The Pulse
Flow Raises $50M at $750M Valuation for Hardware AI Agents
Flow Engineering announced a $50 million Series B at a $750 million valuation to expand its AI tools for hardware development. The company says its agents connect engineering changes across CAD, code, simulations and documents, and plans to
AI.info Team · Written with AI ·
“AI has transformed software development. Hardware engineering is next.”
Pari Singh, founder and CEO of Flow Engineering
Flow Engineering announced on September 30 that it has raised $50 million in a Series B round valuing the company at $750 million. The San Francisco company is developing AI agents for hardware engineering, where design changes can affect mechanical, electrical and software systems at once. Flow says its software tracks those changes across engineering tools and checks their effects on requirements and verification.
Investors back Flow’s hardware push
Valor Equity Partners founder Antonio Gracias and Atreides Management’s Gavin Baker co-led the round. Sequoia Capital, which led Flow’s Series A, also invested, alongside Human Capital, Evantic, SV Angel, Odyssey and EQT. Hugging Face co-founder Thomas Wolf, Mercedes-Benz CIO Jonas von Malottki and Formula 1 champion Nico Rosberg invested as individuals; Roelof Botha also invested personally and joined Flow’s board as an independent director.
The new capital will fund what Flow describes as an “AI harness” for hardware engineering: infrastructure intended to let AI models work with sensitive engineering data in active programs. The company says it will expand review, branching and evaluation features, add controls for complex projects, hire across AI and systems engineering, and pursue FedRAMP authorization and other certifications for regulated customers. Flow did not disclose a timeline for those certifications.
Agents track changes across engineering tools
Flow’s systems-engineering agents monitor changes in computer-aided design files, Git repositories, simulations and documents, according to Singh’s announcement. The company says they can run impact analysis, flag conflicts and identify failed requirements. Flow’s product is built around connecting requirements, design files, simulation, code and tests, rather than replacing each specialist tool with a single design application.
That approach targets a coordination problem specific to complex products: a modification in one area may require updates and checks across several teams and subsystems. Flow says its goal is to shorten hardware iteration cycles from months to days. Those cycle-time claims are the company’s stated aim; the announcement does not provide an independently measured before-and-after result.
Rivian adoption supplies the company’s clearest metric
Flow names Rivian, Anduril, Joby Aviation, Stoke Space, Astranis and Radiant Industries among its customers, and says General Motors’ Performance Parts Unit, Volkswagen and Rivian’s joint venture RV Tech, Intuitive Machines and Pacific Fusion have also adopted the platform. In a company-issued release, Flow says Rivian usage grew from 40 to 1,500 users over seven months, with engineers running millions of API calls each week. The company also says 96% of its customers arrive through inbound interest.
Rivian Director of Product Development, Process & Tools Scott Mackenzie said the automaker evaluated 30 tools before choosing Flow, adding that the platform supports a collaborative approach to systems engineering. Flow’s account points to expanding use inside large engineering organizations as evidence of demand, though customer usage figures and performance claims come from the company and its customers.
The question is how much work agents can take on
Flow’s announcement places its current product in the role of connecting engineering work and checking changes, while Singh argues that agents will eventually take on more direct execution. In his memo, he says engineers should focus on invention, architecture, trade-offs and judgment while agents handle routine digital work such as CAD, spreadsheets and simulation. That ambition reaches beyond requirements management, but the funding plans and examples announced so far center on data access, review, evaluation and verification.
For now, the practical test is whether Flow can maintain reliable checks across changing designs and software at the scale its customers need, particularly in regulated programs. Its $50 million round will support that effort, along with hiring and security certification work. The company’s most concrete deployment figure is Rivian’s reported growth from 40 to 1,500 users in seven months.