Matrix.org vs Slack

Matrix.org and Slack both land on Depends.

Matrix.org

Depends

Confidence: Medium

Buy only if you specifically need federated or self-hosted encrypted chat and can tolerate rough edges.

Depends

Confidence: Low

Confidence is low: only Slack's own marketing/security page was available for review.

Matrix.org versus Slack
Compare	Matrix.org	Slack
Verdict	Depends	Depends
Best for	Privacy-focused communities	Distributed teams coordinating in channels
Who it's not for	Teams that just need a group chat . Discord or Signal does it with less pain	Solo founders or 1-3 person teams . platform weight is overkill
Privacy	Active disclosure program, but heavy history: 89 tracked CVEs and a 2019 server breach.¹⁰	No known public vulnerabilities found in the sources reviewed.¹⁵
Support quality	No direct support-quality evidence found	No support evidence in sources reviewed
Public sentiment	Users praise the federated vision but frequently report buggy clients, sync corruption, and publicly quit in 2025.^¹	No independent user reviews were found in the sources reviewed.
Biggest gotcha	bridges nearly shut down in 2025 unless $100k was raised; funding stays fragile^⁵	Guess: Enterprise Key Management is likely a paid add-on . confirm before budgeting.¹⁵

Teams that just need a group chat . Discord or Signal does it with less pain
Non-technical users; client choice and onboarding confusion is a known complaint
Anyone expecting uptime guarantees or vendor SLAs from the free matrix.org server
Buyers who can't tolerate sync bugs or room-history loss