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Comparison · Comms
mailcow vs Session
A side-by-side editorial comparison of mailcow and Session — release velocity, themes, recent moves, and the top alternatives to consider.
mailcow vs Session: 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 Session?
Session survived its funding scare; now Pro is on hold and Protocol v2 is the bet.
Session's 2026 started with a cofounder's appeal warning the project might not continue, followed in June by news that community support had restored its runway. Since then the feed has tracked Session Pro: release preparation in August, a proposed change to Pro's tokenomics, a beta submitted to app stores in September, then in October a pause on the Pro launch while talks with an allied privacy ecosystem continue. Infrastructure work continued, with lighter Session Node software in mid-October.
mailcow vs Session: 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.
Session
5.0COMMS
Session survived its funding scare; now Pro is on hold and Protocol v2 is the bet.
◆ Current state
Session's 2026 started with a cofounder's appeal warning the project might not continue, followed in June by news that community support had restored its runway. Since then the feed has tracked Session Pro: release preparation in August, a proposed change to Pro's tokenomics, a beta submitted to app stores in September, then in October a pause on the Pro launch while talks with an allied privacy ecosystem continue. Infrastructure work continued, with lighter Session Node software in mid-October.
◆ Where it's heading
Protocol v2, adding forward secrecy, post-quantum encryption and better linked-device handling, is now the main technical thread, with an invite-only alpha planned. Pro's monetisation model is in flux, so the revenue side remains unresolved.
◆ Prediction
Unclear whether Pro launches in its current form; the next concrete step is more likely a Protocol v2 alpha announcement.
Alternatives to mailcow and Session
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 Session.
VerneMQ
VerneMQ follows its year-in-the-making 2.2.0 with a quick round of subscription fixes.
Misskey
Misskey moves to Sentry v11 and keeps shipping security fixes in its monthly releases.
Apprise
Apprise 2 is out: notify() returns a result object, and 2.1 takes the catalog to 170 services.
RSS.com
RSS.com's changelog is back after ten months, with listener voicemail for podcasts.
The Lounge
The Lounge ships steadily but publishes release notes that say nothing.
See all mailcow alternatives → · See all Session alternatives →
Recent activity from mailcow and Session
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 12d agomailcow🎃🐮 Mooctober 2026 | Security Update: PHP 8.2.35, SOGo 5.12.12 & Nginx 1.30.6
- 14d agoSessionSmaller nodes, stronger encryption: Oxen 11.7, Storage Server 2.12 and Session Router 1.1
- 20d agoSessionSession Protocol v2: An Update on PFS, Post-Quantum and Linked Devices
- 25d agoSessionSession is taking part in Octant's Epoch 13 privacy round
- 27d agomailcow2026-09a: Rspamd 4.2.1 and postfix-tlspol bumps
- 27d agoSessionDevelopment Update - Stability Fixes and Network Improvements
- 1mo agomailcow🍂🐮 Mootember 2026 | Unbound 1.26.1, SOGo 5.12.11 & Redis 7.4.11
- 2mo agoSessionSession Pro beta submitted to app stores
- 2mo agoSessionA proposed change to Session Pro's tokenomics
- 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 Session?
They serve adjacent needs but don't currently overlap on shipped themes. mailcow and Session 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 mailcow better than Session?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. mailcow and Session 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 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 Session?
Top Session alternatives in Comms are ranked by recent ship velocity. Browse the "Session alternatives" section above for the current picks, or visit /alternatives/session for the full list with editorial commentary on each.