Mattermost

Secure Collaboration for Technical Teams

Palo Alto, United States · Founded 2016

Employees
51–200
Founded
2016
Business Model
B2B
Last Round
Series BApr 2025
Rounds
3

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

Mattermost is a Cybersecurity company based in Palo Alto, United States, founded in 2016. Its most recent funding was a Series B round in Apr 2025. Investors include S28 Capital, Redpoint Ventures and Y Combinator Continuity Fund.

Tech & App Stack

8 technologies & apps tracked

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Funding History

Series BSeries BApr 2025

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Full funding history, per-round amounts, and investor participation.

Investors

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