The blue economy is no longer limited to traditional activities such as fishing, shipping, or offshore energy. A new generation of startups is applying climate technology, AI, robotics, biotechnology, and advanced water treatment to make the use of oceans and water resources cleaner, safer, and more efficient.

EU-Startups’ 2026 coverage shows Europe’s blue economy attracting capital across a widening range of technologies and business models. Among the larger disclosed rounds were €17 million for cargo.one alongside its acquisition of ocean-freight platform Cargofive or €10 million for marine-biofuel developer Kvasir Technologies.

These deals form part of a broader funding landscape in which startups are tackling an increasingly diverse set of challenges linked to how Europe uses, manages and protects its water and marine resources.

From restoring coastal ecosystems and generating tidal power to removing hazardous pollutants, improving wastewater treatment, supporting aquaculture, automating maritime operations, and digitalising shipping workflows. The 10 startups featured below, founded between 2020 and 2026, show how innovation is reshaping the sector, in alphabetical order.

Apolownia is a Paris-based ClimateTech startup committed to making the world more environmentally responsible. It develops end-to-end coastal ecosystem restoration and blue carbon projects, including mangroves and seagrass, which help absorb carbon, reduce coastal flooding and erosion, improve water quality, and provide vital habitats for fish and other marine life.

Its projects use satellite imagery, drones, field data and AI to monitor ecosystem recovery, estimate carbon capture and verify environmental results in a clear, data-driven way. Founded in 2024, it has raised €1 million in funding.

Headquartered in Heidelberg, Blue Activity develops sustainable water treatment solutions for industrial cooling systems. Its technology replaces toxic biocides with natural microorganisms and uses biopolymer-based additives, supported by digital monitoring. This reduces chemical use, water and energy consumption, maintenance needs, and operating costs.

They promote cleaner industrial water use and reduce harmful substances discharged into the environment, contributing to healthier water resources and more sustainable industry. Founded in 2021, Blue Activity secured €8.5 million in funding.

Launched in 2024 in Oxford, Caudal Energy takes a bio-inspired approach to tidal power, using ocean currents to generate predictable renewable electricity. Its system replaces conventional rotating turbines with moving fins inspired by marine animals, offering a lower-impact solution with simpler installation and maintenance.

This activity matters because tidal energy provides a more predictable source of renewable power than solar and wind, which are more dependent on weather conditions. By harnessing ocean currents, Caudal Energy can support the transition away from fossil fuels while making sustainable use of marine resources. Its innovative approach has enabled them to raise €6.43 million in total funding.

Heidelberg-based Enzo focuses on preventing water damage before it becomes costly. Its one-drop sensor attaches to a building’s main water pipe. The startup uses AI to identify unusual water-use patterns and small leaks in real time, allowing homeowners, property managers, and insurers to act before major damage occurs.

Its activity is especially useful as early leak detection can prevent water waste, expensive repairs, and unnecessary use of materials and energy, contributing to more sustainable water management. Launched in 2021, Enzo raised €6.3 million in funding.

Lir Labs develops an AI-powered microscopy for wastewater treatment, turning microscopic activity in water into real-time operational insights. Its automated sensors use deep-learning models to identify changes in microorganisms and particles, allowing treatment plants to detect problems earlier and adjust processes before they become costly or disruptive.

Their approach to better wastewater monitoring can reduce pollution, unnecessary energy and chemical use, and the risk of poorly treated water reaching natural ecosystems. Founded in 2025 in London, Lir Labs raised €245k in funding.

Mirai Robotics is a Maritime Technology startup building AI-powered systems that allow boats and other maritime vehicles to operate with little or no human control. Its technology can guide vessels, process data from onboard sensors, and make real-time decisions during activities such as sea patrols, inspections, monitoring, and transport.

Its activity is relevant to the blue economy because it can make maritime operations safer, faster, and more efficient, particularly in remote or hazardous areas where deploying human crews can be costly or risky. Launched in 2025 in Bari, this innovative approach to maritime automation and safety has helped Mirai Robotics secure €3.6 million in funding.

Founded in 2023 in Ireland, Nernst Electric develops on-site oxygen generation for aquaculture. Its technology uses ceramic membranes to separate high-purity oxygen directly from the surrounding air, allowing fish farms to produce oxygen where it is needed instead of relying on costly deliveries. A reliable oxygen supply is essential for maintaining healthy fish and productive farming conditions, particularly at remote sites.

Its efficient way of producing oxygen can make aquaculture more reliable, cost-effective, and sustainable while reducing energy use and dependence on transported liquid oxygen. Nernst Electric has a total funding of €1.7 million.

NPHarvest has developed a new hardware solution for the collection and recycling of nutrients from wastewater, turning them into valuable ingredients for fertilisers. Installed at wastewater, biogas, and agricultural facilities, its system captures nitrogen and phosphorus that would otherwise be lost as waste and converts them into reusable resources. The technology can recover up to 90% of these nutrients while operating with relatively low energy use.

As excesses of nitrogen and phosphorus can pollute waterways and contribute to eutrophication, managing levels in the water is important. By recovering these nutrients before they reach the environment, NPHarvest supports cleaner aquatic ecosystems while creating a circular source of fertiliser. Founded in 2023 in Espoo, they raised €3.4 million in total funding.

Zürich-based Oxyle tackles some of the hardest-to-remove pollutants in water, particularly PFAS, also known as “forever chemicals”. Rather than simply filtering these substances out, the company’s treatment systems break them down at the molecular level, preventing them from being transferred into another waste stream. The technology is designed for contaminated groundwater and industrial wastewater across sectors such as chemicals, pharmaceuticals, semiconductors, and waste management.

Removing hazardous chemicals from wastewater helps prevent them from reaching rivers, groundwater, and marine ecosystems, supporting cleaner and safer water resources. Founded in 2020, Oxyle has raised €19 million in funding.

Founded in 2021 in Berlin, Tilla is a MaritimeTech startup bringing greater efficiency to crew changes in the shipping industry. Its digital platform brings voyage schedules, crew information, port services, flights, and travel requirements into one place, allowing shipping companies to plan and manage crew movements with fewer manual tasks, lower costs, and better coordination.

By digitalising a process still heavily dependent on spreadsheets, emails, and manual coordination, Tilla supports more efficient maritime operations and improves the working experience of seafarers. The company raised €4 million in total funding.

Episode 12 of the DGT podcast: Languages and Technology is now available.

How does a European Commission document become 24 equally valid language versions of itself?

Anna Holmén takes us behind the scenes with Ivana Zeljković and Iva Vatova-Ivanova from DG Translation’s Demand Management Unit. They reveal how translation work is planned and coordinated, how tight deadlines are managed, and how technology and human expertise come together to keep multilingual Europe running — with deadline compliance above 99%.

Step inside the engine room of EU multilingualism and discover the people and processes that make 24-language communication possible every day.

Tune in to hear more

As negotiations enter their final phase in Brussels, the ECB's electronic money project for 2029 transcends the technical aspects. It is a geopolitical imperative in the face of American payment giants.

The European Union's financial landscape is poised for its biggest transformation since the introduction of banknotes in 2002. The European Parliament, the Council, and the European Central Bank (ECB) are intensifying their discussions to finalize the regulatory framework for the digital euro. If the draft legislation is adopted as planned by the end of the year, the first large-scale practical tests with financial institutions will begin in the autumn of 2027.

The goal? Official rollout to citizens by 2029.

This gradual rollout is not accidental. It is designed to guarantee the stability of an interconnected banking system. The digital euro will not be a private or speculative cryptocurrency, but rather an electronic extension of fiat money, issued and guaranteed directly by the ECB. It will function as a direct complement to coins and banknotes, without ever replacing them.

For European citizens, this innovation will represent a public and sovereign alternative to the private tech and credit giants. In practical terms, everyone will be able to use these services directly through their own commercial bank's app.

The major technical advance lies in offline use.

Money transfers between devices will occur simply by being near each other, even without an internet connection or in the event of a power outage. This option will also guarantee complete confidentiality, since peer-to-peer transactions will not pass through commercial servers.

To reassure the traditional banking sector and prevent a massive flight of deposits during the crisis, the ECB will impose a strict limit. The current holding ceiling is €3,000 per person. Any excess amount received in this public wallet will automatically be transferred to the user's regular commercial bank account.

Beyond the technical aspects, the issue is crucial for the real economy, particularly for small and medium-sized enterprises (SMEs) and the tourism sector within the single market. Currently, almost all European merchants rely on payment infrastructures controlled by American companies, such as Visa and Mastercard. With each transaction, the local economy relinquishes a portion of its profit margins in intermediation fees.

The digital euro aims to break this dependence.

The European Parliament is pushing for acceptance fees imposed on merchants to be significantly lower than current rates, or even completely free for microtransactions.

Intra-European tourism will also benefit from increased fluidity. A traveler will be able to pay for their expenses instantly in any member state using their home country's electronic wallet, without friction, without going through third-party networks and without hidden cross-border fees.

Despite the Commission's optimistic pronouncements, the European banking sector remains on the defensive. Banks are concerned about the operational costs associated with upgrading their technological systems, but above all about the risk of liquidity loss if clients choose to place their funds under the direct custody of the central bank.

The decisions made in the coming months will therefore be highly political. The challenge will be to define the necessary economic incentives for banks to agree to distribute this currency. For the European Union, the 2029 deadline provides the necessary time to orchestrate this new era of financial autonomy and strategic sovereignty.