# Top 50 Cooling Tech Startups Worldwide by Funding (2026)

> The 50 best-funded cooling tech startups worldwide, ranked by total funding raised: $719M combined. With founding year, headquarters and each company's rounds.

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

- 1 [**Submer** Submer is a cleantech company based in Barcelona, founded in 2015 by Daniel Pope and Pol Valls.](https://millionrounds.com/company/submer) Submer is a cleantech company based in Barcelona, founded in 2015 by Daniel Pope and Pol Valls. *Founded* 2015 Rubi, Spain **$76M** last round Dec 2024
- 2 [**Accelsius** Accelsius is a technology company based in Austin, Texas, specializing in advanced liquid cooling solutions for data centers, high-performance computing (HPC),](https://millionrounds.com/company/accelsius) Accelsius is a technology company based in Austin, Texas, specializing in advanced liquid cooling solutions for data centers, high-performance computing (HPC), *Founded* 2022 Austin, United States **$65M** last round Jan 2026
- 3 [**Turbine Air Systems** Turbine Air Systems designs and manufactures modular cooling and energy systems for a wide range of industries.](https://millionrounds.com/company/turbine-air-systems) Turbine Air Systems designs and manufactures modular cooling and energy systems for a wide range of industries. *Founded* 1999 Houston, United States **$62M** last round Sept 2013
- 4 [**Dandelion Energy** Dandelion Energy is a leading residential geothermal company based in Mount Kisco, New York.](https://millionrounds.com/company/dandelion-energy) Dandelion Energy is a leading residential geothermal company based in Mount Kisco, New York. *Founded* 2017 Mount Kisco, United States **$56M** last round Jul 2026
- 5 [**Iceotope** Iceotope is a Sheffield-based technology company founded in 2005, specializing in precision liquid cooling solutions for data centers, high-performance computin](https://millionrounds.com/company/iceotope) Iceotope is a Sheffield-based technology company founded in 2005, specializing in precision liquid cooling solutions for data centers, high-performance computin *Founded* 2005 Catcliffe, United Kingdom **$48M** last round Jul 2022
- 6 [**BeneChill** BeneChill is a medical device company developing non-invasive cooling technologies for the healthcare industry.](https://millionrounds.com/company/benechill) BeneChill is a medical device company developing non-invasive cooling technologies for the healthcare industry. *Founded* 2004 United States **$36M** last round Feb 2013
- 7 [**TitanX Engine Cooling** TitanX Engine Cooling provides engine cooling solutions to trucks, buses, off-highway equipment and industrial diesel engine manufacturers.](https://millionrounds.com/company/titanx-engine-cooling) TitanX Engine Cooling provides engine cooling solutions to trucks, buses, off-highway equipment and industrial diesel engine manufacturers. *Founded* 1961 Sölvesborg, Sweden **$29M** last round Mar 2013
- 8 [**Corintis** Corintis is a Swiss semiconductor technology company based in Lausanne, specializing in microfluidic cooling solutions for high-power chips used in artificial i](https://millionrounds.com/company/corintis) Corintis is a Swiss semiconductor technology company based in Lausanne, specializing in microfluidic cooling solutions for high-power chips used in artificial i *Founded* 2022 Lausanne, Switzerland **$25M** last round Dec 2025
- 9 [**Barocal** Barocal is a Cambridge University spin-out founded in 2019, focused on developing solid-state cooling and heating technologies.](https://millionrounds.com/company/barocal) Barocal is a Cambridge University spin-out founded in 2019, focused on developing solid-state cooling and heating technologies. *Founded* 2019 Cambridge, United Kingdom **$23M** last round May 2026
- 10 [**Water Horizon** Water Horizon is a French deep-tech startup focused on sustainable energy solutions, particularly in industrial waste heat recovery and low-carbon cooling and heating.](https://millionrounds.com/company/water-horizon) Water Horizon is a French deep-tech startup focused on sustainable energy solutions, particularly in industrial waste heat recovery and low-carbon cooling and heating. *Founded* 2017 Cugnaux, France **$21M** last round Nov 2025
- 11 [**LiquidStack** LiquidStack isa liquid cooling that provides hyperscale, edge, and computing.](https://millionrounds.com/company/liquidstack) LiquidStack isa liquid cooling that provides hyperscale, edge, and computing. *Founded* 2012 Marlborough, United States **$20M** last round Sept 2024
- 12 [**Geothermal International** Geothermal International is involved in the design and installation of heating and cooling systems.](https://millionrounds.com/company/geothermal-international) Geothermal International is involved in the design and installation of heating and cooling systems. *Founded* 2000 United Kingdom **$19M** last round Dec 2011
- 13 [**JETCOOL Technologies** JETCOOL Technologies is a hardware startup that develops compact cooling solutions for high-power electronics.](https://millionrounds.com/company/jetcool-technologies) JETCOOL Technologies is a hardware startup that develops compact cooling solutions for high-power electronics. *Founded* 2019 Littleton, United States **$17M** last round Oct 2023
- 14 [**Kiutra** kiutra GmbH is a deep-tech company based in Munich, Germany, focused on developing and manufacturing cryogen-free cooling solutions for quantum technologies.](https://millionrounds.com/company/kiutra) kiutra GmbH is a deep-tech company based in Munich, Germany, focused on developing and manufacturing cryogen-free cooling solutions for quantum technologies. *Founded* 2018 Munich, Germany **$15M** last round Oct 2025
- 15 [**Cooltech Applications** COOLTECH provides cleantech solutions based on magneto caloric cooling, replacing traditional gas cooling systems.](https://millionrounds.com/company/cooltech-applications) COOLTECH provides cleantech solutions based on magneto caloric cooling, replacing traditional gas cooling systems. *Founded* 2003 France **$12M** last round Dec 2013
- 16 [**Infinite Cooling** Infinite Cooling is a renewables and environment company that specializes in wastewater management and recycling.](https://millionrounds.com/company/infinite-cooling) Infinite Cooling is a renewables and environment company that specializes in wastewater management and recycling. *Founded* 2017 Cambridge, United States **$12M** last round Nov 2026
- 17 [**Bedrock Energy** Bedrock Energy is a clean-tech company based in Austin, Texas, founded in 2022.](https://millionrounds.com/company/bedrock-energy) Bedrock Energy is a clean-tech company based in Austin, Texas, founded in 2022. *Founded* 2022 Austin, United States **$12M** last round Jan 2025
- 18 [**Vigilent** Vigilent is a software company based in Oakland, California, specializing in AI-driven cooling plant optimization for data centers and mission-critical facilities.](https://millionrounds.com/company/vigilent) Vigilent is a software company based in Oakland, California, specializing in AI-driven cooling plant optimization for data centers and mission-critical facilities. *Founded* 2008 Oakland, United States **$11M** last round Jun 2013
- 19 [**NovoLINC** NovoLINC is a thermal interface materials startup located in Pittsburgh, Pennsylvania.](https://millionrounds.com/company/novolinc) NovoLINC is a thermal interface materials startup located in Pittsburgh, Pennsylvania. *Founded* - Pittsburgh, United States **$10M** last round Dec 2025
- 20 [**Attune Medical** Now part of Haemonetics!](https://millionrounds.com/company/attune-medical) Now part of Haemonetics! *Founded* 2009 Chicago, United States **$10M** last round Oct 2017
- 21 [**CoolIT Systems** CoolIT Systems is engaged in the design and manufacture of electronic cooling systems and system integration services.](https://millionrounds.com/company/coolit-systems) CoolIT Systems is engaged in the design and manufacture of electronic cooling systems and system integration services. *Founded* 2001 Calgary, Canada **$10M** last round Oct 2011
- 22 [**blue activity** Blue Activity GmbH is a CleanTech startup based in Heidelberg, Germany, founded in 2019.](https://millionrounds.com/company/blue-activity) Blue Activity GmbH is a CleanTech startup based in Heidelberg, Germany, founded in 2019. *Founded* 2021 Heidelberg, Germany **$9.8M** last round Mar 2026
- 23 [**Amulaire Thermal Technology** Amulaire Thermal Technology was established in June, 2011.](https://millionrounds.com/company/amulaire-thermal-technology) Amulaire Thermal Technology was established in June, 2011. *Founded* 2011 New Taipei City, United States **$9.5M** last round Apr 2009
- 24 [**Maxwell Labs** Maxwell Labs is pioneering high performance radiative cooling technology for next-generation data centers, transforming heat into light.](https://millionrounds.com/company/maxwell-labs) Maxwell Labs is pioneering high performance radiative cooling technology for next-generation data centers, transforming heat into light. *Founded* 2019 Saint Paul, United States **$7.9M** last round Feb 2026
- 25 [**Cryogenx** Cryogenx is a London-based medical device manufacturer established in 2019.](https://millionrounds.com/company/cryogenx) Cryogenx is a London-based medical device manufacturer established in 2019. *Founded* 2019 London, United Kingdom **$7.6M** last round Aug 2026
- 26 [**Sure Chill** SureChill is a technology company focused on providing innovative cold storage solutions for the healthcare and pharmaceutical sectors.](https://millionrounds.com/company/sure-chill) SureChill is a technology company focused on providing innovative cold storage solutions for the healthcare and pharmaceutical sectors. *Founded* 2009 Cardiff, United Kingdom **$6.5M** last round Jul 2019
- 27 [**Strataphy** Strataphy is a deep-tech geothermal cooling company based in Al Khobar, Saudi Arabia, founded in 2025.](https://millionrounds.com/company/strataphy) Strataphy is a deep-tech geothermal cooling company based in Al Khobar, Saudi Arabia, founded in 2025. *Founded* 2025 Al Khobar, Saudi Arabia **$6.0M** last round Nov 2025
- 28 [**MegaCool Technologies** Cooling AI efficiently with generative-designed, scalable hardware](https://millionrounds.com/company/megacool-technologies) Cooling AI efficiently with generative-designed, scalable hardware *Founded* - Leuven, Belgium **$5.9M** last round Feb 2026
- 29 [**Hysopt** Hysopt is a software company that offers HVAC simulation and calculation software to improve a building's heating and cooling installations.](https://millionrounds.com/company/hysopt) Hysopt is a software company that offers HVAC simulation and calculation software to improve a building's heating and cooling installations. *Founded* 2013 Deurne, Belgium **$5.5M** last round Nov 2022
- 30 [**Axiom Cloud** Axiom Cloud is an AI-powered refrigeration management software company based in San Jose, California.](https://millionrounds.com/company/axiom-cloud) Axiom Cloud is an AI-powered refrigeration management software company based in San Jose, California. *Founded* 2014 San Jose, United States **$5.0M** last round Feb 2024
- 31 [**Skycool Systems** SkyCool Systems is a cleantech company based in Mountain View, California, founded in 2016.](https://millionrounds.com/company/skycool-systems) SkyCool Systems is a cleantech company based in Mountain View, California, founded in 2016. *Founded* 2016 Mountain View, United States **$5.0M** last round Aug 2023
- 32 [**GridFree AI** GridFree AI is a data center infrastructure company based in The Woodlands, Texas, specializing in grid-independent power and cooling solutions for AI and hyper](https://millionrounds.com/company/gridfree-ai) GridFree AI is a data center infrastructure company based in The Woodlands, Texas, specializing in grid-independent power and cooling solutions for AI and hyper *Founded* 2025 Spring, United States **$5.0M** last round Jun 2025
- 33 [**Actasys** Actasys is a development-stage company based in Brooklyn, NY, specializing in advanced hardware and software solutions for sensor cleaning, thermal management c](https://millionrounds.com/company/actasys) Actasys is a development-stage company based in Brooklyn, NY, specializing in advanced hardware and software solutions for sensor cleaning, thermal management c *Founded* 2013 New York, United States **$5.0M** last round Dec 2020
- 34 [**Quoherent** Quoherent is a quantum computing startup located in Huntsville, Alabama.](https://millionrounds.com/company/quoherent) Quoherent is a quantum computing startup located in Huntsville, Alabama. *Founded* 2021 Winston-Salem, United States **$4.7M** last round Oct 2023
- 35 [**OctaiPipe** OctaiPipe is an AI-powered optimisation software solution that delivers up to 30% savings in cooling energy use with zero disruption.](https://millionrounds.com/company/octaipipe) OctaiPipe is an AI-powered optimisation software solution that delivers up to 30% savings in cooling energy use with zero disruption. *Founded* 2016 London, United Kingdom **$4.3M** last round Dec 2025
- 36 [**OxiCool** OxiCool develops environmentally-friendly cooling units and air conditioning technologies.](https://millionrounds.com/company/oxicool) OxiCool develops environmentally-friendly cooling units and air conditioning technologies. *Founded* 2006 United States **$3.8M** last round Mar 2014
- 37 [**Silent Power** Silent Power is a renewable energy company based in Bahrain, founded in 2019 and headquartered in Sanabis, Manama.](https://millionrounds.com/company/silent-power) Silent Power is a renewable energy company based in Bahrain, founded in 2019 and headquartered in Sanabis, Manama. *Founded* 2018 Manama, United States **$3.5M** last round Sept 2011
- 38 [**NeoCarbon** NeoCarbon is a Berlin-based climate tech company founded in 2021.](https://millionrounds.com/company/neocarbon) NeoCarbon is a Berlin-based climate tech company founded in 2021. *Founded* 2021 Berlin, Germany **$3.5M** last round Dec 2023
- 39 [**Tempronics** Tempronics develops solid-state cooling and power generation system that converts waste heat into electricity in automobiles and industrial processes.](https://millionrounds.com/company/tempronics) Tempronics develops solid-state cooling and power generation system that converts waste heat into electricity in automobiles and industrial processes. *Founded* 2006 Tucson, United States **$3.4M** last round Mar 2010
- 40 [**HYBRICO Energy Technologies** HYBRICO Energy Technologies is a software-enabled energy solutions provider based in Guatemala City.](https://millionrounds.com/company/hybrico-energy-technologies) HYBRICO Energy Technologies is a software-enabled energy solutions provider based in Guatemala City. *Founded* 2016 Ciudad de Guatemala, Guatemala **$3.2M** last round Dec 2023
- 41 [**Chromasun** Chromasun manufactures high temperature micro-concentrators for solar cooling and process heating applications.](https://millionrounds.com/company/chromasun) Chromasun manufactures high temperature micro-concentrators for solar cooling and process heating applications. *Founded* 2008 San Jose, United States **$3.0M** last round Apr 2010
- 42 [**STAC Technology** STACs Technology zero-emissions cooling solutions upcycle the District Energy industry's services and reach](https://millionrounds.com/company/stac-technology) STACs Technology zero-emissions cooling solutions upcycle the District Energy industry's services and reach *Founded* 2016 Hellerup, Denmark **$3.0M** last round Jul 2022
- 43 [**Nelumbo** Nelumbo is Providing radical, lasting technological improvements to the heating and cooling industry.](https://millionrounds.com/company/nelumbo) Nelumbo is Providing radical, lasting technological improvements to the heating and cooling industry. *Founded* 2015 Menlo Park, United States **$2.9M** last round May 2024
- 44 [**ThermoLift** ThermoLift is developing a disruptive and transformational thermally driven heat pump for heating cooling](https://millionrounds.com/company/thermolift) ThermoLift is developing a disruptive and transformational thermally driven heat pump for heating cooling *Founded* 2012 United States **$2.8M** last round Jul 2015
- 45 [**Baryon** Baryon develops energy efficiency technologies with applications in building cooling, water production, cold chain, and others.](https://millionrounds.com/company/baryon) Baryon develops energy efficiency technologies with applications in building cooling, water production, cold chain, and others. *Founded* - Wilmington, United States **$2.1M** last round Aug 2021
- 46 [**American DG Energy** American DG Energy Inc.](https://millionrounds.com/company/american-dg-energy) American DG Energy Inc. *Founded* 2001 Waltham, United States **$2.1M** last round Oct 2010
- 47 [**Gyre Energy** Gyre Energy is an Oxford-based company that develops AI-powered software solutions for the cooling and refrigeration industry.](https://millionrounds.com/company/gyre-energy) Gyre Energy is an Oxford-based company that develops AI-powered software solutions for the cooling and refrigeration industry. *Founded* 2025 London, United Kingdom **$2.1M** last round Jul 2026
- 48 [**Mater-AI** Mater-AI is a UK-based startup founded in 2023 that focuses on developing AI-driven thermoelectric materials.](https://millionrounds.com/company/mater-ai) Mater-AI is a UK-based startup founded in 2023 that focuses on developing AI-driven thermoelectric materials. *Founded* 2023 London, United Kingdom **$2.0M** last round Dec 2025
- 49 [**Harvest Thermal** Harvest Thermal develops a control system for home use that integrates heating, hot water, and cooling with thermal storage.](https://millionrounds.com/company/harvest-thermal) Harvest Thermal develops a control system for home use that integrates heating, hot water, and cooling with thermal storage. *Founded* 2019 Berkeley, United States **$2.0M** last round Sept 2024
- 50 [**SolarSub** SolarSub is an environmental firm that offers floating solar cooling system.](https://millionrounds.com/company/solarsub) SolarSub is an environmental firm that offers floating solar cooling system. *Founded* - Edinburgh, United Kingdom **$1.8M** last round Sept 2026

**Total funding** how the list is ranked

**15 November 2026** updated nightly

**Rounds we track** source: Millionrounds

Companies whose own description names this theme, ranked by the total they have raised in rounds we hold. Nobody pays to be on a list.

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