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Comparison · Collab
Mattermost vs Memos
A side-by-side editorial comparison of Mattermost and Memos — release velocity, themes, recent moves, and the top alternatives to consider.
Shared themes:self-hosted
Mattermost vs Memos: at a glance
What is Mattermost?
Mattermost v12 puts user-scoped permissions, private models and audit trails on every agent action.
Mattermost's feed spent five weeks on security and resilience essays; the last product release was v11.11's data-spillage exposure report. v12 changes that: agents now act with the requesting user's access rather than a shared service account, can run on private models, and leave an audit trail per action. The announcement is short on detail, but the pitch is clear and aimed at defense and regulated buyers.
What is Memos?
Memos adds collaborative Spaces without handing administrators the keys to everyone's notes.
Memos is a self-hosted memo archive that has spent three release candidates rebuilding its foundations rather than its surface. 0.27 embedded an MCP server in the instance, 0.30 flipped undeclared instances to private mode and regenerated that MCP surface from the OpenAPI schema, and 0.31.0-rc.1 now introduces first-class Spaces with ADMIN and USER memberships. The ownership model was rewritten alongside it: instance administrators are no longer implicit collaborators on other people's memos.
Mattermost vs Memos: editorial side-by-side
Mattermost
6.3COLLAB
Mattermost v12 puts user-scoped permissions, private models and audit trails on every agent action.
◆ Current state
Mattermost's feed spent five weeks on security and resilience essays; the last product release was v11.11's data-spillage exposure report. v12 changes that: agents now act with the requesting user's access rather than a shared service account, can run on private models, and leave an audit trail per action. The announcement is short on detail, but the pitch is clear and aimed at defense and regulated buyers.
◆ Where it's heading
The essays on zero trust, data spillage and out-of-band response were building toward this. Mattermost is positioning its AI agents as governed, mission-safe tools inside its classified-environment niche rather than competing on agent breadth. The in-house Matty Code agent shows it also uses agents to build the product itself.
◆ Prediction
Expect v12.x follow-ups that publish admin controls and audit-log detail for agent actions, plus more deployment-focused content aimed at defense buyers.
Memos
3.8COLLAB
Memos adds collaborative Spaces without handing administrators the keys to everyone's notes.
◆ Current state
Memos is a self-hosted memo archive that has spent three release candidates rebuilding its foundations rather than its surface. 0.27 embedded an MCP server in the instance, 0.30 flipped undeclared instances to private mode and regenerated that MCP surface from the OpenAPI schema, and 0.31.0-rc.1 now introduces first-class Spaces with ADMIN and USER memberships. The ownership model was rewritten alongside it: instance administrators are no longer implicit collaborators on other people's memos.
◆ Where it's heading
The direction runs from one person's notebook toward shared, agent-addressable infrastructure, and the order matters — access control and a stable API surface landed before multi-user sharing did. Each candidate has carried its breaking changes rather than deferring them: Shortcuts became Saved Views across the API, MCP tools and web routes, reactions lost content_id, S3 attachments stopped returning presigned URLs, and the Explore and per-user RSS feeds now return 404. Memos is willing to spend client compatibility to keep the data model coherent.
◆ Prediction
Expect 0.31 to reach a stable release with migration guidance for the Saved Views rename, and for Space scoping to extend next to the surfaces the notes say stay global — Archived, Inbox, profiles and Settings.
Alternatives to Mattermost and Memos
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 Mattermost or Memos.
KACE
KACE extends its PHP2SHELL fix to the SDA deployment appliance, six days after disclosure.
GitHub
GitHub adds GPT-6.1 Terra to Copilot and makes assisted permissions GA across CLI, app and VS Code.
AFFiNE
AFFiNE's canaries stay on upkeep: a Swift Collections bump follows CVE and migration fixes.
Teable
Teable's Structured Query v2 now reports across multi-hop relations, with a strict mode against SQL.
Readwise
Readwise splits its bundle into Reader-only and Highlights-only plans and renames its first app.
See all Mattermost alternatives → · See all Memos alternatives →
Recent activity from Mattermost and Memos
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 2d agoMattermostMattermost v12 Cross Guard: managed cross-domain transfers
- 5d agoMattermostMattermost v12: Agents Are Doing the Work. Now Control What They Can See. ⚡
- 14d agoMattermostWhere the Response Team Talks After the Gateway Falls
- 22d agoMattermostThe Conversation Is the Operation: Defending Collaboration Infrastructure Like an Intelligence Asset
- 22d agoMattermostTwo Outages, One Vendor, One Lesson in Resilience Planning
- 22d agoMattermostOur Newest Top Contributor Is an AI Agent: 4 Months of Matty Code
- 1mo agoMemosCollaborative Spaces, author-owned memos, and Saved Views ⚡
- 3mo agoMemosEmbedded MCP endpoint, live SSE updates, and revocable share links ⚡
- 3mo agoMemosMemos Web Clipper and a redesigned memo detail rail
- 3mo agoMemosPrivate by default, CEL time filters, and a stateless MCP endpoint ⚡
- 6mo agoMemosMentions, voice recording, and Live Photo attachments
Frequently asked questions
What is the difference between Mattermost and Memos?
Both compete on the same themes — self-hosted — within Collab. 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 Mattermost better than Memos?
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 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.
What are the best alternatives to Memos?
Top Memos alternatives in Collab are ranked by recent ship velocity. Browse the "Memos alternatives" section above for the current picks, or visit /alternatives/memos for the full list with editorial commentary on each.