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Cyrus IMAP vs Dovecot: catalog facts
Cyrus IMAP	Dovecot
Free Free and open source.	Free Community Edition is free and open source; Dovecot Pro is a paid commercial product.
Linux, Self-hosted	Linux, Self-hosted
Mail, calendars and contacts in one server JMAP support alongside IMAP	Very widely deployed Standards-compliant IMAP and POP3
Complex to configure compared with all-in-one servers No bundled webmail	Handles mailbox access only; needs a separate MTA for sending Configuration takes mail server experience
Self-hosted	Self-hosted
Open source	Open source
License not stated	License not stated
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 24, 2026

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