Mattermost.com
Headquarters
Palo Alto, CAFounded
2015CEO / Founder
Ian TienEmployees
201-500Funding
Series C — $70MProducts
0 products listedWebsite
mattermost.com/
Profile updated
About Mattermost.com
Mattermost is an open-source messaging and collaboration platform founded in 2015 by Ian Tien and Corey Hulen, headquartered in Palo Alto, California. The company builds a self-hostable alternative to cloud-based messaging tools, targeting organizations that require on-premises deployment, data sovereignty, or strict security controls, including defense, government, and regulated industries.
Mattermost's primary product is a team messaging platform that supports channels, direct messaging, file sharing, and integrations with developer tools such as GitHub, Jira, and Jenkins. The platform is available in open-source and commercial editions, with enterprise features including compliance exports, LDAP/SAML authentication, and high-availability configurations. Notable customers include the U.S. Department of Defense, which has deployed Mattermost within classified and air-gapped environments. The company also offers Mattermost Boards for project management and Playbooks for structured workflow automation.
Mattermost raised a $50 million Series B round in 2019 led by Redpoint Ventures, bringing total funding to approximately $70 million. The company operates with a distributed workforce and has grown its commercial customer base among defense contractors, financial institutions, and technology firms. Its open-source repository on GitHub has accumulated significant community contributions, underpinning both the free and enterprise product tiers.
Specialties
Financials
Dated, source-cited figures. Estimates are marked.
No products listed yet for this company.
Competitive Landscape
Who Mattermost.com competes with, and how they differ.
Cloud-only and closed-source; Mattermost differentiates as the self-hostable, open-source alternative that keeps data on-premises for regulated, defense, and air-gapped customers.
1 product reviewed on TopReviewed
Bundled into Microsoft 365/GCC High with far greater enterprise distribution; Mattermost competes on deployment flexibility and data sovereignty for customers who cannot or will not run on Microsoft's cloud.
9 products reviewed on TopReviewed
A video-first collaboration suite bundled into Cisco's broader enterprise and public-sector contracts; Mattermost differentiates with a lighter-weight, text-first, self-hosted architecture built for regulated and defense environments.
1 product reviewed on TopReviewedBuilt on the decentralized Matrix open protocol rather than Mattermost's centralized open-core architecture, and already deployed by NATO, the German Bundeswehr, and the US Navy/Marine Corps for sovereign messaging — Mattermost's closest rival in defense-grade secure collaboration.
Another open-source, self-hostable team chat platform now positioned as a "Secure CommsOS for Mission-Critical Operations," targeting the same defense, government, and critical-infrastructure buyers as Mattermost with a similar open-core pricing model.
Company Timeline
Key milestones in Mattermost.com's history, with sources.
- Partnership
Mattermost and Virtru Partner on Zero Trust Data Protection
Mattermost integrated Virtru's Zero Trust Data Format (ZTDF) file protection natively, enabling mission teams to collaborate securely on national-security and mission-critical operations.
mattermost.com - Partnership
Mattermost, archTIS, Arqit and Whitespace Deliver Integrated Defence Collaboration
The four companies combined to deliver a unified operational environment bringing secure collaboration and data-centric policy enforcement to defence customers.
mattermost.com - Milestone
Mattermost Establishes Japan Subsidiary, Launches Mission Operations for Microsoft
Mattermost opened a Japan subsidiary and launched Mission Operations integration for Microsoft Azure Local to serve allied defense customers in the Pacific.
mattermost.com - Launch
Mattermost Launches Free Entry Tier
Mattermost introduced a zero-barrier free evaluation tier aimed at governments, defense, and critical-infrastructure organizations.
mattermost.com - Milestone
Mattermost Launches Intelligent Mission Environment in Finland
Mattermost rolled out its Intelligent Mission Environment, a sovereign secure-collaboration platform, in Finland to support national-security customers.
mattermost.com - Launch
Mattermost Launches Enterprise Advanced
Mattermost introduced Enterprise Advanced, targeting multi-domain operations for defense, intelligence, and critical-infrastructure customers.
mattermost.com - Launch
Mattermost Launches Intelligent Mission Environment Platform
Mattermost repositioned its core platform as the Intelligent Mission Environment, a sovereign AI-integrated collaboration platform for mission-critical operations.
mattermost.com - Funding
Mattermost Discloses $50.4M Securities Offering (SEC Form D)
Mattermost, Inc. filed a Form D with the SEC disclosing a $50,441,018 offering with date of first sale June 19, 2019; the filing lists Redpoint Ventures' Tomasz Tunguz and Y Combinator Continuity's Ali Rowghani among company directors.
sec.gov - Launch
Mattermost 1.0 Released
Mattermost reached its 1.0 milestone as a self-hosted, MIT-licensed team communication tool, following its first security audit, positioned as a Slack-compatible alternative.
mattermost.com - Founded
Mattermost, Inc. Founded by Ian Tien and Corey Hulen
Ian Tien and Corey Hulen co-founded Mattermost, spinning an internal chat tool originally built at SpinPunch, a game development studio, into a standalone open-source company.
mattermost.com
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