Mattermost is an open-source, self-hostable online chat service with file sharing, search, and third-party application integrations. It is designed as an internal chat for organisations and companies, and mostly markets itself as an open-source alternative to Slack and Microsoft Teams.
Summary from Wikipedia.
Publicly advertised compliance posture
As observed on September 8, 2026 on the organization’s public trust center.
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ISO 27001
International standard for an information security management system, certified by accredited bodies.
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SOC 2
Independent CPA audit of controls for security, availability, and confidentiality.
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SOC 3
Public summary of a SOC 2 audit, intended for general distribution.
Compliance timeline
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2015
Company founded
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September 8, 2026
Posture last observed by Trust Index
Security & compliance hiring
Open roles on the organization’s public job board, a signal of active investment in security and compliance.
- GRC Manager
About this data
The Trust Index reports only what organizations publicly advertise. A missing framework here means no public claim was observed as of September 8, 2026; it never means an organization is non-compliant. HIPAA entries reflect a public claim of compliance; no HIPAA certification exists. Corrections are welcome and verified against public evidence. Read the full methodology.
