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Comparison · Collab
Mattermost vs Readarr
A side-by-side editorial comparison of Mattermost and Readarr — release velocity, themes, recent moves, and the top alternatives to consider.
Shared themes:self-hosted
Mattermost vs Readarr: at a glance
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.
What is Readarr?
Six releases of small fixes and translations, then nothing since June 2025.
Readarr's last six entries run from March to June 2025 and are uniformly small: a truncated root-folder path, remote image links for posters and covers, NLog message templating, disabled SelectInput options, Weblate translation batches. Every entry opens with the same instructions about switching to the develop branch and not updating inside a running Docker container. Nothing in this window adds capability, and no entry has appeared in over a year.
Mattermost vs Readarr: editorial side-by-side
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.
Readarr
0.0COLLAB
Six releases of small fixes and translations, then nothing since June 2025.
◆ Current state
Readarr's last six entries run from March to June 2025 and are uniformly small: a truncated root-folder path, remote image links for posters and covers, NLog message templating, disabled SelectInput options, Weblate translation batches. Every entry opens with the same instructions about switching to the develop branch and not updating inside a running Docker container. Nothing in this window adds capability, and no entry has appeared in over a year.
◆ Where it's heading
The pattern is a project in caretaker mode: auto-generated commit lists, incremental UI corrections, and internal work like using ReflectionOnly types to avoid loading assemblies unnecessarily. Volume held steady at roughly one release every one to two weeks until it stopped entirely. The entries themselves give no reason for the halt.
◆ Prediction
The changelog offers no signal of resumed development; without new entries there is nothing here to project forward beyond the fact that the feed went quiet after 0.4.18.
Alternatives to Mattermost and Readarr
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 Readarr.
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 Mattermost alternatives → · See all Readarr alternatives →
Recent activity from Mattermost and Readarr
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoMattermostMattermost v12.1: Control That Goes Beyond On and Off
- 5d agoMattermostYour MFA Isn't Phishing-Resistant. Here's What Is, and What the Deployment Decision Actually Involves
- 5d agoMattermostMattermost v12 pairs with Arqit for quantum-safe edge deployments
- 10d agoMattermostMattermost v12 adds device and channel attributes to access policy
- 19d agoMattermostMattermost v12 Cross Guard: managed cross-domain transfers
- 22d agoMattermostMattermost v12: Agents Are Doing the Work. Now Control What They Can See. ⚡
- 1y agoReadarr0.4.18.2805 avoids loading unnecessary assemblies
- 1y agoReadarr0.4.17.2801 returns remote image links for posters and covers
- 1y agoReadarr0.4.16.2793 fixes a truncated root folder path
- 1y agoReadarr0.4.15.2787 switches log messages to templates
- 1y agoReadarr0.4.14.2782 fixes adding an author before root folders load
- 1y agoReadarr0.4.13.2760 improves author status and loading-error display
Frequently asked questions
What is the difference between Mattermost and Readarr?
Both compete on the same themes — self-hosted — within Collab. Mattermost is currently shipping more aggressively (velocity 6.3 vs 0.0), 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 Mattermost better than Readarr?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Mattermost is currently shipping more aggressively (velocity 6.3 vs 0.0), 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 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 Readarr?
Top Readarr alternatives in Collab are ranked by recent ship velocity. Browse the "Readarr alternatives" section above for the current picks, or visit /alternatives/readarr for the full list with editorial commentary on each.