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Comparison · Collab
Flarum vs Mattermost
A side-by-side editorial comparison of Flarum and Mattermost — release velocity, themes, recent moves, and the top alternatives to consider.
Flarum vs Mattermost: at a glance
What is Flarum?
Flarum's 2.0 candidates are accelerating, but the feed publishes only a link per tag.
Flarum is eight release candidates into 2.0, with rc.6, rc.7, and rc.8 landing within five days after a gap of roughly seven weeks following rc.5. The feed carries no notes: each entry is a single line pointing at the CHANGELOG.md for that tag, so the content of these candidates is not visible here. The last entry with substantive text was rc.1 in April, which addressed discussion-list and notification query costs.
What is Mattermost?
Mattermost v12.1 puts bots and burn-after-reading messages under the same access rules.
Mattermost v12 shipped in parts: agents limited to the requesting user's access, Cross Guard for transfers across security domains, and user, device and channel attributes in access policy. A November 9 partnership pairs v12 with Arqit's quantum-safe device trust. v12.1 on November 13 extends attribute-based access control to bot accounts and to Burn-on-Read permissions, and Desktop v6.4 fixes Boards on subpath deployments.
Flarum vs Mattermost: editorial side-by-side
Flarum
5.0COLLAB
Flarum's 2.0 candidates are accelerating, but the feed publishes only a link per tag.
◆ Current state
Flarum is eight release candidates into 2.0, with rc.6, rc.7, and rc.8 landing within five days after a gap of roughly seven weeks following rc.5. The feed carries no notes: each entry is a single line pointing at the CHANGELOG.md for that tag, so the content of these candidates is not visible here. The last entry with substantive text was rc.1 in April, which addressed discussion-list and notification query costs.
◆ Where it's heading
Tempo is the only signal this feed supports, and it has clearly changed: three candidates in five days after seven quiet weeks reads as convergence on a final rather than continued development. What is actually changing between candidates cannot be determined from this source without following the linked changelog.
◆ Prediction
A 2.0.0 final looks near given the candidate cadence, but this feed will not say what it contains.
Mattermost
6.3COLLAB
Mattermost v12.1 puts bots and burn-after-reading messages under the same access rules.
◆ Current state
Mattermost v12 shipped in parts: agents limited to the requesting user's access, Cross Guard for transfers across security domains, and user, device and channel attributes in access policy. A November 9 partnership pairs v12 with Arqit's quantum-safe device trust. v12.1 on November 13 extends attribute-based access control to bot accounts and to Burn-on-Read permissions, and Desktop v6.4 fixes Boards on subpath deployments.
◆ Where it's heading
Each release closes another gap in one policy model for who and what can see a message: people, devices, channels, and now automation accounts and ephemeral messages. The audience stays defence and regulated buyers, and point releases are filling in v12 rather than starting new lines.
◆ Prediction
Further v12.x releases likely apply the same attribute rules to more objects, such as files, plugins or AI agent actions, following the pattern of v12.1.
Alternatives to Flarum 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 Flarum or Mattermost.
Nextcloud
Nextcloud's November patches lean on preview speed and sharing fixes across three branches.
Asana
Asana lets Division admins run their own custom roles, on top Enterprise plans only.
Double
Double turns a recorded Chrome session into an agent that repeats the task.
SiYuan
SiYuan 3.8.11 alphas add freeform mind maps and plugin snapshots right after 3.8.10.
Hive
Hive turns reporting into a planning tool: shared inputs, grouped values, per-person drill-downs.
See all Flarum alternatives → · See all Mattermost alternatives →
Recent activity from Flarum and Mattermost
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 23h agoMattermostMattermost v12.1: Control That Goes Beyond On and Off
- 4d agoMattermostYour MFA Isn't Phishing-Resistant. Here's What Is, and What the Deployment Decision Actually Involves
- 4d agoMattermostMattermost v12 pairs with Arqit for quantum-safe edge deployments
- 9d agoMattermostMattermost v12 adds device and channel attributes to access policy
- 18d agoMattermostMattermost v12 Cross Guard: managed cross-domain transfers
- 21d agoMattermostMattermost v12: Agents Are Doing the Work. Now Control What They Can See. ⚡
- 2mo agoFlarumv2.0.0-rc.8
- 2mo agoFlarumFlarum 2.0 release candidate 7
- 2mo agoFlarumFlarum 2.0 release candidate 6
- 4mo agoFlarumFlarum 2.0 release candidate 5
- 4mo agoFlarumFlarum 2.0 release candidate 4
- 5mo agoFlarumFlarum 2.0 release candidate 3
Frequently asked questions
What is the difference between Flarum and Mattermost?
They serve adjacent needs but don't currently overlap on shipped themes. Mattermost 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 Flarum 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 5.0), 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 Flarum?
Top Flarum alternatives in Collab are ranked by recent ship velocity. Browse the "Flarum alternatives" section above for the current picks, or visit /alternatives/flarum 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.