A Shanghai Startup Bets Shipowners Will Trade Divers for Robots

Bozhan Robotics, a Shanghai-based underwater robotics company, has closed its first institutional funding round, a sum in the tens of millions of RMB led by Daotong Investment with Shida Bo following on, to scale production of a robot that cleans barnacles and marine growth off ship hulls without sending a diver into the water. The company builds the Metis series, a line of underwater hull-cleaning robots that combine vision-based navigation, AI path planning, magnetic hull adhesion, and cavitation-jet cleaning, plus a separate interior-cabin cleaning robot called HiClean-X.

Hull cleaning is one of shipping's least glamorous, most expensive recurring costs. Marine growth on a ship's underwater surfaces increases drag, which increases fuel burn, which is why shipowners schedule cleaning on a fixed cycle regardless of how unpleasant or risky the job is for the human divers who currently do most of it. Bozhan's pitch is straightforward: replace the diver with a robot that can do the same job with less risk, more consistent results, and a digital record of exactly what got cleaned and how well.

The Economics Behind the Pitch

Bozhan's own disclosed performance figures put a single Metis unit at roughly 700 square meters of hull cleaned per hour, with two units working in tandem reaching about 1,400 square meters per hour, a productivity rate the company says runs roughly seven times that of a single traditional diver. Those are company-reported numbers rather than independently audited figures, and procurement teams evaluating the claim should ask Bozhan for the underlying test conditions, hull-fouling severity and water visibility affect cleaning speed considerably, before treating the sevenfold multiplier as a universal benchmark. Even a more conservative real-world figure would still represent a meaningful labor-cost reduction for a shipowner currently paying diver day rates and vessel downtime for manual cleaning.

The robot's claimed centimeter-level underwater positioning, built from a combination of vision, inertial measurement, and odometry rather than GPS, which does not function underwater, is the technical detail that actually enables the productivity claim. A hull-cleaning robot that cannot precisely track which sections of a curved, often poorly lit hull surface it has already covered either wastes time re-cleaning the same patches or leaves gaps that undermine the fuel-efficiency case for using it at all. Bozhan says its system logs cleaning paths and coverage automatically, producing a standardized report a shipowner can file alongside maintenance records, a data layer manual diver cleaning has never reliably produced.

Protecting the Coating, Not Just the Hull

The harder technical problem in automated hull cleaning is not removing marine growth, it is removing it without damaging the antifouling coating underneath, since that coating is itself an expensive, carefully applied corrosion and biofouling barrier that a shipowner does not want stripped away by an overly aggressive cleaning pass. Bozhan's cavitation-jet cleaning approach, using pressurized water cavitation rather than abrasive brushes or blades to dislodge barnacles and shellfish, is positioned specifically around that tradeoff: strong enough to clear organic growth, gentle enough to preserve the coating across repeated cleaning cycles. Whether that balance holds up consistently across different coating types and growth severities over years of use is the kind of operational question that only shows up after sustained fleet deployment, not a funding announcement.

Real Customers, Named and Unnamed

Bozhan cites real-ship validation across several of China's busiest ports, Ningbo, Guangzhou's Nansha district, the Beibu Gulf, and Qingdao, with its newest-generation Metis system additionally tested at Yantai and Changshu. Two customer relationships give the funding round more commercial weight than the trial-site list alone: an unnamed large domestic energy shipowner running a live operation at Ningbo Port, and a Singapore-based marine underwater services operator with more than three decades of experience that says it compared several global suppliers before choosing Bozhan, with a stated plan to replace its existing cleaning solution with Bozhan's automated system within three years.

That Singapore customer detail is the more interesting signal for competitors to watch. An established regional service operator switching an entire existing solution out for a newer entrant's robot, rather than simply trialing it alongside an incumbent, is a stronger commercial validation than a pilot program, assuming the three-year replacement plan actually executes on schedule. Competing underwater-robotics vendors courting the same Southeast Asian and Chinese port markets should treat this relationship as evidence that Bozhan has cleared whatever technical and reliability bar a sophisticated, multi-supplier-comparing customer sets, not merely that it has a demo that works in a controlled trial.

A Company History Worth Clarifying

Funding reports describe Bozhan Robotics as founded in August 2026, while a separate 2025 press account describes a similarly named Shanghai entity, Bozhan Technology, with eighteen intellectual-property filings and an origin dating to 2017. Whether these are the same company under a renamed or restructured corporate entity, a predecessor and successor relationship, or two genuinely distinct companies sharing a similar name has not been independently resolved by public reporting, and this analysis does not assert either account as the definitive company history. What is independently consistent across both accounts is the underlying hull-cleaning robotics product line and its multi-year presence in Chinese port trials, which suggests continuity of the underlying technology and team even if the exact corporate founding date remains unsettled.

What the Funding Actually Buys

Bozhan says the new capital goes toward three things: core product research and development, scaling manufacturing to produce units at commercial volume rather than hand-built trial units, and building out a global market and service network, the last of which matters disproportionately for a hardware company whose product needs to be serviced at ports on multiple continents. A hull-cleaning robot stranded without local service support after a breakdown is a liability a shipowner cannot easily tolerate, since cleaning schedules are tied to fixed maintenance windows that do not wait for a replacement part to clear customs.

The company's stated roadmap extends beyond cleaning into underwater inspection, maintenance, and rust removal, building toward what it describes as a lifecycle underwater-operations platform, with the cleaning-pass data feeding a digital ship-maintenance archive that could eventually support fleet-wide energy-efficiency tracking and carbon accounting. That is an ambitious extension from a single-purpose cleaning robot to a data platform shipowners might use for regulatory and efficiency reporting, and it is worth treating as a roadmap claim rather than a near-term product, since none of the inspection or rust-removal capabilities have been demonstrated in the same real-ship trials cited for the cleaning function.

What Competing Marine-Robotics Vendors Should Watch

For rival underwater and marine-robotics companies, the number worth tracking over the next year is not the funding amount but whether the Singapore operator's three-year replacement plan holds, since that single relationship is currently the strongest piece of third-party commercial validation behind an otherwise company-reported set of performance claims. A shipping or port operator evaluating automated hull-cleaning options today has a widening field of entrants making similar productivity claims, and the vendor that can show an existing customer actually decommissioning its prior solution, rather than running a parallel pilot indefinitely, will have the stronger procurement case the next time this category comes up for a buying decision.

Why Investors Are Betting on This Narrow a Niche

Underwater hull cleaning is a small, unglamorous corner of the broader marine-robotics market compared to the attention commanded by autonomous cargo ships or port-yard automation, which is precisely why Daotong Investment's decision to lead a funding round here is worth noting rather than dismissing as a minor deal. Hull cleaning is a recurring, non-discretionary cost every commercial shipowner already pays on a fixed schedule, which means a robotics company solving it does not need to create new demand or convince a buyer this is a problem worth paying to fix. It only needs to convince a buyer its automated solution is cheaper, safer, and more consistent than the diver-based status quo, a narrower and in some ways easier sell than most robotics categories chasing genuinely new use cases.

That narrowness is also the ceiling. Bozhan's addressable market is bounded by the global commercial shipping fleet's existing hull-cleaning spend, not by some larger, less-defined automation opportunity, which means the company's growth path runs through winning share from incumbent diving-service providers port by port and fleet by fleet rather than expanding a category from scratch. The roadmap extension into inspection, maintenance, and rust removal is best understood as an attempt to widen that ceiling before market saturation in cleaning alone caps the company's growth, which is a common and reasonable strategy for a hardware company but one that depends on executing well beyond the single product line this funding round is built around.

For a competing marine-robotics vendor sizing up whether to enter the same niche, the more useful comparison than Bozhan's funding total is its port-trial footprint: six named Chinese ports across roughly a year of testing, plus one real paying energy-sector customer and one committed Singapore services operator. That is a meaningfully more advanced commercial position than a company announcing a funding round off a lab demonstration alone, and it raises the bar for a new entrant trying to compete on claims rather than comparable field validation.

This analysis is for general information purposes only and does not constitute investment, legal, or professional advice. It synthesizes Bozhan Robotics' own public disclosure of the funding round and public market activity as of November 2026.