mailcow vs Sup
A side-by-side comparison of two self-hosted mail servers options
— licensing, setup difficulty, resource needs, and what each one
replaces.
Not the right match-up?
Compare mailcow with
choose an app… listmonk Docker Mailserver Mailspring Postal MailHog Mail-in-a-Box Stalwart Mail Server Mautic Mailpit Mailpile Mailu Roundcube Himalaya SimpleLogin MailCatcher Maddy Mail Server Mox Mailtrain Haraka AnonAddy RainLoop imapsync smtp4dev NeoMutt Modoboa aerc Dittofeed Rspamd Keila emailwiz SendPortal SOGo WildDuck Mailvelope iRedMail Cypht SnappyMail Forward Email Cuttlefish DebOps swaks parsedmarc Cozy PostfixAdmin Dovecot Nextcloud Groupware Apache James Nextcloud Mail chasquid Betterbird imapfilter OpenTrashmail notmuch Sieve Editor meli phpList Exim alot alps Lieer Cyrus IMAP OfflineIMAP Larch OpenSMTPD Postfix ViMbAdmin Chatmail Mailman isync MailWhale Afterlogic WebMail Lite afew Apache SpamAssassin Sympa Simple NixOS Mailserver EGroupware msmtp fdm Group-Office DragonFly Mail Agent Horde Groupware Claws Mail Fetchmail DAViCal HyperKitty Kolab Groupware piler Postorius Nullmailer getmail6 OpenDMARC OpenDKIM bogofilter Citadel Schleuder Dovecot Pigeonhole Kopano Groupware Core Tine DKIMpy Milter mpop Courier Mail Server Afterlogic DAV b1gMail Dovel EmailRelay Inboxen Sendmail Sendy SquirrelMail
Compare Sup with
choose an app… listmonk Docker Mailserver Mailspring Postal MailHog Mail-in-a-Box Stalwart Mail Server Mautic Mailpit Himalaya meli alot
Feature mailcow Sup Category Mail Servers Mail Servers License GPL-3.0 GPL-2.0 Language JavaScript Ruby Setup difficulty Medium Medium Min. RAM 6,144 MB 128 MB Deployment docker binary, source GitHub stars ★ 13,245 ★ 970 First released 2016 2007 Replaces Microsoft Exchange, Google Workspace Mutt
Why pick each one
Choose mailcow if… All components preconfigured Active community mailcow details Choose Sup if… Released under the GPL-2.0 license Written in Ruby Tiny footprint — runs in 128 MB RAM Sup details
Frequently asked questions Is mailcow or Sup better? Neither is universally better. mailcow has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are mailcow and Sup free and open-source? Yes. mailcow is licensed under GPL-3.0 and Sup under GPL-2.0. Both can be self-hosted at no software cost.
Can I run mailcow and Sup with Docker? mailcow: yes. Sup: check the project docs for container support.