BusinessWire-- Onebrief, the operating system for modern command, today announced it closed a Series D, featuring both a primary and secondary offering for an aggregate $200M. The round was held at a post-money valuation of more than $2 billion, and was led by Battery Ventures and Sapphire Ventures, with new participation from Salesforce Ventures and additional investment from General Catalyst and Insight Partners.

“The Series D and the Battle Road acquisition are key milestones in our effort to build the superhuman military command,” said Grant Demaree, CEO of Onebrief. “We are pleased to have the support of new investors like Sapphire and Salesforce Ventures and returning ones like Battery.”

“Since we first invested in Onebrief in early 2025, the company has continued to demonstrate a clear vision and proven strategy for deploying game-changing software to the military. We’re excited to reaffirm our commitment to the company in this new funding round,” said Battery Ventures General Partner Michael Brown. “We feel Onebrief is a true defense tech pioneer, and Grant and his team continue to execute.”

“We believe Onebrief has created the ultimate operating system for global defense, redefining how mission-critical organizations plan, decide, and act. Earning trust across the U.S. military is no easy task, and Onebrief has shown outstanding execution to-date, positioning the platform for scale as it expands into AI-driven simulation and real-time decision support through its acquisition of Battle Road, “said Jai Das, President and Partner of Sapphire Ventures. "We’re thrilled to partner with Grant and the Onebrief team as they continue to build the foundation for modern military planning.”

Onebrief’s Series D funding round comes during a particularly critical period for the future of modern command. This round will help Onebrief scale rapidly and strengthen the platform’s position as the foundation for command operations — integrating planning, wargaming, simulation, and live decision support into one unified ecosystem. Proceeds from the Series D round will be used to expand Onebrief’s AI Assist product and ensure wartime resiliency.

Most notably, the Series D funding has enabled Onebrief to acquire Battle Road Digital, a leading defense innovation company applying best-in-class gaming technology to defense and national security challenges. Effective immediately, Battle Road Digital’s capabilities in real-time operational decision support become part of Onebrief’s expanding ecosystem, transforming the platform into an Operating System that enables military leaders to see, simulate, and decide faster than ever before.

“Integrating with Onebrief allows us to rapidly bridge the gap between simulation and live operations,” said Josh Henderson, Founder of Battle Road Digital. “This partnership is about developing a platform that provides commanders with powerful new tools to explore tomorrow’s fight, today, while preserving valuable lives, time, & resources. It provides leaders with cutting-edge capabilities to stress-test decisions, anticipate second-order effects, and stay ahead in a world where the margin for error is shrinking. Together with Onebrief, we’re helping shape how modern conflicts are understood, planned, and ultimately won.”

“Battle Road is now a core part of our vision to make military command superhuman,” said Demaree. “This acquisition is the key to building a system that not only plans but ensures those plans will work in the real world.”

This acquisition and the integration of these solutions provide measurable benefits to government and defense stakeholders, delivering a seamless experience that advances the Department of War’s modernization priorities. This unified platform, which continuously evolves through AI-driven learning from real-world operational data, will transform command and remove friction, empowering warfighters to act with unrivaled speed and confidence.