Flow Engineering raises $50M Series B at $750M valuation to bring AI agents to hardware design
Flow’s AI agents connect CAD drawings with requirements, simulations, and testing data, targeting manual bottlenecks in hardware engineering. The San Francisco startup’s $50M round brings its valuation to $750M, with Anduril, Rivian, and Joby Aviation among its customers.
Flow Engineering, a San Francisco-based startup offering AI tools for hardware design, raised a $50 million Series B round at a $750 million valuation, the company announced on September 30, 2026.
The round was co-led by Antonio Gracias of Valar Equity Partners and Gavin Baker of Atreides Management. Sequoia Capital, which led Flow’s Series A round the previous October, also participated. Former Sequoia partner Roelof Botha joined the round as an individual investor and has taken a seat on Flow’s board.
Founded three years ago, Flow develops AI agents that automatically align CAD drawings with product requirements, simulation results, and other testing data — addressing longstanding challenges in the hardware design process. The company counts Anduril, Rivian, Joby Aviation, General Motors PPU, RV Tech, and Stoke Space among its customers.
The investors bring notable track records in technology and adjacent sectors. Valar Equity Partners is best known for backing Elon Musk’s companies, particularly SpaceX, while Atreides Management has also invested in Musk-affiliated ventures as well as AI chipmaker Cerebras.
The funding and valuation suggest growing investor interest in applying AI automation to hardware engineering workflows, a field that has historically relied on manual processes. With a customer base spanning aerospace, automotive, and defense, Flow’s reach across hardware-intensive industries may position it to expand further as demand for AI-assisted design tools grows.