Flow Engineering raised a $50 million Series B at a $750 million valuation, in a round co-led by Valor Equity Partners and Atreides Management, according to TechCrunch and the company's own announcement.
Sequoia Capital, which led Flow's Series A, also participated, along with Roelof Botha, a former Sequoia partner who joined the company's board as an individual investor in the round, both sources said.
Flow's AI agents automatically align computer-aided design drawings with product requirements, simulation results and other testing data, with the goal of cutting hardware iteration cycles from months to days, according to the company. Rivian, Anduril, Joby Aviation, General Motors and a Rivian-Volkswagen joint venture are among its customers, TechCrunch reported.
"We evaluated 30 tools and nothing came close to Flow," said Scott Mackenzie, Rivian's director of product development, according to the company's announcement. "It allows faster, safer development through collaborative systems engineering."
Hardware startups have spent the last few years borrowing software's playbook: fast iteration, continuous testing, tight feedback loops. Flow is selling the tooling for that shift directly, and a customer roster spanning defense, aerospace and automotive suggests it is not just a pitch deck.