He sold warehouse robots to Shopify for $450 million. Then he went back to the sea he served on, to build ships that steer themselves.
In a Boston shipyard, a 145-ton hull sits without a galley, without bunks, without anybody aboard to brew coffee on the midwatch. That is the point. Rylan Hamilton runs Blue Water Autonomy, and the thing he is building does not eat, sleep, or get seasick. "Think of it as the world's largest mobile robot on water," he says - a software-defined, modular surface vessel meant to run for weeks or months at a stretch, alone, across open ocean.
The pitch lands somewhere between SpaceX and Waymo. Strip out the crew and the apartment-block worth of life support that keeps a crew alive, and a warship gets cheaper, smaller, and stranger. Hamilton's investors have a shorthand for the ambition: the Waymo of the open ocean. In August 2025 that ambition pulled in a $50 million Series A led by GV, bringing Blue Water's total to $64 million from Eclipse, Riot, and Impatient Ventures.
What makes the company hard is not the steel. Shipyards have bent metal for a century. "The hard part is actually the autonomy on the inside of the ship," Hamilton says - the part that has to make decisions, route around weather, and keep itself running with no hands on deck and no port within a thousand miles. Anyone can build a boat. Building one that thinks while nobody's watching is the trick.
He co-founded the company in 2024 with Austin Gray, a former Navy intelligence officer, and Scott N. Miller. The plan for 2026 is blunt: put a full-scale, long-range autonomous ship - 100 to 150 feet, engineered to cross thousands of miles - in the water and let it go. The longer plan is bigger still. Hamilton talks about a modern Liberty ship moment: mass-produced, software-upgradeable hulls that revive American shipbuilding the way the WWII yards once did, only these ones drive themselves.
The hard part is actually the autonomy on the inside of the ship - a ship that needs to be out there for weeks or months at a time.
Rewind to 2008. Hamilton walks into Kiva Systems with a Harvard math degree, an MBA, a tour of Navy sea duty - and zero robotics experience. He starts on the warehouse floor and works his way up into the roles overseeing how the robots get designed and deployed. "We're making mobile robots for warehouse automation," he liked to say. "Robots are a lot cooler." Amazon agreed, and bought Kiva for $775 million.
He didn't stop there. In 2015 he co-founded 6 River Systems with fellow Kiva alum Jerome Dubois and Mimio's Christopher Cacioppo. Their flagship robot got named Chuck, after the Charles River - a wink from a company that never forgot it was a Boston outfit. Chuck didn't replace warehouse workers; it walked alongside them, showing them the fastest path to the next pick.
The money was never easy. "Anytime you start a company and you're doing hardware and software, it's always hard to raise money," Hamilton has said. So the founders did the math the hard way: they personally drove four-hour deployment trips from Boston to Pennsylvania rather than hire more staff. Forty-five million dollars over four years, run lean. In 2019 Shopify bought the whole thing for $450 million.
Two companies, one idea, repeated: take the human off the floor and let the machine do the miles. The third time, he aimed it at the ocean.
Start with the missile. On his very first day aboard an amphibious transport ship in the Persian Gulf, during Operation Iraqi Freedom, Hamilton experienced incoming fire. It is the kind of welcome that recalibrates a career. He had come to the Navy sideways - a finance internship that didn't fit, then 9/11, then a decision rooted in something older than a job search. "I joined the Navy after 9/11," he says, "driven by a love for the ocean and a sense of duty."
The duty ran in the family. His grandfather served in the Pacific. His biological father was a Naval Academy graduate who ran nuclear submarines in the 1960s. Hamilton commissioned through Officer Candidate School in Pensacola and went on to serve as a surface warfare engineering officer, then as navigator on a frigate working counter-narcotics patrols in the Eastern Pacific.
Those years did two things. They taught him, in his words, "just how complex and maintenance-heavy naval ships are" - the kind of firsthand knowledge that later let him pitch the Navy as a peer rather than a vendor. And they gave him a worldview he still recites as three principles: ownership, leading from the front, and a wardroom mentality that puts the mission ahead of the org chart. Strip those out of his startup story and nothing else quite makes sense.
It also explains the strange loop of his life. The man who left the sea to chase robots in landlocked warehouses spent two decades getting good enough at autonomy to bring it back to the water - and to the service that sent him out in the first place. Credibility, in defense, is not a slide. It's a sea tour.
The defense logic is uncomfortable and simple. Crewed warships are expensive not only to buy but to keep alive - every sailor aboard needs water, food, air, space, and rescue. Remove the crew and a vessel can be smaller, cheaper, and willing to go places a captain would think twice about. Hamilton frames the cost shift the way space watchers talk about SpaceX: a mission performed at a fraction of the price by taking the people out of the loop.
But cheap isn't the headline - endurance is. Plenty of companies build small uncrewed boats for short-range work near shore. Blue Water aims at the open ocean, vessels engineered to operate for weeks or months thousands of miles out, alone. That is why Hamilton keeps insisting the hard problem is "the autonomy on the inside" - the brain that has to diagnose, decide, and self-maintain with no port and no hands within reach.
The endgame he describes is industrial as much as military. He invokes the WWII Liberty ships: standardized, mass-produced hulls churned out fast enough to change a war. His version is software-defined and upgradeable, a way to revive American shipbuilding capacity and, eventually, to run commercial "middle mile" logistics across water. The roster of believers - GV, Eclipse, Riot, Impatient - is betting that the third time Hamilton turns a machine loose, the floor is the entire ocean.
A finance internship doesn't suit him. After 9/11, he joins the U.S. Navy - "driven by a love for the ocean and a sense of duty." Trains at Officer Candidate School in Pensacola.
First day aboard an amphibious transport ship in the Persian Gulf during Operation Iraqi Freedom: incoming missile fire. Welcome to the fleet.
Surface warfare engineering officer, then navigator on a frigate running counter-narcotics patrols in the Eastern Pacific.
Joins Kiva Systems with no robotics background. Starts on the warehouse floor, climbs into design and deployment leadership. Amazon buys Kiva for $775M.
Co-founds 6 River Systems. Names the flagship robot "Chuck" after the Charles River.
Shopify acquires 6 River Systems for $450M.
Co-founds Blue Water Autonomy with Austin Gray and Scott N. Miller.
$14M seed in April; $50M GV-led Series A in August. Tests autonomy on a 145-ton vessel in the open ocean.
Targets deployment of the first full-scale autonomous ship, built to cross thousands of miles.
Personal accountability when the stakes are real and nobody is coming to save you. At sea you can't take no for an answer - everything has to actually work.
Prove you'll do the hard, unglamorous work yourself. The four-hour drives to deploy robots in Pennsylvania weren't a story he delegated.
Mission over hierarchy, collaboration over self-promotion. The Navy, he says, doesn't just want cool tech - it wants trusted partners who understand.
"Think of it as the world's largest mobile robot on water - a software-defined, modular surface vessel."
"When you're on a ship or in the military, you can't just take no for an answer - you have to make sure everything works."
"Because there's no crew, we don't need accommodations like galleys or living quarters."
"Be ambitious - you only get one chance to decide on the mission you want to go on. Once you start it, there's no turning back."
A modern Liberty ship moment: mass-produced, software-upgradeable hulls that revive American shipbuilding - except these ones steer themselves.