Online Oceans raises £4M for autonomous maritime fleets
Online Oceans is building low-cost autonomous surface vessels and fleet software for persistent maritime monitoring, where coverage is often limited by the cost of ships, crews and sparse patrol cycles.Tags
Defence Robotics · Funding · Autonomous Surface Vessels · Fleet Software · Maritime Robotics
Online Oceans raises £4M for autonomous maritime fleets
Online Oceans, a UK company building autonomous surface vessels and fleet software for maritime security, has raised £4 million in seed funding.
The round was led by Seraphim Space, with participation from Peter Rive, co-founder of SolarCity, Frank Thieser and Florian Seibel, founders of Quantum Systems, and Koro Capital. The company says the funding will be used to scale manufacturing, support deployments and expand service across defence and commercial maritime markets.
The company’s product stack has two main parts. Scout is a compact solar-electric autonomous surface vessel designed for persistent monitoring, while Tether is the fleet command platform used to manage missions, monitor assets and access data. Online Oceans is trying to make maritime coverage cheaper and denser by pairing lower-cost vessels with fleet-level software.
The backstory is compressed, Online Oceans was founded in early 2025 by George Morton and Alistair Douglas, and the company has moved from early builds to production ramp in little over a year. Morton brings maritime engineering and defence-adjacent operating experience, while Douglas leads command-and-control software and fleet systems.
Maritime security is becoming harder to manage with periodic patrols alone, especially around subsea infrastructure, borders, chokepoints, offshore assets and defence-relevant waters. Crewed vessels are expensive to operate continuously, while many autonomous systems are still too costly to deploy in dense fleets. Online Oceans is aiming at the gap between high-end maritime platforms and the cheap, persistent coverage that many operators actually need.
The company says it has already secured initial customers across defence, maritime domain awareness and ocean data, begun first data sales, and sold out the first few months of production ahead of commercial deliveries in April 2026.