Tethys Robotics, a spin-out from ETH Zurich university, has raised €3.5 million in pre-seed funding to accelerate the commercial rollout of its autonomous underwater systems designed to replace high-risk diver operations.
The Zurich-based company develops robotic platforms capable of conducting subsea missions such as wreck inspection, object recovery, and unexploded ordnance handling – tasks traditionally performed by divers.
The investment round was led by Redstone, with participation from Euregio+, Alpine VC, Zürcher Kantonalbank, the ETH Foundation, Kickfund, and Venture Kick. The new funding will be used to expand Tethys’ engineering and data science teams, scale production, and transition from pilot projects to full commercial operations across Europe.
Tethys’ technology builds on research carried out at ETH Zurich, combining robotics and data-driven autonomy to improve subsea operations. The company says it is targeting a range of maritime sectors, including infrastructure inspection, offshore energy, and environmental monitoring, as it scales up operations.
