Courier Mail Server vs mailcow

Courier Mail Server

Figure	Courier Mail Server	mailcow
Price from	Free	€8.90/mo
Free plan	Yes	Yes
Free trial	—	—
Open source	—	—
Web	—	Yes
Linux	Yes	Yes
iOS	—	Yes
Android	—	Yes
Self-hosted	Yes	Yes
Plans published	1	7
Spec score · Mail Server Software	8.5 (#1)	8.4 (#3)
Integrations	The server can use LDAP, MySQL, or PostgreSQL-based authentication databases and supports LDAP-based mail routing.	The documentation lists client setup guides for Android, Apple macOS/iOS, eM Client, KDE Kontact, Outlook, and Thunderbird.
Mail services	Courier is an integrated mail and groupware server providing ESMTP, IMAP, POP3, webmail, and mailing list services.	Its components include Postfix for mail transfer, Dovecot for IMAP/POP, and SOGo for webmail, calendars, and contacts.
Product	Courier is an integrated mail and groupware server providing ESMTP, IMAP, POP3, webmail, and mailing list services.	mailcow: dockerized is an open-source groupware and email suite based on Docker.
Security	Courier supports STARTTLS and SSL for ESMTP, IMAP, POP3, and webmail; its ESMTP client can require a certificate signed by a trusted root CA.	Two-factor authentication options include YubiKey OTP, WebAuthn, and TOTP.
Support	The site lists an unmoderated courier-users mailing list for questions, bug reports, and comments, plus a separate read-only announcement list.	Commercial support is available through Servercow, while community support is voluntary, best-effort, and not guaranteed.

Courier Mail Server has no write-up on Specifiction yet; its figures are above.

mailcow has no write-up on Specifiction yet; its figures are above.