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Nextcloud MailSnappyMail
Free

Free and open source; installed as an app on a Nextcloud server.

 Free

Free and open source.

Web, Self-hosted Web, Self-hosted
  • Runs on your own Nextcloud server
  • Works with existing IMAP accounts
  • Very small download and fast loading on mobile
  • Maintained successor to RainLoop
  • Needs a working Nextcloud installation
  • Does not host mailboxes itself
  • Requires your own web server and mail server
  • Drops support for older browsers
Self-hosted Self-hosted
Open source Open source
License not stated License: AGPL-3.0
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 24, 2026

Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.