Top 18 Energy Saving startups in USA
Feb 24, 2026
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27
1
Funding: $4M
HomeBoost offers a do-it-yourself energy assessment system that helps homeowners identify leaky windows and find rebate opportunities and other ways to cut their energy bills. It ships to homeowners custom hardware that, coupled with a smartphone app, scans the home and then home energy experts review and produce the report.
HomeBoost offers a do-it-yourself energy assessment system that helps homeowners identify leaky windows and find rebate opportunities and other ways to cut their energy bills. It ships to homeowners custom hardware that, coupled with a smartphone app, scans the home and then home energy experts review and produce the report.
2
Funding: $575.5M
Arcadia Power is a nationwide home energy platform providing clean energy and savings.
Arcadia Power is a nationwide home energy platform providing clean energy and savings.
3
Funding: $491.5M
Turntide‘s Smart Motor System optimizes motor energy use and helps eliminate mechanical issues.
Turntide‘s Smart Motor System optimizes motor energy use and helps eliminate mechanical issues.
4
Funding: $443.5M
Electra is decarbonizing the steel industry by reducing power consumption of electric arc furnaces. It allows to start and stop production on demand and uses the lowest-cost, intermittent renewable electricity to reduce energy costs.
Electra is decarbonizing the steel industry by reducing power consumption of electric arc furnaces. It allows to start and stop production on demand and uses the lowest-cost, intermittent renewable electricity to reduce energy costs.
5
Funding: $403.7M
Boston Metal is a metals production company that develops an electric-powered tech to decarbonize steelmaking and metal production.
Boston Metal is a metals production company that develops an electric-powered tech to decarbonize steelmaking and metal production.
6
Funding: $382M
Budderfly is an energy management company with devices that measure and report on all elements of energy use.
Budderfly is an energy management company with devices that measure and report on all elements of energy use.
7
Funding: $174.6M
Sense is offering home owners better insight into their energy usage levels, so they can adjust accordingly. The tech, which relies on AI/ML, works with smart meters from companies like Landis+Gyr and Schneider Electric.
Sense is offering home owners better insight into their energy usage levels, so they can adjust accordingly. The tech, which relies on AI/ML, works with smart meters from companies like Landis+Gyr and Schneider Electric.
8
Funding: $133M
Viridi, which operates through Green Machine Equipment and Volta Energy Products, builds renewable energy products and systems that substitute for fossil fuel, lead-acid batteries and other older technology.
Viridi, which operates through Green Machine Equipment and Volta Energy Products, builds renewable energy products and systems that substitute for fossil fuel, lead-acid batteries and other older technology.
9
Funding: $119M
Aeroseal seals both air ducts and building envelopes so you waste less energy and reduce your bill
Aeroseal seals both air ducts and building envelopes so you waste less energy and reduce your bill
10
Funding: $108.3M
GoExpedi is a platform for the oil and gas industry to more efficiently procure critical parts and supplies
GoExpedi is a platform for the oil and gas industry to more efficiently procure critical parts and supplies
11
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.
12
Funding: $28M
Sapphire Technologies develops, manufactures, and sells energy recovery systems for both natural gas and hydrogen industrial applications.
Sapphire Technologies develops, manufactures, and sells energy recovery systems for both natural gas and hydrogen industrial applications.
13
Funding: $25.9M
AeroShield Materials is creating thermally insulating transparent inserts. The inserts are only four millimeters of AeroShield's material and, when placed inside a double-pane window, provides 65 percent more energy efficiency.
AeroShield Materials is creating thermally insulating transparent inserts. The inserts are only four millimeters of AeroShield's material and, when placed inside a double-pane window, provides 65 percent more energy efficiency.
14
Funding: $6.5M
InPipe Energy enable water agencies to manage pressure while producing renewable energy-turning excess pressure into a revenue stream.
InPipe Energy enable water agencies to manage pressure while producing renewable energy-turning excess pressure into a revenue stream.
15
Funding: $5.5M
INOVUES is a window technology company that provides the only solution that enables existing building facades to be retrofitted with the latest energy-saving and smart glass innovations without removal or replacement
INOVUES is a window technology company that provides the only solution that enables existing building facades to be retrofitted with the latest energy-saving and smart glass innovations without removal or replacement
16
Funding: $24K
GELF Energy has redesigned the anaerobic digestion process with the development of a system called the Microbial Energy Device, which produces higher quality methane in one-tenth the time, at doubled efficiency, with nature-based carbon capture technology.
GELF Energy has redesigned the anaerobic digestion process with the development of a system called the Microbial Energy Device, which produces higher quality methane in one-tenth the time, at doubled efficiency, with nature-based carbon capture technology.
17
MeterLeader is an online portal that offers online challenges integrated with real-time electricity data to motivate people to save energy.
18
EEtility works with utilities to finance efficiency upgrades--often as simple as new insulation and caulking.
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