- Senra Systems has raised a $65 million Series B, co-led by Lowercarbon Capital and Interlagos, bringing its total funding to over $112 million.
- The startup builds software that modernises wire harness manufacturing, a process still done largely by hand.
- Senra’s total funding now stands at over $112M, with Lowercarbon Capital and Interlagos co-leading this round alongside General Catalyst, Sequoia Capital, and Andreessen Horowitz.
When Jordan Black was a SpaceX engineer, his job was to scale wire harness production for the Starship rocket. He travelled the world visiting suppliers. Every factory he walked into looked the same: wooden peg boards, manual processes, technicians working from 600-page PDFs.
“It really hasn’t changed since the Cold War era,” he told TechCrunch. In 2023, he quit and decided to fix it.
Senra Systems, the Redondo Beach, California-based wire harness manufacturer Black co-founded with Benjamin Shanahan, has raised a $65M Series B co-led by Lowercarbon Capital and Interlagos, with participation from General Catalyst, Sequoia Capital, Andreessen Horowitz, Founders Fund, Dylan Field, CIV, 8VC, The Friedkin Group, Jaws Estates Capital, Sozo Ventures, and Alumni Ventures. The round brings Senra’s total funding to over $112M.
The nervous system nobody modernised
Wire harnesses are the bundles of electrical cabling that run through every rocket, submarine, car, and tractor, connecting power and data systems. They are bespoke, built by hand, and critical — when Boeing discovered in 2023 that Starliner’s wiring was held together with flammable tape, it had to rebuild the entire system at enormous cost.
Senra’s platform, Amp, builds a digital twin of every harness and walks technicians through assembly in real time. It isn’t trying to remove people from the process — robots still can’t reliably manipulate wire — so it standardises the inputs and automates everything around the manual work instead.
The company currently produces 1,000 harnesses a month across two factories and plans to reach 10,000 a month by 2027. Its newly opened Cypress facility expands capacity fivefold and adds roughly 80,000 square feet of manufacturing space.
“One of the biggest bottlenecks in aerospace and defense manufacturing today is the skyrocketing demand for wire harnesses,” said Black. “Wire harnesses are the nervous system behind every advanced platform, yet they’re still built on PDFs, spreadsheets, and tribal knowledge. We started Senra to solve one of the most overlooked but consequential bottlenecks in the aerospace and defense ecosystem.”
A crowded but wide-open field
Senra competes with Layup Parts, a composite-manufacturing startup for aerospace, and legacy suppliers like NAI Group and Kauffman Engineering that still rely on manual, months-long workflows. Senra says its platform compresses that to weeks. It’s entering a space adjacent to defence-manufacturing companies like Mach Industries, which raised $300 million at a $1.8 billion valuation earlier this year, as investors chase hardware capable of scaling U.S. defence production, not just software.
Lowercarbon Capital, the Jackson, Wyoming-based climate and advanced manufacturing fund founded by Chris Sacca, an early investor in Uber and Twitter and previously an investor in Crusoe, Watershed, and Commonwealth Fusion Systems, co-led the round.
“Wire harnesses sit behind everything that turns on, and they’re still built by hand,” said Caie Kelley, general partner at Lowercarbon. “Senra automates production and trains the workforce to run it, which turns a chokepoint into capacity the country can build on.”
The market Senra is entering is large and accelerating. The global wire harness market was valued at $95.9B in 2025 and is projected to reach $160.73B by 2035, expanding at a CAGR of 5.3%, according to Research Nester, driven by electrification, defence spending, and the growing complexity of hardware platforms. Senra’s 97-person team is already working with builders of submarines, land-based defence vehicles, launch vehicles, and satellites, though Black has not disclosed specific customers.
The $65M will fund a third factory, grow the engineering team, and extend Senra’s first US pilots. The deeper question the round raises is whether software-defined manufacturing can move fast enough to keep pace with the defence procurement surge or whether the bottleneck will simply migrate from the harness to the factory floor.
