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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.
Immich vs Mattermost: at a glance
What is Immich?
The 3.2 candidate train narrows to bug fixes while the feed keeps missing whole releases.
v3.2.0-rc.2 is a repair round: eight fixes covering person merging, the new search UI, face-editor coordinates on unloaded video, and several mobile issues. It follows rc.1, which carried the actual 3.2 feature load — a rebuilt search on both web and API, workflow logging with asset-tag triggers, filters and actions, cluster groups, asset file APIs, a memories view and API key rotation. The tag between them, v3.2.0-rc.0, is not a release at all: it is absent from the GitHub releases list and its stored body is a truncated commit subject about building release-branch images.
What is Mattermost?
Mattermost is selling sovereignty and air-gapped AI, with releases buried in the argument
Mattermost's feed is mostly long-form positioning for regulated and defence-adjacent buyers: zero trust maturity, sovereign versus public AI, whether agentic AI can work in air-gapped environments, what an air-gapped network even is. Real release notes appear occasionally in the same stream — v11.10 brought team ABAC membership and native user work — as do deprecation notices for v12.0. Bodies are excerpts of a few hundred characters.
Immich vs Mattermost: editorial side-by-side
Immich
5.0COLLAB
The 3.2 candidate train narrows to bug fixes while the feed keeps missing whole releases.
◆ Current state
v3.2.0-rc.2 is a repair round: eight fixes covering person merging, the new search UI, face-editor coordinates on unloaded video, and several mobile issues. It follows rc.1, which carried the actual 3.2 feature load — a rebuilt search on both web and API, workflow logging with asset-tag triggers, filters and actions, cluster groups, asset file APIs, a memories view and API key rotation. The tag between them, v3.2.0-rc.0, is not a release at all: it is absent from the GitHub releases list and its stored body is a truncated commit subject about building release-branch images.
◆ Where it's heading
The workflow and plugin system that justified the v3 breaking cut is being filled in rather than extended — rc.1 added the triggers, filters and logging that make workflows automatable, and rc.2 spends itself entirely on correctness in that new surface plus search. That is the normal shape of a candidate train tightening toward release. Worth stating plainly: this feed does not carry Immich's full release history. The upstream releases list shows v3.0.0 shipping on 2 July with a 52,000-character changelog, then v3.0.1 through v3.0.3 and v3.1.0 on 29 July, none of which appear here, so any read of Immich's arc from these entries alone will skip a general-availability release and an entire minor version.
◆ Prediction
With rc.2 down to fixes concentrated in person merging and search, a further candidate or the 3.2.0 release itself is the next likely tag. What the 3.1 line contributed cannot be read from this feed and would have to come from upstream.
Mattermost
5.0COLLAB
Mattermost is selling sovereignty and air-gapped AI, with releases buried in the argument
◆ Current state
Mattermost's feed is mostly long-form positioning for regulated and defence-adjacent buyers: zero trust maturity, sovereign versus public AI, whether agentic AI can work in air-gapped environments, what an air-gapped network even is. Real release notes appear occasionally in the same stream — v11.10 brought team ABAC membership and native user work — as do deprecation notices for v12.0. Bodies are excerpts of a few hundred characters.
◆ Where it's heading
The company is arguing that collaboration and AI have to run where the network does not reach the internet, and building the access controls that argument requires. Attribute-based access control on team membership is the product side of the same pitch as the zero trust series, and the v12.0 deprecation notice indicates a larger version boundary coming in October. The content and the releases are pointed at one buyer, which makes this feed unusually coherent even though most of it is not product news.
◆ Prediction
With a v12.0 deprecation list already published for October, expect the next real releases to be migration-shaped, and the zero trust series to continue through its remaining two parts on the same schedule.
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.
Hive
Hive is building the plumbing its Buzz AI snippets need to run on real team data
Paperless-ngx
Paperless-ngx is patching hard behind a 3.1 release that made AI a workflow step
Read the Docs
Read the Docs ships a dated release every week, and this one is documentation and dependencies
Zoho Sign
Zoho Sign is clearing the exit path off Docusign while stacking up regional legal assurance
Jellyfin
Seven candidates in, 12.0 is still trading features for correctness in the metadata layer.
See all Immich alternatives → · See all Mattermost alternatives →
Recent activity from Immich and Mattermost
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoMattermostZero Trust in Practice: Identity, Part 1 — Building the Identity Foundation
- 2d agoImmichRC2 fixes person merging and the new search UI
- 5d agoImmich3.2 candidate lands new search, workflow triggers and cluster groups
- 6d agoImmichBare tag, not a release: a build-pipeline commit
- 6d agoMattermostWhat will be deprecated in Mattermost v12.0? (October 2026)
- 9d agoMattermostSovereign AI vs. Public AI: Choosing the Right Architecture for Regulated Organizations
- 15d agoMattermostCan Agentic AI Work in Air-Gapped Environments?
- 19d agoMattermostMattermost v11.10: Team ABAC Membership, Native User Attributes in ABAC, AI Agent Enhancements & More
- 23d agoMattermostWhat Is an Air-Gapped Network?
- 2mo agoImmichThird v3 candidate fixes issues found in rc.2
- 2mo agoImmichSecond v3 candidate fixes issues found in rc.1
- 2mo agoImmichRolling v3-rc tag introduced for prereleases
Frequently asked questions
What is the difference between Immich and Mattermost?
They serve adjacent needs but don't currently overlap on shipped themes. Immich and Mattermost 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 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 5.0 vs 5.0, 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.