Mattermost
Mattermost is a cybersecurity company in Palo Alto, United States, founded in 2016. It has raised $73.2M across 7 rounds, most recently a Series B in April 2025.
Secure Collaboration for Technical Teams
- Headquarters
- Palo Alto, California
- Employees
- 51–200
- Founded
- 2016
- Business Model
- B2B
- Website
- mattermost.com
- Total Funding
- $73.2M
- Last Round
- Series BApr 2025
- Rounds
- 7
Totals include recorded grants and other qualifying funding, not just equity. What counts toward funding.
Indexed holds 7 funding rounds and 4 investors for this company. The full record is or through the API.
About
Mattermost provides secure collaboration for technical and operational teams that work in environments with complex nation-state level security and trust requirements. We serve technology, public sector, national defense and financial services industries with customers ranging from tech giants, to the world’s largest banks, to the U.S. Department of Defense and governmental agencies around the world. Our self-hosted and cloud offerings provide team messaging, file sharing, integrations, audio and screen share, workflow automation and project management on an open source platform deployed by the world’s most secure and mission critical organizations. We co-build the future of collaboration with over 4,000 open source project contributors who’ve provided over 30,000 code improvements towards our shared product vision, which is translated into 20 languages.
Summary
It lists 51–200 employees. It has raised $73.2M in total across 7 rounds, most recently a Series B round in Apr 2025. Investors include S28 Capital, Redpoint Ventures and Y Combinator.
Tech & App Stack
15 technologies & apps tracked
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Funding History
Apr 2025
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Funding: Seed through Series B. Amounts, valuations, and investors where available.
Investors
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