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Comparison · Collab
CoScreen vs Mattermost
A side-by-side editorial comparison of CoScreen and Mattermost — release velocity, themes, recent moves, and the top alternatives to consider.
CoScreen vs Mattermost: at a glance
What is CoScreen?
CoScreen ships its final build and declares End of Life after a year of quiet.
CoScreen just shipped V8.11.14, explicitly labeled its final software update, alongside an official End of Life announcement. The last real feature release was V8.10 in August 2025 (screen-region sharing plus macOS Tahoe support); the eleven months since produced nothing but this shutdown notice. The multiplayer, multi-window screen-sharing tool for remote teams is being retired rather than iterated.
What is Mattermost?
Mattermost v12 adds device and channel attributes to its access policies.
Mattermost v12 has arrived in three parts: agents that act with the requesting user's access and leave audit trails, Cross Guard for managed transfers across security domains, and now policy attributes that describe the user, device and channel. Access rules can evaluate the situation of a request, not just the identity behind it. The audience is defense and regulated buyers.
CoScreen vs Mattermost: editorial side-by-side
CoScreen
3.8COLLAB
CoScreen ships its final build and declares End of Life after a year of quiet.
◆ Current state
CoScreen just shipped V8.11.14, explicitly labeled its final software update, alongside an official End of Life announcement. The last real feature release was V8.10 in August 2025 (screen-region sharing plus macOS Tahoe support); the eleven months since produced nothing but this shutdown notice. The multiplayer, multi-window screen-sharing tool for remote teams is being retired rather than iterated.
◆ Where it's heading
The cadence tells the story: steady usability and performance work through 2024 and into early 2025, a last genuine feature drop in August 2025, then silence until today's EOL. This is a sunset, not a pivot. Users can expect the app to keep running on 8.11.14 but to receive no further fixes or OS-compatibility updates.
◆ Prediction
With EOL declared and a final build shipped, the only moves left are wind-down mechanics: a hard shutdown date, export or migration guidance, and eventual removal from distribution. No further feature work is coming.
Mattermost
6.3COLLAB
Mattermost v12 adds device and channel attributes to its access policies.
◆ Current state
Mattermost v12 has arrived in three parts: agents that act with the requesting user's access and leave audit trails, Cross Guard for managed transfers across security domains, and now policy attributes that describe the user, device and channel. Access rules can evaluate the situation of a request, not just the identity behind it. The audience is defense and regulated buyers.
◆ Where it's heading
After five weeks of zero-trust and resilience essays, Mattermost is shipping the controls those essays described, one v12 component per post. Policy attributes tie the agent permissions and Cross Guard pieces into a single access model.
◆ Prediction
Expect further v12 component posts or a point release with configuration details; the entries so far are announcements with little technical depth, so the rollout schedule is unclear.
Alternatives to CoScreen and Mattermost
Other Collab 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 CoScreen or Mattermost.
LibrePhotos
LibrePhotos 1.6 redesigns the app and admits its Docker images sent usage data to Microsoft.
Radarr
Radarr's 7.0 pre-release line now shows every audio and subtitle stream per file.
Interact
Interact opens its intranet to outside AI assistants and uses Claude to attack its own platform.
GitLab
GitLab sells Orbit as the evidence layer for agent pilots and AI-code rules.
AFFiNE
AFFiNE's canaries fix CalDAV setup and a list-ordering bug.
See all CoScreen alternatives → · See all Mattermost alternatives →
Recent activity from CoScreen and Mattermost
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 5d agoMattermostMattermost v12 adds device and channel attributes to access policy
- 14d agoMattermostMattermost v12 Cross Guard: managed cross-domain transfers
- 17d agoMattermostMattermost v12: Agents Are Doing the Work. Now Control What They Can See. ⚡
- 27d agoMattermostWhere the Response Team Talks After the Gateway Falls
- 1mo agoMattermostTwo Outages, One Vendor, One Lesson in Resilience Planning
- 1mo agoMattermostThe Conversation Is the Operation: Defending Collaboration Infrastructure Like an Intelligence Asset
- 4mo agoCoScreenV8.11.14 Final Software Update ⚡
- 1y agoCoScreenV8.10 Screen Region Sharing & macOS Tahoe Support
- 1y agoCoScreenV8.2.119 New remote window top bar and focus mode
- 2y agoCoScreenV8.1.57 New video layouts and open URLs of shared browser windows
- 2y agoCoScreenV7.10.144: Update for enterprise access
- 2y agoCoScreenV7.10.41: Bug fixes
Frequently asked questions
What is the difference between CoScreen and Mattermost?
They serve adjacent needs but don't currently overlap on shipped themes. Mattermost is currently shipping more aggressively (velocity 6.3 vs 3.8), 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 CoScreen better than Mattermost?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Mattermost is currently shipping more aggressively (velocity 6.3 vs 3.8), with 1 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Collab products to evaluate alongside.
What are the best alternatives to CoScreen?
Top CoScreen alternatives in Collab are ranked by recent ship velocity. Browse the "CoScreen alternatives" section above for the current picks, or visit /alternatives/coscreen for the full list with editorial commentary on each.
What are the best alternatives to Mattermost?
Top Mattermost alternatives in Collab are ranked by recent ship velocity. Browse the "Mattermost alternatives" section above for the current picks, or visit /alternatives/mattermost for the full list with editorial commentary on each.