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Comparison · Collab
Immich vs Mattermost
A side-by-side editorial comparison of Immich and Mattermost — release velocity, themes, recent moves, and the top alternatives to consider.
Shared themes:self-hosted
Immich vs Mattermost: at a glance
What is Immich?
Immich's v3.2 RC ships a new search UI and face clustering, advancing self-hosted photo discovery.
Immich is in active release cadence: v3.0 landed workflows, plugins, mobile editing, HLS streaming, and OCR; v3.2 is now in its third RC with a new search UI, face cluster groups, and a rebuilt search API. The RC turnaround pace suggests the team is in cleanup mode ahead of a stable release. It's a self-hosted Google Photos alternative with a large community of contributors across server, mobile, and web.
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.
Immich vs Mattermost: editorial side-by-side
Immich
6.3COLLAB
Immich's v3.2 RC ships a new search UI and face clustering, advancing self-hosted photo discovery.
◆ Current state
Immich is in active release cadence: v3.0 landed workflows, plugins, mobile editing, HLS streaming, and OCR; v3.2 is now in its third RC with a new search UI, face cluster groups, and a rebuilt search API. The RC turnaround pace suggests the team is in cleanup mode ahead of a stable release. It's a self-hosted Google Photos alternative with a large community of contributors across server, mobile, and web.
◆ Where it's heading
The product is moving from Google Photos parity toward differentiation through extensibility and AI-assisted organization. Workflows and plugins opened the automation surface in v3.0; the new search UI and cluster groups in v3.2 close the discovery gap. That combination — automation plus better semantic search — is the basis for a self-hosted photo library that replaces cloud products in daily use rather than just archiving them.
◆ Prediction
v3.2 stable will ship within days given the current RC pace. After that, expect the workflow engine to get additional triggers and actions, and possibly AI-assisted album creation tied to the new cluster groups and search API.
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.
Alternatives to Immich 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 Immich or Mattermost.
SiYuan
SiYuan 3.8.9 reaches RC, adding AI-agent extraction of images embedded in PDFs.
KACE
KACE extends its PHP2SHELL fix to the SDA deployment appliance, six days after disclosure.
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 Immich alternatives → · See all Mattermost alternatives →
Recent activity from Immich and Mattermost
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 3d agoMattermostMattermost v12 Cross Guard: managed cross-domain transfers
- 6d agoMattermostMattermost v12: Agents Are Doing the Work. Now Control What They Can See. ⚡
- 15d agoMattermostWhere the Response Team Talks After the Gateway Falls
- 23d agoMattermostThe Conversation Is the Operation: Defending Collaboration Infrastructure Like an Intelligence Asset
- 23d agoMattermostTwo Outages, One Vendor, One Lesson in Resilience Planning
- 23d agoMattermostOur Newest Top Contributor Is an AI Agent: 4 Months of Matty Code
- 1mo agoImmichv3.2.0 RC3: bug fixes before stable release
- 1mo agoImmichv3.2.0 RC2: search UI and face merge bug fixes
- 2mo agoImmichv3.2.0 RC1: new search UI, face cluster groups, memories view ⚡
- 2mo agoImmichv3.2.0-rc.0: fix: build release branch images instead of re-tagging main (#31064)
- 4mo agoImmichv3.0.0 RC3: webhook actions and bug fixes
- 4mo agoImmichv3.0.0 RC2: bug fixes ahead of stable release
Frequently asked questions
What is the difference between Immich and Mattermost?
Both compete on the same themes — self-hosted — within Collab. Immich and Mattermost are shipping at a similar cadence (velocity 6.3 vs 6.3, 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 Immich better than Mattermost?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Immich and Mattermost are shipping at a similar cadence (velocity 6.3 vs 6.3, both within Sparkpulse's "active" band). For your specific use case, the alternatives sections above list other Collab products to evaluate alongside.
What are the best alternatives to Immich?
Top Immich alternatives in Collab are ranked by recent ship velocity. Browse the "Immich alternatives" section above for the current picks, or visit /alternatives/immich 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.