Onebrief

Onebrief makes military headquarters run seamlessly

Website ↗Source: Y Combinator ↗

About

Virtually everything in the military requires a plan—from everyday operations to war-time missions. With a rigorous process, many stakeholders, and rudimentary software (PowerPoint!!), planning is very slow.

Onebrief is a collaborative software designed to make military planning fast. It turns every input into reusable building blocks and automatically keeps all planning artifacts in sync.

Legal, compliance & gov Space, aviation & defense

Topics

SaaS GovTech Defense B2B

Location: Honolulu, HI, United States
Team size: 200 employees
YC batch: Summer 2021
Status: Active
Stage: Growth stage
Funding: $151M · Equity · Oct 2026

Funding rounds & filings

$151MEquity

Onebrief

Form D filing: $151M sold of a $250M offering · 2 investors

Legal, compliance & gov Space, aviation & defense

Oct 14, 2026SEC Form D ↗

$359MEquity

Onebrief

Form D filing: $359M sold · 12 investors

Legal, compliance & gov Space, aviation & defense

Jan 15, 2026SEC Form D ↗

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Questions and answers

What does Onebrief do?

Onebrief makes military headquarters run seamlessly

Where is Onebrief based?

Honolulu, HI, United States

How many people work at Onebrief?

200 employees, according to the company profile.

Has Onebrief raised money?

Latest round: $151M Equity (Oct 2026).

What are the alternatives to Onebrief?

Similar startups: Lakonia, Ravn, and TRM Labs.