Go Capital
Go Capital is a French deeptech venture capital (VC) firm in Rennes with a dedicated maritime, or blue economy, investment practice. Since 2023 it has backed early-stage water and ocean companies, from solar desalination to aquaculture monitoring. As of 2026 Go Capital has backed 3 water companies across its maritime funds.
Compiled by Antoine Walter, (don't) Waste Water, from official filings and direct intelligence in Leviathan.
The take
Go Capital is one of the older venture firms (don't) Waste Water tracks, founded in 2003 in Rennes as the deeptech investor of France's Grand Ouest, the western coast that runs from Brittany down through the Loire. Its route into water ran through the sea. A fund rooted in a region of ports, fishing fleets and shipyards drifted, almost naturally, toward the ocean economy, and in 2023 it spun up a fund built entirely around it.
Go Capital calls that fund Impact Océan Capital, a maritime-impact vehicle it launched in 2023 with a 30 million euro first close and a 70 million euro target, managed for the Banque Populaire network. The thesis is the blue economy, not water utilities: decarbonising marine transport, protecting ocean ecosystems, treating water and waste, and feeding people through aquaculture and seaweed rather than wild catch. Frédéric Le Guillou, the partner who runs the sea practice out of Rennes, has been financing maritime and ecological-transition companies here since 2015.
Go Capital writes the first institutional cheque, at seed and Series A, the earliest outside money a startup takes. The pattern across its water bets is hardware that either makes fresh water or guards it: OSMOSUN builds solar-powered reverse-osmosis units that desalinate seawater off-grid, TMW Technologies distils fresh water from brine using waste heat, and BiOceanOr reads the chemistry of fish farms in real time so growers can act before a pond crashes. It is a bet on physical water-tech for the coastline, not municipal pipes or software.
Go Capital deployed 25 million euros across its funds in 2025, a steady clip for a firm with over 200 million euros under management and offices spread from Rennes and Nantes to Marseille. For a newcomer, Go Capital is the rare generalist deeptech fund that built a real water practice rather than waving the climate flag from a slide, and the place to watch if you want to see how Europe finances the ocean economy at its riskiest, earliest stage.
Water Commitment Score
Compiled from official filings, third-party records, and direct intelligence from investors and founders, in Leviathan · recomputed monthly · as of Jun 2026.
How they invest
Portfolio · 3 water companies
Invests alongside
Highlighted = profiled on (don't) Waste Water.
Frequently asked
- What does Go Capital invest in?
- Go Capital invests in early-stage deeptech, digital and health startups across western France, plus maritime and blue economy companies nationwide through its Impact Océan Capital fund. Its water investments focus on hardware: solar-powered desalination, waste-heat desalination, and real-time water-quality monitoring for aquaculture, backed at seed and Series A.
- Who runs Go Capital?
- Go Capital was founded in 2003 and is led by managing partners including Bertrand Distinguin, its president, and Jérôme Gueret. Its maritime and water practice is run by partner Frédéric Le Guillou in Rennes, with investment director Clémentine Breysse covering the sea fund from Marseille.
- Where is Go Capital based?
- Go Capital is headquartered in Rennes, in the Brittany region of western France, with additional offices in Nantes, Caen, Paris and the south of France. Founded in 2003, it focuses on deeptech across France's Grand Ouest, or greater west, and runs a national maritime practice.
- How many water companies has Go Capital backed?
- Go Capital has backed 3 water companies tracked by (don't) Waste Water: OSMOSUN, TMW Technologies and BiOceanOr, spanning desalination and aquaculture water monitoring. It invests at seed and Series A, and (don't) Waste Water rates its water commitment at the highest Anchor tier.
- Is this Go Capital the same as Go Capital LLC in the United States?
- No. This profile covers the French deeptech and maritime venture capital firm founded in 2003 in Rennes, tracked in (don't) Waste Water's water-investor database. It is unrelated to similarly named American finance or lending companies that share the Go Capital name.