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SnappyMail vs Cypht: catalog facts
SnappyMail	Cypht
Free Free and open source.	Free Free and open source under the LGPL v2.1.
Web, Self-hosted	Web, Self-hosted
Very small download and fast loading on mobile Maintained successor to RainLoop	Unified views across many email accounts Supports IMAP, JMAP and Exchange EWS
Requires your own web server and mail server Drops support for older browsers	Needs a PHP server or Docker to run Less polished than commercial webmail
Self-hosted	Self-hosted
Open source	Open source
License: AGPL-3.0	License: LGPL-2.1
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
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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