Ulysses Raises $38M Series A Led by Andreessen Horowitz to Scale Autonomous Ocean Drones (April 2026)

Irish-founded maritime robotics startup Ulysses on April 16, 2026 announced a $38 million Series A led by Andreessen Horowitz — alongside a previously undisclosed $8 million seed round — bringing total funding to $46 million. The three-year-old San Francisco / Dublin company builds autonomous underwater and surface vehicles for ocean-floor surveying, seagrass restoration, undersea cable inspection, and mine countermeasures, and says its fleet is already generating more than $5 million in customer revenue.

What Happened

Ulysses, founded in 2023 by Akhil Voorakkara (CEO), Will O'Brien (president), Jamie Wedderburn (CTO), and Colm O'Brien (COO), formally disclosed its Series A on April 16. The round was led by Andreessen Horowitz's American Dynamism fund, with participation from Booz Allen Ventures (the corporate venture arm of the defense contractor) and Harpoon Ventures. The company also revealed an earlier $8 million seed round led by Pebblebed, with Genius Ventures, Lowercarbon Capital, Superorganism, and ReGen Ventures participating.

The funding will be used to scale production of the Mako autonomous underwater vehicle and move two newer platforms — the Leviathan autonomous surface vessel and the Kraken launch-and-recovery system — from prototype into serial production. The company currently has roughly 20 employees and describes its thesis as the "operating system for the ocean": massive, networked fleets of low-cost autonomous vehicles, above and below the surface, that replace crewed ocean operations costing tens of thousands of dollars per day.

Key Details

• $38M Series A + $8M seed = $46M total — led by Andreessen Horowitz's American Dynamism fund, with Booz Allen Ventures and Harpoon Ventures joining the A.
• Mako AUV specs: 2 meters long, ~400 lb, dives to 5,000 feet for up to 72 hours, modular payload bay that swaps in minutes, base price around $50,000 — roughly 20–400× cheaper than legacy defense-contractor AUVs that sell for $1M–$20M.
• Customers: US Navy, the Australian government, the Great Barrier Reef Foundation, The Nature Conservancy, the Virginia Institute of Marine Science, Mote Marine Laboratory, and the Florida Department of Environmental Protection.
• Revenue traction: $5M+ already generated across defense, scientific, and environmental contracts.
• Two new platforms: Leviathan (autonomous surface vessel) and Kraken (launch-and-recovery) enter production; five generations of underwater vehicle prototypes have already been field-tested.

What the Industry Is Saying

Coverage in The Irish Times, Silicon Republic, and StartupHub.ai frames the raise as one of the more capital-efficient maritime-autonomy rounds of the year — $46M total funding against $5M in annual revenue and 20 employees is an unusually tight capital base for a hardware company with Navy customers. Defense-tech commentators on X highlighted the Booz Allen investment as the most important signal: when a large primes-adjacent VC writes a check, it typically precedes a path to classified contract vehicles.

On the environmental side, the Great Barrier Reef Foundation and the Nature Conservancy partnerships push back on the common dual-use critique of American Dynamism — Ulysses is one of a small group of defense-adjacent startups with a credible ecological restoration pipeline, not just a marketing veneer. The seagrass-restoration work in Perth and the Caribbean is active revenue, not a future concept.

What This Means for the Maritime and Defense Industry

For ocean operators — Navy, energy companies, environmental agencies, and research institutions — the Mako price point rewrites the economics of underwater operations. A single crewed survey vessel day-rate can exceed $30,000; a fleet of $50,000 AUVs can be parked on a workboat or shore facility, deployed on demand, and lost-without-ruin if one fails. The cost-per-survey-mile drops by an order of magnitude or more.

For the broader defense-tech cohort — Anduril, Saronic, Shield AI, and a growing list of a16z American Dynamism companies — Ulysses validates that sub-$100K autonomous hardware with live Navy customers can attract top-tier Series A pricing in 2026, even with a small team and a short operating history. Expect more capital into maritime-autonomy startups over the next 12 months.

What's Next

Ulysses says the new funding will be spent on: (1) manufacturing capacity for Mako to meet existing orders, (2) productionising Leviathan and Kraken so the three platforms can be sold as an integrated system, (3) hiring across hardware, software, and field operations, and (4) expanding deployments with the US Navy, the Australian government, and environmental partners in the Caribbean and Coral Triangle. No timeline has been given for a Series B, but the company's combination of defense and climate customers suggests it could raise again within 12–18 months at a substantially higher valuation.

Sources

• The Irish Times — Irish-founded Ulysses raises $38m in Series A funding — primary report of the round.
• Silicon Republic — Ulysses raises $46m in rounds featuring a16z — details on total funding and founders.
• StartupHub.ai — Ulysses Secures Series A for Ocean Autonomy — investor and customer breakdown.
• Core Memory — The $50,000 Underwater Drone (EP 66 Ulysses) — pricing, specs, and founder interview.
• The AI Insider — Booz Allen invests in maritime autonomy company Ulysses — defense-strategic reaction.
• Ulysses (The Ocean Company) — Official site — product pages for Mako, Leviathan, Kraken.