Onebrief
Collaborative AI-powered military operational planning software
Defense
📍 Honolulu, HI
Founded 2019
Current Valuation
$2.1B
as of 2026-Q1
UNICORN
Onebrief is a defense-tech unicorn that replaces the PowerPoint-and-email workflow of military operational planning with a collaborative AI-powered software platform. Founded in 2019 by former US Army officer Grant Demaree, the Honolulu-based company raised a $200M Series D at a $2.15B valuation in January 2026 and acquired battle-simulation startup Battle Road Digital in the same round.
Company Profile
Growth
Valuation nearly 2x in 6 months ($1.1B Jun 2025 → $2.15B Jan 2026)
Last Round
Series D — $359M (Jan 2026) · Lead: Battery Ventures
Founders & Key People
Grant Demaree
Investors
Battery Ventures · Sapphire Ventures · General Catalyst · Insight Partners
Products
- Onebrief military planning workspace
- Real-time collaborative staff planning
- AI tools for operational orders and COA development
- Battle Road Digital (acquired 2026 — simulation)
Competitors
Palantir (PLTR) · Anduril Lattice · Govini
DefenseDefense TechAIUnicorn
Private-company numbers are not real-time. Reflects publicly disclosed valuations from press releases, news reports, and tender offers as of 2026-Q1. Refreshed quarterly.