Maritime Startups funded by Y Combinator (YC) 2026

Albacore Inc. builds mass-producible long-range drone submarines. In the era of autonomous warfare, we support military operators with underwater systems that can traverse oceans and be deployed at scale.

REGENT is building a new mode of transportation that will redefine regional mobility by 2026. Their first product, the seaglider, is an all-electric, hydrofoiling flying-boat that operates within a wingspan of the water's surface. By flying low on a cushion of air, seagliders unlock the ability to fly twice as far as an electric aircraft, while being regulated by maritime authorities enabling market entry for a fraction of the cost. REGENT has de-risked seaglider technology with a ¼-scale flying demonstration vehicle. By this summer, REGENT will fly humans on the 15,000 lb (7000kg) first full-scale prototype seaglider, which will be the largest electric-flying machine in history. By late 2026, REGENT’s customers - airlines and ferry companies – will begin commercial seaglider service on the 12-seat initial product. A 100 passenger version, already with firm orders, will follow several years later. In just four years, REGENT has accumulated >$10B in pre-orders (including firm deposits) from airlines and ferry companies around the world. Currently a team of 100, REGENT is led by MIT-trained, ex-Boeing engineers Billy Thalheimer and Mike Klinker. REGENT has raised over $100M to date from the likes of Founders Fund, Japan Airlines, Hawaiian Airlines and Lockheed Martin, and is on contract with the US Marine Corps.

Greywing is a platform for ship operators to automate their business, through actionable intelligence, better data and communication. Greywing today serves three product lines to customers: *Flotilla* is a monitoring tool for vessels, enabling vessel managers to identify fleet-level patterns and optimizations and to identify risk and liability vectors in advance. *CRY4* is an operational tool for individual vessels that allows crew managers, security officers and masters to gather intelligence about a vessels current or proposed route, making decisions about the safest and the cheapest ports of call that a vessel can be directed to. *Landfall* is a crew management and analysis system to provide risk reporting and detailed editing capabilities about the crew on-board a vessel. *Semaphore* is a port-agent communications tool meant to simplify the process of interfacing with large numbers of port agents while planning a port call.