The Pentagon is buying defence hardware faster than it can make any of it talk to each other. Sensors, autonomous platforms, edge compute, electronic-warfare payloads, space and undersea systems, all arriving at once, each speaking its own dialect. Picogrid, a six-year-old company in El Segundo, California, has raised $45 million to translate.
The Series A, announced on Thursday under embargo, was led by Bessemer Venture Partners, with Washington Harbour and GSBackers joining alongside existing backers including Initialized Capital, Starburst Ventures and the Czech fund Credo Ventures.
It follows the $12 million seed round the company closed in early 2024, and it lands as the round sizes in defence tech keep climbing.
Picogrid’s pitch is that integration, not invention, is now the constraint on military power. A force can field the best drone and the best radar on the market and still lose time stitching them into a command network that was not built to accept either.
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The company calls itself the “open integration layer,” a deliberately neutral position: built once for the ecosystem, it argues, rather than rebuilt mission by mission.
That ecosystem, on the company’s account, now spans more than 100 defence systems from vendors new and old, among them Skydio, Northrop Grumman, Echodyne, CX2 and Neros. The mix is the point. A drone-maker and a prime contractor rarely design their kit to interoperate, and the operator in the field is the one who pays for the gap.
“The systems are getting better, but the seams between them aren’t keeping up,” said Zane Mountcastle, Picogrid’s co-founder and chief executive, who built early autonomous systems as an Army contractor before starting the company. “Operators in the field are paying that tax every day, and our job is to take it off them.”
The funding, he said, will scale production in California, Oklahoma and elsewhere to meet demand from US forces and allies.
Bessemer’s interest is consistent with where the firm has been steering. David Cowan, the partner who led the deal, has spent recent years building out a defence-tech portfolio that includes Breaker and DEFCON AI, and his earlier bets ran from Rocket Lab to Anthropic.
“As autonomous systems proliferate across every domain, there’s clear demand for an infrastructure layer that’s hardware-agnostic and interoperable,” he said, describing Picogrid as “on a path to become the next integration prime.”
It is a large claim. The integration primes of the last era were the system houses that wired the platforms of their day together, and the term carries weight in a procurement world that does not hand it out lightly. Picogrid has not disclosed a valuation for the round, nor headcount or revenue, which leaves the distance between connective tissue and prime contractor a matter of trust for now.
What is not in doubt is the direction of the money. European defence-tech funding hit a record last year and has kept climbing in 2025, and the appetite on the US side is wider still.
Picogrid is betting that the next decade fields more systems, more vendors and more networks than the old integration model can carry, and that someone neutral will have to hold them together.
