At 14, Pari Singh, the founder of Flow Engineering, made just enough money on a deal he still won't fully explain to trigger something like an existential crisis. He spent two weeks thinking about nothing else, and landed on a rule he's followed ever since: there are two universes, one where you existed and one where you didn't — and your job is to maximize the gap between them.
He channeled that into engineering. Building hybrid rocket engines as a student at Imperial College London, he built himself a tool that connected requirements, models and simulations into one live loop — turning work that took design consultancies 12 weeks into about 2 hours. Then he went to BAE Systems and BP, and watched brilliant engineers lose that same time to spreadsheets and email, on processes that hadn't fundamentally changed since the space race — even as the products themselves, dense with software, had gotten radically more complex. The tool he'd built for himself became the company: Flow Engineering.
Flow gives hardware teams a single living system of record — a connected graph of every requirement, test, interface and design decision — so a change anywhere shows its ripple everywhere, instantly. Rivian rolled it out to 40 engineers; four months later, 1,500 were running both its R1 and R2 programs on it. Joby Aviation, Astranis and Radiant Nuclear all build on Flow too.
It's since become one of San Francisco's most talked-about AI-native platforms — the company relocated its HQ there this year, deep in partnership talks with OpenAI, and is courted by nearly every serious hardware-tech investor in the Valley, and has won the category leader in each hardware vertical across defense, energy, robotics, autonomy, and aerospace.
We backed Pari in Flow’s $23M Series A led by Sequoia. Roelof Botha joined the board personally, calling Flow "GitHub for hardware" — tools built by engineers, for engineers, finally catching physical products up to software.
Less than a year later, Flow raised a $50M Series B at a $750M valuation, co-led by Antonio Gracias of Valor Equity Partners and Gavin Baker of Atreides Management, with continued participation from Sequoia. The round brings together investors who have helped shape many of the defining hardware and AI companies of the past two decades, including Tesla, Nvidia, SpaceX and Anduril.
Flow is becoming the infrastructure the next era of physical invention gets built on.