Cellula Robotics is turning hydrogen fuel-cell AUVs into an integrated undersea warfare stack
A 10-year defense market framework with Metron and a UK delivery footprint extend Cellula fuel-cell AUVs across allied undersea autonomy programs.

Guardian is the extreme-range defense class in Cellula's fuel-cell AUV family, with an 11.7-meter hull, 8,000-kilogram weight, and 5,000-kilometer maximum range. Envoy scales the same hydrogen fuel-cell approach into a smaller long-range class, with an 8.5-meter length, one-meter diameter, and 2,000-kilometer maximum range for survey, cable inspection, and mine-countermeasure payloads.
The competitive field includes Anduril Dive-LD, Kongsberg HUGIN, Huntington Ingalls REMUS, Saab Sabertooth, Ocean Infinity, Teledyne Gavia, and defense undersea autonomy programs. Cellula's distinction is hydrogen fuel-cell endurance paired with partner autonomy, payload, health-management, and support layers. Public material still does not disclose delivered unit counts, active fleet size, autonomy intervention logs, mission success rates, or sustainment cost. If the Metron and DIU work turns Guardian into a supported U.S. defense capability, Cellula becomes a long-range undersea autonomy stack rather than only a fuel-cell AUV builder.
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- Cellula RoboticsCompany
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