Onebrief
Funding History
| Series D · 01/2026 | $200M |
|---|
Overview
Onebrief is a defense technology company that builds what it calls a "Command Decision Platform" — software combining agentic AI, integrated planning, and continuous wargaming to help military staffs move from raw operational data to decisions faster. The company was founded in 2019 by Grant Demaree, a former U.S. Army officer with counter-ISIS and counter-Ebola operational experience, and went through Y Combinator's Summer 2021 batch.
Onebrief's platform is used by the U.S. Department of Defense and allied militaries for collaborative operational planning, with live synchronized data and integrations across classified military networks. The company says its software is integral to several of the largest operational plans used by U.S. and allied forces globally, and that it can cut planning-cycle time substantially compared to legacy manual processes.
The company is headquartered in Honolulu, Hawaii, and describes its team as a mix of military veterans who served across the U.S. Department of Defense, Joint Staff, NATO, and special operations units, alongside technologists with backgrounds at companies including Google, Palantir, Adobe, Oracle, Twitter, and Microsoft.
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