Path Robotics Hits $2.45B as Factory and Defense Tech Startups Raise $368M
For a long time, investors preferred software companies because they were cheaper to build and easier to scale. That's changing. Four startups working on factories, robots and defense raised $368 million this week, led by a $300 million round for welding robot maker Path Robotics.
The others are smaller but tell the same story. Nidus is putting AI-powered robots into defense factories. Primordial Labs lets soldiers control military equipment by talking to it. SPARETECH helps manufacturers get a grip on their spare parts.
Two big trends are behind this. The first is what people in tech now call physical AI, which means AI that controls machines in the real world instead of just producing text. The second is a push in the US and Europe to rebuild manufacturing and defense production at home. Put those two together and you get a lot of capital flowing toward factory floors.
Path Robotics: $300 million for welding robots that adapt
Path Robotics, based in Columbus, Ohio, raised a $300 million Series E at a $2.45 billion post-money valuation. Georgian led the round, and the venture arms of Yamaha Motor and Navier also took part. Bloomberg reported that the valuation is roughly four times what the company was worth in its previous round. Path raised a $100 million Series D back in 2024.
Path makes AI-driven welding robots. Welding sounds simple until you try to automate it. Metal parts are never exactly the same, they warp as they heat up, and small gaps can ruin a weld. Traditional welding robots follow a fixed path and struggle when the parts in front of them don't match the plan perfectly. That's why so much welding is still done by hand.
Path's answer is an AI model called Obsidian. It lets the robots see the part, adjust for distortion and variation, and change the weld as they go. That makes automation practical for the kind of messy, variable work that has always needed a skilled human.
There's a real labor story here too. US manufacturers have been short of skilled welders for years, and that gap gets worse as companies try to bring production back from overseas. A robot that can fill in for missing workers is an easy pitch. Reports on the round also say Path wants to take its AI beyond welding, which would open up far more factory tasks.
Yamaha's involvement is worth noting. A large manufacturer investing through its venture arm usually signals interest in using the technology, not just owning a stake.
Nidus: $30 million for robots in defense factories
New York-based Nidus raised $30 million in venture funding, according to AlleyWatch. No lead investor was named. The backers include Kleiner Perkins, Costanoa Ventures, Ludlow Ventures, SF1, Absolute Partners and Tau Ventures, plus angels Chris Power, Adrian Aoun and Nikhil Goel.
Nidus deploys embodied AI, meaning robots with AI brains, inside defense manufacturing plants. That's a clever niche. Western governments want to produce more munitions, drones and military hardware, and quickly. But many defense factories still rely on manual processes and can't hire fast enough to keep up. Robots that can handle a range of tasks without months of reprogramming could help close that gap.
Kleiner Perkins showing up in a round like this is also telling. A few years ago, few top-tier Silicon Valley firms wanted to touch defense manufacturing. Now it's one of the busier corners of venture.
Primordial Labs: $18 million to talk to military machines
Primordial Labs, based in New Haven, Connecticut, raised an $18 million Series A led by Ballistic Ventures. Its product, Anura, lets military personnel control equipment using plain language. A soldier says what they want done, and the software turns that goal into specific tasks for connected drones, sensors or vehicles.
That sounds like a small convenience, but it addresses a real problem. Modern militaries are adding more uncrewed systems, and each one tends to come with its own controls and training. Under pressure in the field, nobody wants to juggle five different interfaces. Software that lets one person direct several machines with simple commands could make those systems far more practical to use.
Ballistic Ventures focuses on cybersecurity and national security, so it understands both the opportunity and the long sales cycles that come with defense customers.
SPARETECH: $20 million to tame spare parts chaos
Munich-based SPARETECH raised a $20 million Series B co-led by Blume Equity and Insight Partners, with Headline also taking part. It's the least flashy company in this group, which is part of why it's interesting.
SPARETECH makes enterprise AI software that helps manufacturers manage their industrial spare parts. Every large plant keeps a stockroom of motors, bearings, valves and sensors so a broken machine can be fixed fast. The trouble is that the records for those parts are often a mess. The same part might be listed under five different names, so companies buy duplicates, keep too much stock, or can't find the right part when a line goes down.
SPARETECH uses AI to clean up that data, spot duplicates and help companies cut what they spend on parts. It's a classic boring-but-valuable problem. Unplanned downtime in a factory can cost a fortune per hour, and spare parts inventory ties up a lot of cash. Software that fixes both has an easy return-on-investment story to tell a plant manager.
What founders can learn from these deals
The four rounds side by side:
Company | What it does | Round | Amount | Lead(s) | Base |
Path Robotics | AI welding robots | Series E | $300M | Georgian | Columbus, OH |
Nidus | Robots for defense factories | Venture | $30M | None named | New York |
SPARETECH | Spare parts software | Series B | $20M | Blume Equity, Insight Partners | Munich |
Primordial Labs | Voice control for military equipment | Series A | $18M | Ballistic Ventures | New Haven, CT |
A few lessons come through.
Hard problems are fundable again. Welding, defense production and factory maintenance aren't glamorous, but they have big budgets and urgent needs. Investors are willing to wait longer for returns when the market is that large.
AI is moving off the screen. All four companies use AI to change what happens in the physical world, whether that's a weld, a robot arm or a drone. That's where a lot of the next wave of value is likely to come from.
Labor shortages create demand. Path and Nidus both sell into industries that can't hire enough skilled workers. When a customer can't find people, automation stops being optional.
Government priorities matter. Defense and reshoring are getting political support in both the US and Europe. Startups that line up with those priorities have a tailwind that pure software companies don't.
The challenge is that hardware and defense businesses move slower than software. Sales cycles are long, deployments take time and mistakes are costly. Path Robotics' valuation now has to be backed by robots shipping at scale. Still, the size of this week's rounds shows investors are betting the factory floor is where AI will prove its worth.
