Oshen develops 1.2-metre C-Star unmanned surface vehicles that are wind- and solar-powered, can operate autonomously for months, and send data by satellite. The robots are light enough for a single person to launch from a boat and are designed to operate in coordinated groups that can cover hundreds of miles or concentrate at specific locations. Oshen’s C-Stars were the first uncrewed vehicles to collect real data from inside a Category 5 hurricane, and the company’s longest mission lasted eight months at sea. Manufacturing is now based in Plymouth and output has scaled from 15 units produced over the company’s first three years to a cadence of 15 robots every six weeks, with 100 additional units ordered. Customers and collaborators include the US Navy’s Naval Meteorology and Oceanography Command and partners such as ZeroUSV and MarineAI on defence-related trials. The company has grown from seven employees in September 2025 to almost 30 employees as it pursues higher-volume, lower-cost deployments to compete with larger rivals like Saildrone, Sofar Ocean and Boeing’s Liquid Robotics.

Total raised

$5M

Funding rounds

1

Latest round

Equity

Latest activity

Aug 2026