AI-Powered robots deliver up to 10x ROI, cut emissions, and replace risky diver work in a multi-billion-dollar market.
Tokyo / Singapore – 29 September 2025 – Neptune Robotics has raised US$52 million in Series B funding, led by Granite Asia.
Neptune Robotics (Neptune) builds underwater robots that replace divers by cleaning ship hulls 3-5 times faster, automatically and safely. Its systems can clean full draft Capesize vessels in under 24 hours, operating day and night in clear or murky waters and even in 4-knot strong currents, another capability that is 4 times of conventional diving. With coverage across 61 ports in Asia — representing ~70% of international trade routes — Neptune already serves the world’s top bulk carrier and container fleets. Its coating-friendly approach is endorsed by leading global paint manufacturers. With more than 50,000 large commercial vessels in operation, robotic hull cleaning is a multi-billion-dollar global market.
The economic and environmental stakes are massive: biofouling increases fuel consumption by up to 30%, costing the shipping industry US$40-50 billion annually and driving excess emissions. Hull cleaning has long relied on human divers, a job with one of the highest fatality rates. Neptune’s robots automate the cleaning tasks, cut fuel costs, lower emissions, and remove humans from dangerous work.
The new funds will fuel R&D, new robotic systems, AI-driven service platforms, and expansion into 20 markets worldwide.
Elizabeth Chan, CEO of Neptune Robotics:
“Granite Asia’s support validates how far robotics has come in transforming maritime efficiency and sustainability. This round gives us the resources to scale globally, continue innovating, and help shipowners boost returns while cutting emissions.”
Granite Asia:
“At Granite Asia, we see Neptune Robotics as emblematic of a new wave of companies redefining global industries through automation and AI. We are thrilled to lead this round and support their mission of scaling technology that delivers both commercial and environmental value. With more than 50,000 large commercial vessels in operation worldwide, robotic hull cleaning represents a multi-billion-dollar market — and Neptune is at the forefront of making it safer, cleaner, and more efficient.”
About Neptune Robotics
Neptune Robotics is a technology company specializing in robotics-driven vessel cleaning and energy efficiency optimization.
Its robotic system can clean full draft Capesize vessels within 24 hours, counter 4-knot currents, operating day and night in both clear and murky waters. With coverage across 61 ports in Singapore and China — representing around 70% of major trade routes — Neptune supports shipowners at scale.
Neptune’s services are trusted by the world’s top five bulk carrier and container ship fleets. Its approach has earned endorsement from a leading silicone paint manufacturer for protecting hull coatings. Capable of cleaning all vessel types, Neptune helps clients cut fuel use, lower emissions, and advance their 2050 net-zero goals.
About Granite Asia
Granite Asia, formerly GGV Capital Asia, is a leading multi-asset investment platform building global leaders from Asia. With US$5 billion in AUM, the firm invests across Southeast Asia, Japan, China, India, and Australia, focusing on long-term themes such as automation, energy transition, health innovation, and sustainability.
