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Comparison · Comms
mailcow vs Rocket.Chat
A side-by-side editorial comparison of mailcow and Rocket.Chat — release velocity, themes, recent moves, and the top alternatives to consider.
Shared themes:self-hosted
mailcow vs Rocket.Chat: at a glance
What is mailcow?
mailcow's monthly releases are mostly upstream security updates with small UI work
mailcow ships named monthly releases with lettered revisions, and most exist to pull in upstream security fixes for components like SOGo, Nginx, Redis, Unbound and Rspamd. The September release also added an ACL and global switch to stop external alias forwarding, a show-password toggle on login pages, and fixes such as an auth-cache wipe during nginx outages. October moved PHP to an Alpine 3.24 base and brought SOGo 5.12.12, Nginx 1.30.6 and a UI update.
What is Rocket.Chat?
Rocket.Chat 9.0 puts LDAP, SAML and Custom OAuth behind a plan and removes seven logins.
The 9.0 candidate line opened on 27 October, and its lead is a licensing change: LDAP, SAML and Custom OAuth now require a premium plan, and seven login providers are removed, including Facebook, LinkedIn and X. rc.0 also drops anonymous write, the Atlassian Crowd integration, Gravatar and the raw MongoDB query parameters, while rc.3 moves REST refusals to a single 403 shape. 8.9.0 LTS, dated 5 October, is supported until 31 October 2027.
mailcow vs Rocket.Chat: editorial side-by-side
mailcow
5.0COMMS
mailcow's monthly releases are mostly upstream security updates with small UI work
◆ Current state
mailcow ships named monthly releases with lettered revisions, and most exist to pull in upstream security fixes for components like SOGo, Nginx, Redis, Unbound and Rspamd. The September release also added an ACL and global switch to stop external alias forwarding, a show-password toggle on login pages, and fixes such as an auth-cache wipe during nginx outages. October moved PHP to an Alpine 3.24 base and brought SOGo 5.12.12, Nginx 1.30.6 and a UI update.
◆ Where it's heading
Keeping a dozen bundled upstreams current is the product, and the cadence is built around that. Feature work arrives in small admin and web UI controls alongside the security updates.
◆ Prediction
Expect a revision of the October release carrying further upstream updates, following the lettered-revision pattern.
Rocket.Chat
6.3COMMS
Rocket.Chat 9.0 puts LDAP, SAML and Custom OAuth behind a plan and removes seven logins.
◆ Current state
The 9.0 candidate line opened on 27 October, and its lead is a licensing change: LDAP, SAML and Custom OAuth now require a premium plan, and seven login providers are removed, including Facebook, LinkedIn and X. rc.0 also drops anonymous write, the Atlassian Crowd integration, Gravatar and the raw MongoDB query parameters, while rc.3 moves REST refusals to a single 403 shape. 8.9.0 LTS, dated 5 October, is supported until 31 October 2027.
◆ Where it's heading
Calling keeps maturing on its own track: rc.1 adds a noise cancellation choice to native LiveKit calls, with RNNoise served by the workspace itself. The bigger change sorts the install base. Community workspaces keep local login plus Google, GitHub, GitLab, Apple and Nextcloud, while directory sign-in moves to paid plans, with a free Starter plan for eligible organizations of up to 50 users. The rest of 9.0 reads as a clean-up, collecting deprecations announced in 8.9 and breaking REST clients that read the old error codes.
◆ Prediction
Expect more fix-and-bump candidates before 9.0.0 goes final, since rc.2 was a bare bump and rc.3 is mostly error-shape changes. How many Community workspaces hit the login change at upgrade is unclear; the notes already point admins to recovery steps.
Alternatives to mailcow and Rocket.Chat
Other Comms products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either mailcow or Rocket.Chat.
Element iOS
Element Classic now asks its own users to move to Element X, if their server opts in.
Brosix
Brosix follows its communities launch with a referral push and a private-room how-to.
VerneMQ
VerneMQ follows its year-in-the-making 2.2.0 with a quick round of subscription fixes.
Session
Session survived its funding scare; now Pro is on hold and Protocol v2 is the bet.
Misskey
Misskey moves to Sentry v11 and keeps shipping security fixes in its monthly releases.
See all mailcow alternatives → · See all Rocket.Chat alternatives →
Recent activity from mailcow and Rocket.Chat
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 2d agoRocket.Chat9.0 rc.3: REST refusals become 403; /hooks status codes change
- 3d agoRocket.Chat9.0 rc.2: version bump only
- 5d agoRocket.Chat9.0 rc.1: noise cancellation choice for LiveKit calls
- 6d agoRocket.Chat9.0 rc.0: LDAP, SAML and Custom OAuth become premium-only ⚡
- 12d agomailcow🎃🐮 Mooctober 2026 | Security Update: PHP 8.2.35, SOGo 5.12.12 & Nginx 1.30.6
- 25d agoRocket.Chat8.9.0 LTS: 12-month support, Deno removed, hybrid AI Search
- 27d agomailcow2026-09a: Rspamd 4.2.1 and postfix-tlspol bumps
- 1mo agoRocket.Chat8.9 rc.5: version bump only
- 1mo agomailcow🍂🐮 Mootember 2026 | Unbound 1.26.1, SOGo 5.12.11 & Redis 7.4.11
- 2mo agomailcow🏖️🐮 Mooly 2026 | Postfix 3.10.12, Rspamd 4.1.0 & Nginx 1.30.3 - Revision B
- 3mo agomailcow🏖️🐮 Mooly 2026 | Postfix 3.10.12, Rspamd 4.1.0 & Nginx 1.30.3 - Revision A
- 3mo agomailcow🏖️🐮 Mooly 2026 | Postfix 3.10.12, Rspamd 4.1.0 & Nginx 1.30.3
Frequently asked questions
What is the difference between mailcow and Rocket.Chat?
Both compete on the same themes — self-hosted — within Comms. Rocket.Chat is currently shipping more aggressively (velocity 6.3 vs 5.0), with 1 editorial sparks in the last 30 days against 0. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is mailcow better than Rocket.Chat?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Rocket.Chat is currently shipping more aggressively (velocity 6.3 vs 5.0), with 1 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Comms products to evaluate alongside.
What are the best alternatives to mailcow?
Top mailcow alternatives in Comms are ranked by recent ship velocity. Browse the "mailcow alternatives" section above for the current picks, or visit /alternatives/mailcow for the full list with editorial commentary on each.
What are the best alternatives to Rocket.Chat?
Top Rocket.Chat alternatives in Comms are ranked by recent ship velocity. Browse the "Rocket.Chat alternatives" section above for the current picks, or visit /alternatives/rocketchat for the full list with editorial commentary on each.