Marine Startups Haul In Close To $3 Billion In A Year

Venture backers put close to $3 billion into sizable rounds for marine-related startups over the past year, per Crunchbase data — a striking shift for a category that has historically drawn only a sliver of venture investment despite water covering more than 70% of Earth's surface.

The money is flowing across sectors ranging from defense tech to clean energy. Top investment areas include autonomous sea vessels, water robots, electric watercraft and ocean data.

One company dominates the haul

A single startup accounts for most of the past year's total. Saronic, an Austin-based developer of autonomous sea vessels that counts the U.S. Navy as a key customer, secured $1.75 billion in Series D funding in March.

The round, led by Kleiner Perkins, set a $9.25 billion valuation for the 4-year-old company, which is scaling fast. This summer, Saronic announced plans to invest more than $3 billion to build a next-generation shipyard in Brownsville, Texas, focused on software-defined shipbuilding and autonomous maritime systems.

China-based Seahi Robotics, a developer of marine robotics technology, ranked a distant second in equity fundraising. The 3-year-old startup closed a $150 million Series A round in July, backed by a long list of venture investors.

Rhode Island-based Regent took third place. The 6-year-old company develops vessels called Seagliders that operate just over the water at the speed of an aircraft. In August, it picked up $120 million in Series B equity funding led by maritime-focused investor Mare Liberum and AE Industrial Partners, plus an additional $120 million in debt financing.

Crunchbase data showed quite a few maritime-focused startups funded in roughly the past year that have raised significant capital to date — a sample list of 27 fits that criteria.

The investors building sea-focused portfolios

Several investors have assembled particularly prolific portfolios of companies focused on the seas.

Among generalist VCs, Andreessen Horowitz stands out as a backer of three companies on the sample list: Saronic, electric-boat maker Arc Boats, and Ulysses Ecosystem Engineering, a developer of small, autonomous craft for undersea environments. In announcing its April Series A lead investment in Ulysses, the firm pointed to promoting U.S. naval supremacy as an investment theme, along with reengineering technologies first envisioned on land to also work at sea.

Founders Fund is another generalist that has emerged as a serial marine startup investor. The firm has backed three companies on the list: Regent, Fleetzero, a builder of battery electric cargo ships, and Panthalassa, a developer of renewable energy systems in the ocean.

Alongside cross-sector venture investors, Crunchbase data also shows a growing array of specialized firms with multiple maritime startups in their portfolios. These include Ocean Zero, focused on startups reducing emissions from boats and ships, and Mare Liberum, a marine-focused investor with Pentagon backing.

Where the money fits

The sea may be exotic terrain for venture dealmaking, but maritime funding fits cleanly into prevailing investment trends in many ways.

Three sectors account for the vast majority of funding on the sample list: autonomy, AI and robotics. Notably, these are core areas of strength for venture investments tied to land and space as well.

A hefty chunk of marine investment also has defense tech applications. That coincides with the sharp rise in recent quarters in overall venture investment in startups with military applications.

It remains to be seen whether venture investors' enthusiasm will continue for what looks to be a capital-intensive space to scale. For now, marine-focused startups are managing to convince backers they can do a lot more than just stay afloat.