Nexxa.ai Secures $9M Seed Funding for AI Agents in Heavy Industries

Sunnyvale, California is not supposed to be loud. It is supposed to hum. Office parks, legacy systems, industrial muscle memory baked into concrete and code. Nexxa.ai did not arrive to make noise. It arrived to listen. Founded in May 2024, the company grew out of a simple, uncomfortable truth that Philipp Wehn learned the hard way during a decade inside heavy industry and his time leading innovation at Siemens. Four million industrial engineers are still stitching together in-house tools, spreadsheets, and brittle software to keep the physical world running. Nobody wants a rip and replace sermon when trains need to run and factories cannot blink.

Nexxa.ai closed a $9M seed round led by Construct Capital, with a16z speedrun returning alongside all prior investors. That brings total funding to $14M, following a $4.4M pre-seed in July 2025. Money matters, but context matters more. This round did not show up because of slides. It showed up because Nexxa.ai proved that AI can walk into rail yards, construction bids, manufacturing floors, and critical infrastructure without asking everything else to move out of the way.

The product is called Nitro, launched September 29, 2025, and the name fits. Not an explosion. Controlled burn. A multi-agent orchestration layer that sits on top of legacy industrial software, coordinating complex engineering workflows without forcing system replacement. Nitro plugs into visual environments, handles fragmented tools, enforces rule-based governance, and keeps humans in the loop. It is less about magic and more about leverage, the kind operators respect.

The traction reads like a stress test. Seven hundred percent revenue growth in six months through September 2025. 90% month over month growth in August alone. Three times booked ACV growth for two consecutive quarters. Fortune 100 deployments, Siemens on the customer list, Matikon Group in production, and distribution through the Siemens Xcelerator Marketplace. In some workflows, Nexxa.ai is cutting engineering effort by up to 80%. That is not a demo. That is time returned to the system.

Philipp Wehn and co-founder David Huang built this with scars and receipts. Philipp Wehn brings deep industrial and enterprise software context. David Huang brings two decades of infrastructure, security, and operations discipline, with CISSP and CCSP credentials baked into the architecture. This is why Nitro can move fast without breaking trust. Forward deployed teams embed directly with customers, delivering ROI in weeks, not quarters.

Construct Capital and a16z speedrun are betting that heavy industry is finally ready for AI that respects reality. Nexxa.ai is not chasing novelty. It is chasing momentum where steel meets software, and the calendar says now.