The most expensive barnacle in the world is the one you have to sail into a port to scrape off. For a large container ship, the scheduling, tug fees, and lost revenue from a day in drydock can easily run into the hundreds of thousands. Meanwhile, the barnacle is just sitting there, quietly increasing the ship’s fuel bill by up to 17 percent [ITU AI for Good, March 2026].
CRABI Robotics, a Boston startup spun out of MIT, thinks the whole exercise is backwards. Its bet is a robot called CRABI, short for Crud Removal Autonomous Brushing Instrument. It is designed to latch onto a vessel’s hull while the ship is underway, scrub off the biofouling, and deliver an inspection report, all without the captain altering course. The company’s pitch is simple: turn hull maintenance from a disruptive, expensive port event into a weekly, automated service that happens while the asset is doing its job.
The physics of a sticky problem
Biofouling, the accumulation of marine organisms on submerged surfaces, is more than an aesthetic issue. It creates drag, which forces engines to burn more fuel to maintain speed. The International Maritime Organization has been tightening efficiency standards for years, and a dirty hull directly hurts a ship’s Carbon Intensity Indicator score. The traditional solution is periodic cleaning in port, often involving divers or drydocking, which is costly and can damage specialized hull coatings.
CRABI’s technical wedge is its ability to operate at sea. The robot uses active permanent magnet control to attach to any hull geometry, and its wing surfaces are designed to turn water flow into an attraction force as speed increases, allowing it to stay put at up to 24 knots [CRABI Robotics, retrieved 2026]. It cleans with high-pressure waterjets, which the company says are safe for all common hull coatings. The claimed cleaning rate is 400 square meters per hour [CRABI Robotics, retrieved 2026]. For a very large crude carrier with a hull area exceeding 10,000 square meters, the math suggests a multi-day job, but one that can be broken into weekly sessions without downtime.
From MIT lab to shipping partner
The company’s origins trace to MIT, where the technology was developed before being licensed and spun out [MIT Technology Licensing Office, 2025]. The founding team is led by CEO Levi Gershon, an MIT alumnus and Forbes 30 Under 30 honoree, and co-founder Santiago Hirschmann, a product-focused mechanical engineer with an MBA from Kellogg [Forbes, retrieved 2026] [LinkedIn, retrieved 2026].
Traction, so far, is measured in strategic partnerships rather than fleet-wide deployments. In July 2025, Monaco-based shipowner C Transport Maritime S.A.M. (CTM) became both an investor and a pilot partner, working to validate the in-motion cleaning on its fleet [Inspenet, July 2025]. A more recent signal came in September 2026, when CRABI was named a winner of the CMA CGM Startup Awards, securing an opportunity for a funded pilot or proof of concept with the global shipping giant [CMA CGM Group, September 2026]. These deals follow an undisclosed seed round closed in August 2025, with backing from a consortium including Xfund, E14 Fund, and Gaingels [PERPLEXITY SONAR PRO BRIEF].
| Partner | Type | Date | Key Detail |
|---|---|---|---|
| C Transport Maritime (CTM) | Investor & Pilot Partner | July 2025 | Validating in-motion cleaning on its fleet [Inspenet, July 2025] |
| CMA CGM Group | Award Winner / Pilot Opportunity | September 2026 | Winner of CMA CGM Startup Awards, securing a path to a funded pilot [CMA CGM Group, September 2026] |
| ZEBOX | Accelerator | Not Specified | Part of the support package from the CMA CGM award [CMA CGM Group, September 2026] |
The unit economics of a clean hull
The financial case rests on the staggering cost of fuel and downtime. CRABI claims its system can save a cleaned vessel more than $2 million annually, with another company profile citing potential savings of up to $3 million per ship per year [ITU AI for Good, March 2026] [PERPLEXITY SONAR PRO BRIEF]. These are company-reported figures, but the underlying drivers are well-established. A mid-sized container ship can burn over $10,000 worth of fuel per day. If a fouled hull adds 10% to that burn rate, the penalty is $1,000 daily. Over a year, that’s $365,000 in extra fuel alone, before accounting for the $200,000-plus cost and revenue loss of a port cleaning.
The company describes the total addressable market for marine biofouling as $26 billion, with the potential to reduce global annual greenhouse gas emissions by 0.5% if widely deployed [CRABI Robotics, retrieved 2026]. The real prize for ship operators is turning a cost center into a predictable, performance-enhancing service.
Where the barnacles could stick
For all its elegant engineering, CRABI’s path is littered with the hard realities of selling complex hardware to a conservative industry. The risks are not trivial.
- Operational validation. Pilots with CTM and CMA CGM are crucial first steps, but they are not yet paid, at-scale deployments. The system must prove it can operate reliably in the harsh, variable conditions of the open ocean,not just in a test basin.
- Sales motion. Convincing shipowners to install a deck-mounted launch and recovery unit represents a significant capital commitment and operational change. The sales cycle will be long, requiring deep trust in the technology’s safety and return on investment.
- Competitive response. While no direct competitors are named in available sources, the incumbent is the entire port-based cleaning industry. Furthermore, other in-transit cleaning technologies using different methods, like cavitation jets or large rotating brushes, could emerge or already be in development.
The company’s most plausible answer to these challenges is its focus on partnerships with forward-leaning shipowners like CTM and CMA CGM. Success with these early adopters would provide the case studies and references needed to move the rest of the market.
The next twelve months
The immediate roadmap is clear: execute the promised pilots and convert them into the first commercial contracts. The backing from maritime-focused funds like E14 and the Physical AI Fellowship suggests investors are betting on the team’s ability to navigate this sector. Headcount is growing, with a careers page listing openings for operators, engineers, and developers [CRABI Robotics, retrieved 2026].
Doing a back-of-the-envelope check on the climate math is instructive. If a single large ship saves 1,000 metric tons of fuel annually thanks to a clean hull (a conservative estimate), that’s roughly 3,200 tons of CO2 avoided. Scale that to a fleet of 100 ships, and you’re looking at 320,000 tons,the annual emissions of a small city. The unit of impact isn’t the robot; it’s the ton of fuel not burned.
For CRABI to succeed, it must ultimately beat not another startup, but the calendar in a port captain’s office. Its competition is the entrenched, if inefficient, ritual of drydocking. The bet is that in an industry squeezed by fuel costs and carbon regulations, the economics of cleaning while sailing will become too compelling to ignore.
Sources
- [CRABI Robotics, retrieved 2026] CRABI Robotics, AI Inspections & Hull Cleaning, In Transit | https://www.crabi-robotics.com/
- [ITU AI for Good, March 2026] CRABI Robotics | https://aiforgood.itu.int/speaker/crabi-robotics/
- [Inspenet, July 2025] CTM partners with CRABI Robotics for hull cleaning in motion | https://inspenet.com/en/news/ctm-partners-with-crabi-robotics-for-hull-cleaning-in-motion/
- [CMA CGM Group, September 2026] CMA CGM Startup Awards: six winning startups driving innovation in shipping, logistics, media, humanitarian action and education | https://www.cmacgm-group.com/en/news-media/cma-cgm-startup-awards-six-winning-startups-driving-innovation-shipping-logistics-media-humanitarian-action-and-education
- [MIT Technology Licensing Office, 2025] Crabi Robotics | MIT Technology Licensing Office | https://tlo.mit.edu/industry-entrepreneurs/startups/crabi-robotics
- [Forbes, retrieved 2026] Levi Gershon | https://www.forbes.com/profile/levi-gershon/
- [LinkedIn, retrieved 2026] Santiago Hirschmann - Mechanical engineer | Kellogg MBA | https://www.linkedin.com/in/santiagohirschmann/
- [PERPLEXITY SONAR PRO BRIEF] CRABI Robotics Brief
- [CRABI Robotics, retrieved 2026] Careers | https://www.crabi-robotics.com/careers