# Top 32 Water Tech Startups Worldwide by Funding (2026)

> The 32 best-funded water tech startups worldwide, ranked by total funding raised: $588M combined. With founding year, headquarters and each company's rounds.

Source: https://millionrounds.com/top-lists/water-tech-startups (Millionrounds; every figure on the page links to its filing or article)

- 1 [**Rainmaker** Rainmaker is a New York-based crypto and DeFi company that specializes in a mobile-first, account-abstraction wallet.](https://millionrounds.com/company/rainmaker) Rainmaker is a New York-based crypto and DeFi company that specializes in a mobile-first, account-abstraction wallet. *Founded* 2022 New York, United States **$126M** last round Sept 2026
- 2 [**Wint**](https://millionrounds.com/company/wint) *Founded* - Sweden **$71M** last round Sept 2026
- 3 [**Hydrosat** Hydrosat is a deep-tech and climate technology company focused on Earth Observation through advanced thermal infrared satellite imagery and AI-powered analytics.](https://millionrounds.com/company/hydrosat) Hydrosat is a deep-tech and climate technology company focused on Earth Observation through advanced thermal infrared satellite imagery and AI-powered analytics. *Founded* 2017 Earth City, United States **$70M** last round Sept 2026
- 4 [**ZwitterCo** ZwitterCo is a leader in advanced membrane solutions for industrial and agricultural water treatment, founded in 2018 as a spinout from Tufts University.](https://millionrounds.com/company/zwitterco) ZwitterCo is a leader in advanced membrane solutions for industrial and agricultural water treatment, founded in 2018 as a spinout from Tufts University. *Founded* 2018 Woburn, United States **$58M** last round Oct 2026
- 5 [**Claros Technologies** Claros Technologies is an advanced materials company that develops safe and sustainable products with zero toxic waste.](https://millionrounds.com/company/claros-technologies) Claros Technologies is an advanced materials company that develops safe and sustainable products with zero toxic waste. *Founded* 2018 Minneapolis, United States **$55M** last round Aug 2026
- 6 [**Pennsylvania American Water** Pennsylvania American Water provides high-quality and reliable water and wastewater services.](https://millionrounds.com/company/pennsylvania-american-water) Pennsylvania American Water provides high-quality and reliable water and wastewater services. *Founded* 1965 Camden, United States **$43M** last round Oct 2026
- 7 [**AquaVenture Holdings** AquaVenture Holdings is a water purification company that specializes in the service industry.](https://millionrounds.com/company/aquaventure-holdings) AquaVenture Holdings is a water purification company that specializes in the service industry. *Founded* 2006 United States **$30M** last round May 2015
- 8 [**Vital Lyfe** Vital Lyfe is a Climatech product manufacturing firm that develops systems to produce safe drinking water from a range of natural sources.](https://millionrounds.com/company/vital-lyfe) Vital Lyfe is a Climatech product manufacturing firm that develops systems to produce safe drinking water from a range of natural sources. *Founded* - Hawthorne, United States **$24M** last round Dec 2025
- 9 [**FarmBot**](https://millionrounds.com/company/farmbot) *Founded* - Australia **$22M** last round Aug 2026
- 10 [**CASTALIE** Castalie is a French impact company that specializes in sustainable water solutions for the hospitality, restaurant, and corporate sectors.](https://millionrounds.com/company/castalie) Castalie is a French impact company that specializes in sustainable water solutions for the hospitality, restaurant, and corporate sectors. *Founded* 2011 Boulogne-Billancourt, France **$15M** last round Jun 2020
- 11 [**SunCulture** SunCulture is a Kenyan agritech and climate-tech company founded in 2012, headquartered in Nairobi.](https://millionrounds.com/company/sunculture) SunCulture is a Kenyan agritech and climate-tech company founded in 2012, headquartered in Nairobi. *Founded* 2012 Nairobi, Kenya **$15M** last round Sept 2025
- 12 [**Aquanexa** Aquanexa is an industrial utility group that specializes in management, and digitalization of water networks, and associated assets.](https://millionrounds.com/company/aquanexa) Aquanexa is an industrial utility group that specializes in management, and digitalization of water networks, and associated assets. *Founded* - Milan, Italy **$9.3M** last round Jun 2025
- 13 [**DrizzleX** DrizzleX is an Israeli startup specializing in smart water technology, focusing on IoT-based water submetering solutions for multi-family residential buildings.](https://millionrounds.com/company/drizzlex) DrizzleX is an Israeli startup specializing in smart water technology, focusing on IoT-based water submetering solutions for multi-family residential buildings. *Founded* 2019 Santa Fe Springs, United States **$9.1M** last round Oct 2026
- 14 [**Subeca** Subeca is a smart water technology company that offers a fully wireless water management platform.](https://millionrounds.com/company/subeca) Subeca is a smart water technology company that offers a fully wireless water management platform. *Founded* 2016 Richardson, United States **$9.0M** last round Oct 2026
- 15 [**Solinas Integrity** Solinas Integrity is a Chennai-based deep-tech and climate-tech startup founded in 2018 by IIT Madras alumni.](https://millionrounds.com/company/solinas-integrity) Solinas Integrity is a Chennai-based deep-tech and climate-tech startup founded in 2018 by IIT Madras alumni. *Founded* 2018 Chennai, India **$5.5M** last round Aug 2025
- 16 [**Hello Klean**](https://millionrounds.com/company/hello-klean) *Founded* 2020 United Kingdom **$5.0M** last round Mar 2026
- 17 [**Mimbly** We are a Sweden-based cleantech company with a mission to provide the best and most sustainable water and microplastic solutions to the world, helping businesse](https://millionrounds.com/company/mimbly) We are a Sweden-based cleantech company with a mission to provide the best and most sustainable water and microplastic solutions to the world, helping businesse *Founded* 2017 Gothenburg, Sweden **$3.5M** last round Nov 2025
- 18 [**Solaq** Solaq International B.V.](https://millionrounds.com/company/solaq) Solaq International B.V. *Founded* 2023 Amsterdam, Netherlands **$3.5M** last round Sept 2025
- 19 [**HULO.ai** HULO.ai is a Dutch startup founded in 2021, specializing in WaterTech and DeepTech.](https://millionrounds.com/company/hulo-ai) HULO.ai is a Dutch startup founded in 2021, specializing in WaterTech and DeepTech. *Founded* 2021 Leeuwarden, Netherlands **$2.7M** last round Oct 2025
- 20 [**Enaxiom** Enaxiom is an Australian climate-tech company based in Sydney, founded in 2023.](https://millionrounds.com/company/enaxiom) Enaxiom is an Australian climate-tech company based in Sydney, founded in 2023. *Founded* 2023 Sydney, Australia **$1.8M** last round May 2026
- 21 [**Shadrinponds** Shadrin Ponds is an AI-native platform helping water-dependent companies manage risk, optimize resources, and advance water security.](https://millionrounds.com/company/shadrinponds) Shadrin Ponds is an AI-native platform helping water-dependent companies manage risk, optimize resources, and advance water security. *Founded* - Hamilton, United States **$1.8M** last round Aug 2025
- 22 [**Waterwhelm** Waterwhelm is an award-winning company that is commercialising a patent-protected membrane technology for wastewater treatment.](https://millionrounds.com/company/waterwhelm) Waterwhelm is an award-winning company that is commercialising a patent-protected membrane technology for wastewater treatment. *Founded* 2018 Edinburgh, United Kingdom **$1.5M** last round Mar 2025
- 23 [**Kara Water** Kara Water manufactures air-to-water devices and self-refilling coffee machines that extract water from air and add minerals.](https://millionrounds.com/company/kara-water) Kara Water manufactures air-to-water devices and self-refilling coffee machines that extract water from air and add minerals. *Founded* 2017 New York, United States **$1.5M** last round Jun 2026
- 24 [**Watergate** Watergate is a climate technology product manufacturing company.](https://millionrounds.com/company/watergate) Watergate is a climate technology product manufacturing company. *Founded* 2023 London, United Kingdom **$857K** last round Aug 2025
- 25 [**Augen** Augen provides innovative water analysis and treatment solutions, driven by a mission to ensure clean drinking water.](https://millionrounds.com/company/augen) Augen provides innovative water analysis and treatment solutions, driven by a mission to ensure clean drinking water. *Founded* - Rio Grande, Brazil **$835K** last round Jul 2023
- 26 [**NovNat** NovNat develops advanced materials and systems for atmospheric water harvesting.](https://millionrounds.com/company/novnat) NovNat develops advanced materials and systems for atmospheric water harvesting. *Founded* - Birmingham, United Kingdom **$775K** last round Mar 2025
- 27 [**Safe H2O Inc.** Access to safe drinking water is a serious global challenge.](https://millionrounds.com/company/safe-h2o-inc) Access to safe drinking water is a serious global challenge. *Founded* 2013 San Jose, United States **$700K** last round Jan 2014
- 28 [**Drink Purely PVT Limited** We provides high-quality water services, ensuring clean, safe, and pure drinking water for homes and businesses.](https://millionrounds.com/company/drink-purely-pvt-limited) We provides high-quality water services, ensuring clean, safe, and pure drinking water for homes and businesses. *Founded* - Brzeg, Poland **$500K** last round Oct 2022
- 29 [**Watermarq** A new approach to valuing water](https://millionrounds.com/company/watermarq) A new approach to valuing water *Founded* 2018 Oxford, United Kingdom **$489K** last round Mar 2023
- 30 [**Esular** Esular is a Turkish technology company founded in 2018, specializing in smart agriculture, IoT, and AI-driven water management solutions.](https://millionrounds.com/company/esular) Esular is a Turkish technology company founded in 2018, specializing in smart agriculture, IoT, and AI-driven water management solutions. *Founded* 2019 Istanbul, Türkiye **$175K** last round Aug 2023
- 31 [**WellsForAll**](https://millionrounds.com/company/wellsforall) *Founded* - Ghana **$150K** last round Jan 2026
- 32 [**Rapid Radicals Technology** Rapid Radicals Technology develops wastewater treatment technology for municipal sewerage districts to address combined sewer overflows.](https://millionrounds.com/company/rapid-radicals-technology) Rapid Radicals Technology develops wastewater treatment technology for municipal sewerage districts to address combined sewer overflows. *Founded* 2016 Milwaukee, United States **$100K** last round Jun 2022

**Total funding** how the list is ranked

**15 November 2026** updated nightly

**Rounds we track** source: Millionrounds

Companies whose funding rounds we classed as this sector, ranked by the total they have raised in rounds we hold. Nobody pays to be on a list.

## Who backed them?

Open any company for its rounds and investors, or search the investors who back water tech startups worldwide in the app, with filters, lists and exports.

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## More lists worldwide

[See all](https://millionrounds.com/top-lists?r=Global)

[*GV* *V* *RP* **Health startups worldwide** 12,811 companies · $81B](https://millionrounds.com/top-lists/health-startups)[*O* *A* *X* **AI startups worldwide** 10,238 companies · $830B](https://millionrounds.com/top-lists/ai-startups)[*GV* *V* *RP* **Biotech startups worldwide** 7,127 companies · $70B](https://millionrounds.com/top-lists/biotech-startups)[*D* *B* *FT* **Big data startups worldwide** 3,812 companies · $220B](https://millionrounds.com/top-lists/big-data-startups)[*AF* *R* *S* **Fintech startups worldwide** 3,200 companies · $94B](https://millionrounds.com/top-lists/fintech-startups)[*O* *A* *B* **AI startups that raised in 2026** 2,922 companies · $540B in 2026](https://millionrounds.com/top-lists/ai-startups-raised-2026)[*FT* *CE* *P* **Energy providers startups worldwide** 2,808 companies · $152B](https://millionrounds.com/top-lists/energy-providers-startups)[*A* *P* *O* **Marketing tech startups worldwide** 2,728 companies · $28B](https://millionrounds.com/top-lists/marketing-tech-startups)