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Top 20 Thermal Energy Storage startups
Jul 20, 2025 | By Alexander Gillet | 12 |
TES startups leverage technologies such as phase change materials, sensible heat storage and thermal batteries to create energy storages.
1
Country: USA | Funding: $220M
Antora Energy is electrifying heavy industry with thermal energy storage for zero-carbon heat and power.
Antora Energy is electrifying heavy industry with thermal energy storage for zero-carbon heat and power.
2
Country: Norway | Funding: $131.5M
EnergyNest offers a truly game changing technology for storing thermal energy on a large scale.
EnergyNest offers a truly game changing technology for storing thermal energy on a large scale.
3
Country: UK | Funding: $43.5M
Sunamp is a company that provides industrial and residential heat battery storage systems.
Sunamp is a company that provides industrial and residential heat battery storage systems.
4
Country: Denmark | Funding: $26.6M
Hyme is maturing a grid-scale thermal energy storage solution based on molten salts to greatly improve the integration of sustainable energy in the energy system.
Hyme is maturing a grid-scale thermal energy storage solution based on molten salts to greatly improve the integration of sustainable energy in the energy system.
5
Country: USA | Funding: $24.3M
Electrified Thermal Solutions replace fossil fuels with renewable heat in every furnace, turbine, boiler and kiln to decarbonize industry.
Electrified Thermal Solutions replace fossil fuels with renewable heat in every furnace, turbine, boiler and kiln to decarbonize industry.
6
Country: USA | Funding: $19M
Fourth Power is an energy storage startup that uses thermal batteries.
Fourth Power is an energy storage startup that uses thermal batteries.
7
Country: UK | Funding: £14M
Cheesecake Energy is developing advanced thermal and compressed air energy systems to store energy.
Cheesecake Energy is developing advanced thermal and compressed air energy systems to store energy.
8
Country: France | Funding: €16.5M
ETC specializes in thermal storage, energetic efficiency, industrial wastes recovery high valuation and advanced materials characterization.
ETC specializes in thermal storage, energetic efficiency, industrial wastes recovery high valuation and advanced materials characterization.
9
Country: Australia | Funding: $15M
Making 24/7 renewables a reality through Thermal Energy Storage.
Making 24/7 renewables a reality through Thermal Energy Storage.
10
Country: USA | Funding: $12.8M
Harvest Thermal develops a control system for home use that integrates heating, hot water, and cooling with thermal storage.
Harvest Thermal develops a control system for home use that integrates heating, hot water, and cooling with thermal storage.
12
Country: Israel | Funding: $8M
Tigi is an domain of renewable thermal energy generation and storage for large heat users – commercial and industrial.
Tigi is an domain of renewable thermal energy generation and storage for large heat users – commercial and industrial.
13
Country: Switzerland | Funding: CHF3.1M
Cowa Thermal Solutions develops thermal energy storage technology based on phase-change materials.
Cowa Thermal Solutions develops thermal energy storage technology based on phase-change materials.
14
Country: USA | Funding: $2.8M
NETenergy is a thermal energy storage company that is creating a thermal battery designed to offset peak electricity load.
NETenergy is a thermal energy storage company that is creating a thermal battery designed to offset peak electricity load.
15
Country: Australia
1414 Degrees clean energy storage is set to reduce energy costs by increasing the efficiency of renewable generation and stabilising grid supply.1414 Degrees’ thermal energy storage system (TESS) is highly efficient, clean, scalable, sustainable and unlike any other energy storage system in the world.
1414 Degrees clean energy storage is set to reduce energy costs by increasing the efficiency of renewable generation and stabilising grid supply.1414 Degrees’ thermal energy storage system (TESS) is highly efficient, clean, scalable, sustainable and unlike any other energy storage system in the world.
16
Country: UK | Funding: $100K
Aed Energy is developing transformative longer-duration energy storage technology.
Aed Energy is developing transformative longer-duration energy storage technology.
17
Country: Hungary
HeatVentors developed a thermal energy storage tank based on phase change material technology called HeatTANK.
HeatVentors developed a thermal energy storage tank based on phase change material technology called HeatTANK.
18
Country: USA
Calectra is a Bay Area-based startup on a mission to electrify the heavy industry - at low cost.
Calectra is a Bay Area-based startup on a mission to electrify the heavy industry - at low cost.
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