Does the world depend on you?

Mattermost keeps high-impact organizations connected, aligned, and secure.

Mattermost is the leading collaborative workflow platform for defense, intelligence, security, and critical infrastructure.

Trusted by the U.S. Department of Defense and Fortune 500s, our platform runs on-premises and in private clouds, delivering secure messaging, file sharing, workflow automation, audio/screenshare, and project management—all with full data and operational control.

Mattermost powers high-stakes workflows across mission planning, real-time, real-world operations, DevSecOps, incident response, and cyber defense—enabling secure collaboration from tactical edge and DDIL environments to enterprise HQ. Teams operate across web, desktop, and mobile, with embedded interoperability for Microsoft Teams, Outlook, and Microsoft 365.

Our Investors

Leadership Team

Ian Tien

CEO and Co-Founder

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Corey Hulen

CEO of Mattermost Federal, Inc. and Co-founder of Mattermost, Inc.

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Kendra Niedziejko

CFO

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Dave Reardon

CRO

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Leigh Dow

CMO

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Pavel Zeman

SVP Engineering

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Natalie Jew

VP Human Resources

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Nirosha Ruwan

VP Legal

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Jason Blais

VP Program Management

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Ajay Uppaluri

VP, GTM Strategy & Operations

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Our Leadership Principles

These principles guide our behaviors and decision-making processes from everyday projects to company strategy.

Customer obsession

We exist to make customers successful. In everything we do, we start with the customer’s perspective and work backwards.

Ownership

We own the outcomes of our activities. When we see a vacuum on something important, we jump in — we never say “it’s not my job.”

Self awareness

We seek to understand our strengths and growth opportunities. We are open to feedback and share our ideas constructively and respectfully.

High impact

We align our work to our shared vision and stay focused on top priorities. When deciding what to work on, choose projects with the highest impact.

Earn trust

We make to maximize the trust of others in our judgments. We are open, self-critical, and factual.

Our Location

We are a remote-first company headquartered in Palo Alto, California. We have a US Federal subsidiary in the Washington DC area dedicated to serving our US government customers, and a distributed international engineering and support organization serving allied nations, with subsidiaries in Canada, UK and Germany.

Mattermost, Inc
2100 Geng Road, Suite 210
Palo Alto, California 94303
United States

Mattermost Federal, Inc
1900 Reston Metro Plaza, Suite 613
Reston, VA, 20190-5952
United States