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Open Source Fastmail Alternatives

Discover 5 open source alternatives to Fastmail. All free, community-driven, and actively maintained.

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What is Fastmail?

Fastmail is a fast, secure, and privacy-focused email service with advanced features.

Visit Fastmail
tutanota
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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.

Email
roundcubemail
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roundcubemail

The Roundcube Webmail suite

Webmail Client
iRedMail
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iRedMail

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

Email
snappymail
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snappymail

Simple, modern & fast web-based email client

Web-based Email Client
cypht
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cypht

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

Email