Top Energy Efficiency Startups in United States (2025 Update)

Explore the best Energy Efficiency companies in United States. Discover high-growth startups and investment opportunities in our 2025 updated list.

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Explore Top Energy Efficiency Startups in United States featuring 506 Companies

Showing 506 Companies

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BeChained - AI to eliminate wasted energy & carbon offset costs in manufacturing At BeChained, we want to be the Waymo (autonomous driving cars) for energy effic... - United States Flag United States Dover United States (HQ) + 1 2020 Blockchain, Energy +1 [email protected]
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63 (-100%) 1 year ago Pre Seed 5 369.5K 1131 5 months ago
FlexEnergy Solutions - Clean, efficient, rugged and ultra-reliable small gas turbines. FlexEnergy Solutions is a technology company that designs, manufactures, leases... - United States Flag United States Greenwood Village United States (HQ) 2000 Energy, Manufacturing +2 [email protected]
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1.7K (-11%) 10 years ago Private Equity 4 25.3M 2783 5 months ago
Xtreme Power Conversion C... - Protect your Business. Xtreme Power, a global provider of power quality solutions, is dedicated to prov... - United States Flag United States Denver United States (HQ) 1992 Energy, Energy Efficiency +1 -
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5.6K (33%) 11 years ago Debt Financing 8 71.8M 1940 7 months ago
Fineart LLC - Efficient and Innovative Solutions for a Greener Sustainable Future . At Fineart LLC, we advocate for a holistic approach to energy efficiency that go... - United States Flag United States Dunedin United States (HQ) 2022 Energy, Renewable Energy +3 [email protected]
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431 2 years ago Convertible Note 1 7.5M 206 9 P8u IcD
Element 16 Technologies - Element 16 improves energy efficiency at industrial processing facilities with h... Element 16 Technologies is a team of experienced engineers focused on powering a... - United States Flag United States Los Angeles United States (HQ) 2016 Energy, Manufacturing +4 [email protected]
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416 (-100%) 3 years ago Grant 7 7.7M 215 2 Mnu z8a
Hygge Power - Everyone safely powered -> Finally the right insight for energy customers with p... Hygge Power: Own Your Power

CO-Z: Everyone Powered See https://www.linkedin.com...
- United States Flag United States Boulder United States (HQ) 2017 Consumer Electronics, Energy Efficiency +1 [email protected]
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658 4 years ago Seed 7 2.5M 748 1 year ago
SparkMeter - We make it possible for utilities in developing markets to bring electricity to... SparkMeter offers comprehensive low-cost metering solutions for everything from... - United States Flag United States Washington United States (HQ) + 1 2013 Energy, Energy Efficiency -
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1.2K (-40%) 1 year ago Corporate Round 8 41.2M 8007 1 year ago
OffGridBox - We provide affordable clean water and renewable energy in remote areas. OffGridBox is the world's most powerful modular and compact unit that provides a... - United States Flag United States Somerville United States (HQ) + 2 2016 Payments, Renewable Energy +3 [email protected]
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1.7K (55%) 4 years ago Non Equity Assistance 7 2.6M 3058 7 months ago
WattIQ - Powering the future of asset-light and energy efficient enterprises. What if you could mine data from every electrical device in your enterprise just... - United States Flag United States South San Francisco United States (HQ) + 1 2013 Energy, IoT +1 [email protected]
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86 6 years ago Convertible Note 8 4.0M 1229 2 years ago
Copper Labs - Copper Labs empowers utilities and their customers by unlocking real-time data f... Copper Labs unlocks real-time data from existing electric, gas, and water meters... - United States Flag United States Boulder United States (HQ) 2016 Energy, Renewable Energy +1 [email protected]
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1.3K (8%) 2 years ago Series Unknown 6 10.5M 1422 9 months ago
Blue Line Battery - Engineering and manufacturing Lithium-ion power systems that eliminate the heada... Blue Line Battery develops intelligent Lithium-ion power systems that are more e... - United States Flag United States Whitewater United States (HQ) 2015 Manufacturing, Energy Efficiency +1 [email protected]
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1.5K (-17%) 3 years ago Seed 5 5.1M 1326 5 months ago
KILL CLIFF - Be savage. Drink Kill Cliff. Own it. KILL CLIFF is America's best tasting and best selling clean energy drink.  Found... - United States Flag United States Atlanta United States (HQ) 2007 Food and Beverage, Energy Efficiency [email protected]
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30.9K (-21%) 7 years ago Series Unknown 5 26.0M 6310 6 months ago
Enernet Global - Independent Power Producer (IPP) Renewable Hybrid Microgrids Long Term Power Pur... Enernet provides energy as a service to customers with no access to grid power o... - United States Flag United States New York United States (HQ) + 1 2015 Energy, Renewable Energy +1 [email protected]
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653 (86%) 4 years ago Series A 1 8.0M 2360 7 months ago
Team Solar - We use solar to help you see returns from unused land, roof, and parking lot spa... Team Solar is made up of industry experts, solar enthusiasts, and even past cust... - United States Flag United States Framingham United States (HQ) 2016 Energy, Finance +3 [email protected]
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202 (73%) 3 years ago Grant 2 120.0K 135 7 jW9 pim
Transaera, Inc. - Cooling for All - bringing comfort to billions of people while reducing the impa... Residential air conditioning is becoming a necessity rather than a luxury. Three... - United States Flag United States Somerville United States (HQ) 2018 Entertainment, Energy Efficiency [email protected]
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1.7K (-32%) 2 years ago Series Unknown 10 9.7M 3038 9 months ago
Aypa Power - A Blackstone Portfolio Company Leading the evolution of energy infrastructure, Aypa Power has redefined utility... - United States Flag United States Austin United States (HQ) + 1 2017 Energy, Energy Efficiency -
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2.9K (142%) 10 months ago Debt Financing 4 1.5B 9937 5 months ago
FarmVisionAI, by Illumite... - The Digital Horticulture Company FarmVisionAI™ began as a product of the LED lighting company, Illumitex. In Febr... - United States Flag United States Austin United States (HQ) 2005 Agriculture, Hardware +3 [email protected]
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362 8 years ago Series Unknown 12 83.8M 3987 4 years ago
Rondo Energy - Zero-Carbon Industrial Heat: The Rondo Heat Battery We're hiring!! Rondo is delivering the world's lowest cost zero-carbon industria... - United States Flag United States Oakland United States (HQ) 2020 Energy, Renewable Energy +1 -
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66 11 months ago Debt Financing 4 162.3M 17419 5 months ago
Perch Energy - We help residents and businesses save money from state community solar programs—... Perch Energy is a leading community solar servicer on a mission to make renewabl... - United States Flag United States Boston United States (HQ) 2021 Energy, Renewable Energy +2 [email protected]
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98.9K (-11%) 1 year ago Series B 3 43.8M 2927 5 months ago
Sealed - On a mission to stop home energy waste and electrify every home. Sealed is a climate tech company on a mission to stop home energy waste by enabl... - United States Flag United States New York United States (HQ) 2012 Lending and Investments, Sustainability +2 [email protected]
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83.7K (-25%) 1 year ago Series B 6 97.5M 6971 6 months ago
Esperanto Technologies, I... - The Most Energy-Efficient Computing Solutions for Artificial Intelligence and Be... Esperanto Technologies develops high-performance, energy-efficient computing sol... - United States Flag United States Mountain View United States (HQ) 2014 AI, IT +3 [email protected]
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8.4K (300%) 4 years ago Convertible Note 3 124.0M 4933 5 months ago
Altus Thermal - Rethinking energy use in the home. Altus is rethinking energy use in the home. Based @ Greentown Labs HQ. - United States Flag United States Boston United States (HQ) 2020 Energy, Renewable Energy +1 [email protected]
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865 (-100%) 1 year ago Seed 6 7.7M 1152 10 M3e 9JO
Invenergy - Innovators building a sustainable world. Invenergy is accelerating cleaner, more reliable, affordable energy. Invenergy a... - United States Flag United States Chicago United States (HQ) 2001 Energy, Renewable Energy +2 -
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43.1K (20%) 1 year ago Debt Financing 11 8.2B 110603 5 months ago
Geminus - AI for the real-time optimization of equipment and systems. AI for the energy t... Geminus is an industrial AI optimization platform challenging the AI status quo.... - United States Flag United States Cambridge United States (HQ) + 1 2018 AI, Renewable Energy +6 [email protected]
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1.6K (-43%) 1 year ago Series A 4 22.9M 2155 5 months ago
Optimum Energy - The global leader in HVAC optimization with customer savings of 2.5 Billion kWh,... Since 2005, Optimum Energy’s patented software and engineering expertise has hel... - United States Flag United States Seattle United States (HQ) 2005 Energy, Enterprise Software +1 [email protected]
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599 (-100%) 8 years ago Series Unknown 12 40.9M 5104 5 months ago
LifeLabs Design, Inc. - We believe in a better life through science & design. We believe in a new era of sustainability focused on lower personal energy usage... - United States Flag United States Sunnyvale United States (HQ) 2020 Energy, Energy Efficiency [email protected]
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765 3 years ago Seed 2 13.0M 1913 2 OQg MW4
Almika - Shaping the energy future for all. Almika is set on disrupting how electricity is produced and consumed in today’s... - United States Flag United States Houston United States (HQ) 2019 Energy, Renewable Energy +1 [email protected]
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1.9K (705%) 3 years ago Seed 1 1.0M 173 8 GUE GmA
Cirrascale Cloud Services - Cirrascale provides bare-metal AI accelerators systems specifically designed to... Cirrascale Cloud Services is a premier provider of public and private dedicated,... - United States Flag United States San Diego United States (HQ) 2010 Computing, Data Analytics +2 [email protected]
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680 (-100%) 10 years ago Series Unknown 7 59.0M 1614 5 months ago
75F - The future of control, today. At 75F, we design and build smart sensors and controls to make commercial buildi... - United States Flag United States Minneapolis United States (HQ) 2012 AI, Energy +3 [email protected]
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46.4K (36%) 3 years ago Series A 6 29.9M 9056 5 months ago
Orange - Orange brings home electric vehicle charging to people no matter where they live... Drivers are going electric, fast. 30 million electric vehicles are expected on t... - United States Flag United States Menlo Park United States (HQ) 2020 Energy, Energy Efficiency +1 [email protected]
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4.3K (-17%) 1 year ago Seed 2 9.0M 6574 9 months ago
Nightpeak Energy - Reliably powering communities towards a low-carbon future Nightpeak Energy develops, owns and operates energy projects that meet the growi... - United States Flag United States Oakland United States (HQ) + 1 2022 Energy, Manufacturing +4 [email protected]
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1.3K (31%) 2 years ago Private Equity 2 200.0M 1790 7 months ago
Recurve - Platform for Energy Demand Flexibility We connect the dots between efficiency, electrification, renewable energy, and D... - United States Flag United States Mill Valley United States (HQ) 2015 Analytics, Energy +2 [email protected]
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8.3K (38%) 2 years ago Series B 4 32.0M 8472 6 months ago
Encentiv Energy - Making energy efficiency accessible and affordable so more people take action to... Encentiv Energy simplifies the energy efficiency marketplace.
By making energy e...
- United States Flag United States Pittsburgh United States (HQ) 2009 Energy, Clean Energy +1 [email protected]
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1.3K (39%) 4 years ago Series Unknown 7 3.2M 1589 5 months ago
BrightNight - Power when you need it. BrightNight is a leading renewable integrated power company designed to provide... - United States Flag United States West Palm Beach United States (HQ) 2018 Energy, Renewable Energy +1 [email protected]
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15.0K (329%) 10 months ago Private Equity 4 1.3B 17473 6 months ago
D2Solar - Reduce risks. Solve challenges. Minimize costs. Founded in the Bay Area, D2Solar is an independent product development engineeri... - United States Flag United States San Jose United States (HQ) 2010 Energy, Manufacturing +2 [email protected]
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1.6K 14 years ago Seed 1 350.0K 342 1 year ago
Energy Source - Your leading provider of comprehensive energy efficiency and electrification sol... Energy Source is a leading provider of full turnkey, comprehensive energy effici... - United States Flag United States Smithfield United States (HQ) + 3 2003 Energy, Sustainability +1 [email protected]
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847 (-29%) 1 year ago Series Unknown 1 1.2M 2864 5 months ago
Scope Zero - We created the Carbon Savings Account™. Think health savings account, but for ho... We created the Carbon Savings Account™ (CSA) - think HSA, but for home tech and... - United States Flag United States San Francisco United States (HQ) 2022 Energy, Renewable Energy +3 [email protected]
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1.4K (-22%) 1 year ago Seed 3 200.0K 1894 5 months ago
Tank Utility - Acquired b... - IoT and Software Analytics to help Delivered Fuels Save Time, Money and Energy. Tank Utility is a leading provider of remote monitoring services for truck-deliv... - United States Flag United States Boston United States (HQ) 2014 Energy, IoT +3 -
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12.5K (29%) 6 years ago Series Unknown 6 8.2M 1016 4 years ago
Voltus - Better Energy, More Cash. Voltus is a leading DER technology platform and virtual power plant operator con... - United States Flag United States San Francisco United States (HQ) 2016 Energy, Energy Efficiency +1 [email protected]
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31.9K (-31%) 4 years ago Series C 3 66.1M 14407 5 months ago
Via Separations - Do more with less At Via Separations, we take a materials approach to the world's wasted energy. W... - United States Flag United States Watertown United States (HQ) 2017 Manufacturing, Energy Efficiency [email protected]
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1.1K 6 years ago Grant 1 57.4M 4197 5 months ago