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Comparison · Comms
Brosix vs mailcow
A side-by-side editorial comparison of Brosix and mailcow — release velocity, themes, recent moves, and the top alternatives to consider.
Brosix vs mailcow: at a glance
What is Brosix?
At 20, Brosix steps beyond internal chat into external communities and mobile calling.
Brosix is a 20-year-old team-messaging platform that markets itself on stability and simplicity, and its recent output mixes anniversary content with steady capability catch-up. The two substantive moves are private channels and communities that open the tool to clients and partners rather than just internal teams, and audio/video calling on iOS and Android. Around them sit fixed-price Essentials plans for small teams, a Pipedream automation integration, and a new partner referral program.
What is mailcow?
mailcow's release notes are almost entirely upstream security currency.
mailcow ships named seasonal releases with lettered revisions, and nearly every revision exists to pull in an upstream security fix - Redis, ClamAV, SOGo, Rspamd, nginx, unbound, Postfix. Revision B of the Mooly 2026 release updates Redis 7.4.10, ClamAV 1.4.6, and SOGo 5.12.10, adds minor web UI and nginx hardening, and removes a legacy DeltaChat sieve rule. The last release with genuinely new features was the March cut, which added forced 2FA, ACME DNS-01 challenges, and a passwordless autodiscover endpoint.
Brosix vs mailcow: editorial side-by-side
Brosix
5.0COMMS
At 20, Brosix steps beyond internal chat into external communities and mobile calling.
◆ Current state
Brosix is a 20-year-old team-messaging platform that markets itself on stability and simplicity, and its recent output mixes anniversary content with steady capability catch-up. The two substantive moves are private channels and communities that open the tool to clients and partners rather than just internal teams, and audio/video calling on iOS and Android. Around them sit fixed-price Essentials plans for small teams, a Pipedream automation integration, and a new partner referral program.
◆ Where it's heading
Brosix is pushing past its internal-messaging roots on two fronts, extending communication to external stakeholders and closing mobile feature gaps, while using fixed-price SMB plans and integrations to defend its small and mid-team niche against Slack and Teams. The cadence is modest and the framing conservative, but the direction is widening the surface beyond internal chat.
◆ Prediction
Expect Brosix to keep filling mobile-to-desktop parity gaps and to build out the channels and communities capability with moderation and membership controls as it leans into external-facing use cases; the anniversary promotions point to a retention push through mid-2026.
mailcow
5.0COMMS
mailcow's release notes are almost entirely upstream security currency.
◆ Current state
mailcow ships named seasonal releases with lettered revisions, and nearly every revision exists to pull in an upstream security fix - Redis, ClamAV, SOGo, Rspamd, nginx, unbound, Postfix. Revision B of the Mooly 2026 release updates Redis 7.4.10, ClamAV 1.4.6, and SOGo 5.12.10, adds minor web UI and nginx hardening, and removes a legacy DeltaChat sieve rule. The last release with genuinely new features was the March cut, which added forced 2FA, ACME DNS-01 challenges, and a passwordless autodiscover endpoint.
◆ Where it's heading
For a self-hosted mail stack that bundles a dozen upstream components, keeping current with their CVEs is the product, and mailcow has organized its release cadence around exactly that. The pattern is consistent: a named release with some feature content every few months, then lettered revisions that are pure security currency plus small web UI escaping and validation fixes. The web interface is where mailcow's own code gets hardened - HTML escaping in quarantine views and sieve editors recurs across several revisions.
◆ Prediction
Expect the next entry to be another lettered revision carrying upstream updates, with the next named release likely bundling whatever feature work has accumulated since March.
Alternatives to Brosix and mailcow
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 Brosix or mailcow.
Proton Bridge
Proton Bridge spends its first release in ten weeks on crashes, memory bounds and dead code
Stalwart
Stalwart is chasing mail RFCs and its own storage layer at the same time
Mux
Every manual control Mux ships now arrives with a Robots workflow that does it for you
Netcore Cloud
Netcore's feed remains a demand-generation channel; ten entries, zero product releases.
Openfire
Openfire keeps its XMPP server current without changing what it is.
See all Brosix alternatives → · See all mailcow alternatives →
Recent activity from Brosix and mailcow
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agomailcow🏖️🐮 Mooly 2026 | Postfix 3.10.12, Rspamd 4.1.0 & Nginx 1.30.3 - Revision B
- 20d agomailcow🏖️🐮 Mooly 2026 | Postfix 3.10.12, Rspamd 4.1.0 & Nginx 1.30.3 - Revision A
- 1mo agomailcow🏖️🐮 Mooly 2026 | Postfix 3.10.12, Rspamd 4.1.0 & Nginx 1.30.3
- 2mo agoBrosixBrosix Turns 20: Two Decades of Keeping Team Communication Simple
- 2mo agomailcowThird May revision: unbound CVE and nginx 1.30.2
- 3mo agomailcowSecond May revision: quarantine table HTML escaping
- 3mo agomailcowSOGo 5.12.8 covering four upstream security issues
- 3mo agoBrosixAudio and Video Calls Are Now Available on Brosix Mobile Apps
- 4mo agoBrosixNew in Brosix: Build Private Channels and Communities — for Teams, Clients, and Partners ⚡
- 5mo agoBrosixTurn Recommendations Into Passive Income with the Brosix Partner Program
- 6mo agoBrosixBrosix plans for 2026
- 9mo agoBrosixCelebrate 20 Years of Brosix – Get 1 Extra Month Free for Sharing Your Review
Frequently asked questions
What is the difference between Brosix and mailcow?
They serve adjacent needs but don't currently overlap on shipped themes. Brosix and mailcow are shipping at a similar cadence (velocity 5.0 vs 5.0, both within Sparkpulse's "active" band). See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Brosix better than mailcow?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Brosix and mailcow are shipping at a similar cadence (velocity 5.0 vs 5.0, both within Sparkpulse's "active" band). For your specific use case, the alternatives sections above list other Comms products to evaluate alongside.
What are the best alternatives to Brosix?
Top Brosix alternatives in Comms are ranked by recent ship velocity. Browse the "Brosix alternatives" section above for the current picks, or visit /alternatives/brosix for the full list with editorial commentary on each.
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.