# Flow Engineering Raises $50M Series B at $750M for Agentic Hardware Engineering

Times of AI Desk · 2026-09-30 · Work

[https://timesof.ai/2026/09/flow-engineering-series-b-750m](https://timesof.ai/2026/09/flow-engineering-series-b-750m)

> San Francisco’s Flow Engineering closed a $50 million Series B at a $750 million valuation, co-led by Antonio Gracias (Valor Equity Partners) and Gavin Baker (Atreides Management), with Sequoia returning and Roelof Botha joining the board as an independent director. The bet: AI agents that keep CAD, requirements, simulation, and test aligned so hardware iteration compresses toward software cadence — with Rivian, Anduril, and Joby among named customers.

Most “AI for engineering” pitches stop at codegen. Flow’s financing argument is physical-world systems engineering: agents that propagate a design change across mechanical, electrical, and software surfaces and verify requirements before the next build burns months.

**Flow Engineering** announced September 30 a **$50 million** Series B at a **$750 million** valuation. Per the company press release, the round was **co-led** by **Antonio Gracias** (founder, **Valor Equity Partners**) and **Gavin Baker** (Managing Partner, **Atreides Management**). **Sequoia Capital**, which led Flow’s Series A, participated again, alongside Human Capital, Evantic, SV Angel, Odyssey, EQT, and angels including Hugging Face co-founder **Thomas Wolf**, Mercedes-Benz CIO **Jonas von Malottki**, and Formula 1 champion **Nico Rosberg**. **Roelof Botha** joined the board as an **independent director** and personally invested. **TechCrunch** independently corroborates the $50M / $750M terms, co-leads, Sequoia participation, and Botha’s board seat (TC misspells Valor as “Valar” in one line; the company release uses Valor Equity Partners).

CEO **Pari Singh** positions Flow as the “de facto platform for agentic hardware,” claiming **96%** inbound customers and category leaders across space, automotive, defense, and energy on the platform — **company marketing**, not an audited share figure. Named customers in the release and TechCrunch include **Rivian**, **Anduril**, **Joby Aviation**, **GM PPU**, **RV Tech** (Rivian–Volkswagen JV), **Stoke Space**, **Intuitive Machines**, and **Pacific Fusion**, with prior names such as Astranis and Radiant. Rivian adoption is the headline logo metric: **40 → 1,500** users in **seven months**, with Rivian engineers running “millions of API calls each week,” per the release quoting Rivian’s Scott Mackenzie.

## What the money is for

Flow says proceeds go to the AI harness for hardware engineering (secure work with sensitive program data), expanded review/branching/evaluation, FedRAMP and other regulated-industry certifications, engineering hiring across AI and systems engineering, and sales scale. Product frame: a living system of record linking requirements, CAD, simulation, code, and test, with agents that track changes, propagate updates, and verify coverage — aimed at shrinking hardware iteration from months toward days.

Gracias and Baker’s quotes lean on customer pull from high-bar hardware executives; Baker calls Flow “the OS on which physical products are specified, verified, and eventually designed.” Those are investor lines in a press release, not independent diligence.

## Limits

- Financing terms ($50M, $750M, co-leads, Sequoia, Botha board) are from **Flow’s September 30 release**, corroborated by **TechCrunch**. Prefer the company spelling **Valor** Equity Partners over TC’s “Valar” typo.
- Customer logos, Rivian 40→1,500 users, “millions of API calls,” and 96% inbound are **company-stated**; not independently audited here.
- No FedRAMP authorization claimed as already complete — pursuit is forward-looking.
- Distinct from excluded same-window FTC / White House / M&A pieces on the desk.

## Sources

- [Flow Engineering: Press Release — $50M Series B at $750M Valuation (September 30, 2026)](https://www.flowengineering.com/blog/series-b-press-release)
- [TechCrunch: Valor, Atreides, and Sequoia back AI startup Flow Engineering at $750M valuation (September 30, 2026)](https://techcrunch.com/2026/09/30/valor-atreides-and-sequoia-back-ai-startup-flow-engineering-at-750m-valuation/)