure decentralised communication platform.

iRedMail

iRedMail

Full-featured, open source mail server solution for mainstream Linux/BSD distributions.

snappymail

snappymail

Simple, modern & fast web-based email client

Web-based Email Client

cypht

cypht

Cypht: Lightweight Open Source webmail aggregator [PHP, JS]. Supports IMAP/SMTP, JMAP and EWS (Exchange Web Services)