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Comparison · Collab
EGroupware vs Mattermost
A side-by-side editorial comparison of EGroupware and Mattermost — release velocity, themes, recent moves, and the top alternatives to consider.
Shared themes:self-hosted
EGroupware vs Mattermost: at a glance
What is EGroupware?
EGroupware patches critical security vulnerabilities weekly while adding S/MIME certificate management.
EGroupware is an enterprise groupware suite in heavy security-patch mode — five releases in six weeks have all led with security fixes rated high or critical. The 23.1 branch hit end-of-life in August 2026 with a final security release, consolidating the user base on 26.x. Outside the security cadence, the August 19 release added meaningful S/MIME improvements: CSR export/import, self-signed certificate generation, PKCS#7 upload support, and intermediate CA cert handling.
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.
EGroupware vs Mattermost: editorial side-by-side
EGroupware
5.0COLLAB
EGroupware patches critical security vulnerabilities weekly while adding S/MIME certificate management.
◆ Current state
EGroupware is an enterprise groupware suite in heavy security-patch mode — five releases in six weeks have all led with security fixes rated high or critical. The 23.1 branch hit end-of-life in August 2026 with a final security release, consolidating the user base on 26.x. Outside the security cadence, the August 19 release added meaningful S/MIME improvements: CSR export/import, self-signed certificate generation, PKCS#7 upload support, and intermediate CA cert handling.
◆ Where it's heading
With 23.1 EOL'd, development is concentrated on the 26.x branch. The S/MIME additions signal a deliberate push to strengthen email security credentials for compliance-sensitive enterprise users. The pace of security vulnerabilities being addressed is unusually high and may reflect active research against the codebase; once that subsides, the S/MIME track is the most visible direction for new capability.
◆ Prediction
Security patch cadence should stabilize after the current vulnerability cluster is addressed. S/MIME groundwork points toward further email encryption additions — possibly PGP support or advanced certificate authority management — in the next 1-2 releases.
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 EGroupware 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 EGroupware 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 EGroupware alternatives → · See all Mattermost alternatives →
Recent activity from EGroupware 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 agoEGroupware26.9.20260907
- 2mo agoEGroupware26.8: Critical security vulnerabilities patched
- 2mo agoEGroupware23.1 final security release — branch now EOL
- 2mo agoEGroupware26.8: S/MIME CSR, self-signed certs, PKCS#7 support added
- 2mo agoEGroupware26.8.20260811
- 2mo agoEGroupware23.1.20260804
Frequently asked questions
What is the difference between EGroupware and Mattermost?
Both compete on the same themes — self-hosted — within Collab. 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 EGroupware 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 EGroupware?
Top EGroupware alternatives in Collab are ranked by recent ship velocity. Browse the "EGroupware alternatives" section above for the current picks, or visit /alternatives/egroupware 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.