Autonomous surface vessels, underwater vehicles, and ocean robotics for defense and industry.
Catalog last reviewed 2026-08-10. Page copy reviewed 2026-08-10. Next editorial review by 2026-09-10. Alphabetical order, no paid placement. 6 matched live listings.
This shortlist is the live catalog slice for the Maritime & Underwater category. Listings appear here only when their primary category matches. Full page-unique intros for remaining categories ship in a later polish pass.
How order works. Matched companies are the full live catalog slice for this primary category, sorted alphabetically by name. This is not a scored quality ranking. When listing fees open, they are intended to affect publish timing or review-queue position only, not alphabetical order or praise on this page (payments are currently closed). Operator house products are not catalog entries here; they appear only as a labeled footer bridge. See /transparency.
Category index: /categories/maritime-underwater. Parent hub: /best. Full catalog: /directory.
Brooklyn, USA
Autonomous AUVs and cloud software for high-resolution seafloor mapping
Raised $25M Series A led by Primary and Northzone (June 2025) to scale seafloor survey operations; site active with 2024 copyright and open roles
Torrance, USA (relocating to Port of Los Angeles)
Affordable ROVs, USVs, thrusters, and sonars for the marine robotics community
Signed a 10-year lease for a 49,000 sq ft HQ and production facility at AltaSea, Port of Los Angeles, with build-out starting early 2026; workforce has nearly doubled
Fremantle, Australia
Vision-based AI software that turns vessels into autonomous surface craft
Partnered with Austal (announced at Indo Pacific 2025, Nov 2025) to integrate GAMA/Lookout+ autonomy into future vessels in as little as five days; won 2025 WA Innovator of the Year Growth award
Austin, USA (with Southampton, UK operations)
Lean-crewed and remotely operated robotic vessels for offshore survey and inspection
Completed its 14-vessel Armada fleet with delivery of the final 86m-class ship (Dec 15, 2025), capping a five-year build program
Sydney, Australia
Subsea robotic manipulator arms for ROVs in harsh underwater environments
Contracted by the Australian Defence Force for a deep-water (800m+) Reach X manipulator variant (delivery mid-2025); exhibiting at Indo Pacific 2025 in Sydney (Nov 4-6, 2025)
Alameda, USA
Wind and solar powered autonomous surface vehicles for maritime security and ocean data
Lockheed Martin invested $50M (Oct 29, 2025) to advance USV capabilities for the US Navy; earlier $60M raise closed May 2025 for European expansion