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Top 44 Energy-efficient heating startups
Sep 28, 2025 | By Alexander Gillet | 28 |
These startups develop smart heating systems for buildings and houses, and industrial heat utilizing technologies.
1
Country: USA | Funding: $5M
Dig Energy produces purpose-built drilling technology to create highly efficient geothermal heating and cooling systems.
Dig Energy produces purpose-built drilling technology to create highly efficient geothermal heating and cooling systems.
2
Country: Sweden | Funding: $710M
Aira operates as a clean energy-tech company driving the clean energy revolution with air source heat pumps.
Aira operates as a clean energy-tech company driving the clean energy revolution with air source heat pumps.
3
Country: Germany | Funding: €652M
1Komma5° is aiming to offer households everything needed for a carbon neutral home, including energy storage, charging infrastructure for electric vehicles and solar.
1Komma5° is aiming to offer households everything needed for a carbon neutral home, including energy storage, charging infrastructure for electric vehicles and solar.
4
Country: UK | Funding: £447M
OVO Energy is an independent energy technology company and supplier. OVO also installs world’s most advanced storage heaters
OVO Energy is an independent energy technology company and supplier. OVO also installs world’s most advanced storage heaters
5
Country: UK | Funding: $468.9M
Hometree operates as an online-led boiler installation company.
Hometree operates as an online-led boiler installation company.
6
Country: USA | Funding: $266.6M
BlocPower is offering smart, all electric heating, cooling, and hot water systems to building owners for no money down.
BlocPower is offering smart, all electric heating, cooling, and hot water systems to building owners for no money down.
7
Country: UK | Funding: £200M
Deep Green has developed a “digital boiler” technology to use the heat produced by data centers for swimming pools, apartment blocks, distilleries, laundrettes, and bakeries.
Deep Green has developed a “digital boiler” technology to use the heat produced by data centers for swimming pools, apartment blocks, distilleries, laundrettes, and bakeries.
8
Country: Germany | Funding: $250.1M
Tado° offers smart thermostats and apps that adjusts to the real-time behavior of residents in private homes and small businesses.
Tado° offers smart thermostats and apps that adjusts to the real-time behavior of residents in private homes and small businesses.
9
Country: USA | Funding: $162.3M
Rondo Energy invented new, surprisingly simple solution to the critical need for low cost, zero-carbon heat.
Rondo Energy invented new, surprisingly simple solution to the critical need for low cost, zero-carbon heat.
10
Country: Sweden | Funding: $156M
Qvantum is a comprehensive supplier of innovative and efficient electric heat-pumps.
Qvantum is a comprehensive supplier of innovative and efficient electric heat-pumps.
11
Country: USA | Funding: $134.5M
Dandelion is an Alphabet spinout that develops geothermal heating, air-conditioning and cooling systems
Dandelion is an Alphabet spinout that develops geothermal heating, air-conditioning and cooling systems
12
Country: USA | Funding: $97.5M
Sealed covers the upfront costs to install energy-saving upgrades like insulation, smart tech, and HVAC to make your house feel like new.
Sealed covers the upfront costs to install energy-saving upgrades like insulation, smart tech, and HVAC to make your house feel like new.
13
Country: Canada | Funding: $75.1M
BrainBox AI utilizes cloud-based computing, algorithms, and a proprietary process to create an autonomous building technology.
BrainBox AI utilizes cloud-based computing, algorithms, and a proprietary process to create an autonomous building technology.
14
Country: France | Funding: €48M
Qarnot designs and develops Q.rad, a computing heater embedding microprocessors as a heat source and connected to the Internet.
Qarnot designs and develops Q.rad, a computing heater embedding microprocessors as a heat source and connected to the Internet.
15
Country: USA | Funding: $42M
Quilt is building a sleek and AI-driven ductless heat pump system for the home.
Quilt is building a sleek and AI-driven ductless heat pump system for the home.
16
Country: Ireland | Funding: $36.9M
Exergyn is a clean-tech company that develops waste heat recovery and conversion technology.
Exergyn is a clean-tech company that develops waste heat recovery and conversion technology.
17
Country: USA | Funding: $35.9M
Radiator Labs invented Cozy - a wireless, low-cost and easily installed retrofit that drops on top of steam heat radiators, providing a solution to the chronic problem of uneven heating in apartment buildings. Installation throughout a building can save up to 45 percent in heating costs and reduce GHG emissions by an average of 25 percent.
Radiator Labs invented Cozy - a wireless, low-cost and easily installed retrofit that drops on top of steam heat radiators, providing a solution to the chronic problem of uneven heating in apartment buildings. Installation throughout a building can save up to 45 percent in heating costs and reduce GHG emissions by an average of 25 percent.
18
Country: Netherlands | Funding: €29.8M
Quatt designs AI-powered smart hybrid heat pumps to accelerate the decrease of gas consumption.
Quatt designs AI-powered smart hybrid heat pumps to accelerate the decrease of gas consumption.
19
Country: UK | Funding: £24.4M
Naked Energy has developed an innovative hybrid solar technology generating combined heat and power.
Naked Energy has developed an innovative hybrid solar technology generating combined heat and power.
20
Country: Germany | Funding: €25.5M
Kraftblock is the energy storage, based on a bottom-up materials-development, which enables the energy transition to 100% renewables in an ecological and economical sensfull way.
Kraftblock is the energy storage, based on a bottom-up materials-development, which enables the energy transition to 100% renewables in an ecological and economical sensfull way.
