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
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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
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Dover | United States (HQ) + 1 | 2020 | Blockchain, Energy +1 | [email protected] |
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4
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54 (-100%) | 1 year ago | Pre Seed | 5 | 369.5K | 1131 | 5 months ago | |
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FlexEnergy Solutions | - | Clean, efficient, rugged and ultra-reliable small gas turbines. | FlexEnergy Solutions is a technology company that designs, manufactures, leases... | - |
United States
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Greenwood Village | United States (HQ) | 2000 | Energy, Manufacturing +2 | [email protected] |
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71
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1.7K (-11%) | 10 years ago | Private Equity | 4 | 25.3M | 2783 | 5 months ago | |
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Xtreme Power Conversion C... | - | Protect your Business. | Xtreme Power, a global provider of power quality solutions, is dedicated to prov... | - |
United States
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Denver | United States (HQ) | 1992 | Energy, Energy Efficiency +1 | - |
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32
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5.6K (33%) | 11 years ago | Debt Financing | 8 | 71.8M | 1940 | 7 months ago | |
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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
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Dunedin | United States (HQ) | 2022 | Energy, Renewable Energy +3 | [email protected] |
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Low
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9
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754 | 2 years ago | Convertible Note | 1 | 7.5M | 206 | 2 AZK zJT | |
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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
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Los Angeles | United States (HQ) | 2016 | Energy, Manufacturing +4 | [email protected] |
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Low
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5
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564 (-100%) | 3 years ago | Grant | 7 | 7.7M | 215 | 9 dDS RyI | |
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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... |
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United States
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Boulder | United States (HQ) | 2017 | Consumer Electronics, Energy Efficiency +1 | [email protected] |
1
Low
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9
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96 | 4 years ago | Seed | 7 | 2.5M | 748 | 1 year ago | |
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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
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Washington | United States (HQ) + 1 | 2013 | Energy, Energy Efficiency | - |
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39
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1.2K (-40%) | 1 year ago | Corporate Round | 8 | 41.2M | 8007 | 1 year ago | |
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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
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Somerville | United States (HQ) + 2 | 2016 | Payments, Renewable Energy +3 | [email protected] |
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11
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1.7K (55%) | 4 years ago | Non Equity Assistance | 7 | 2.6M | 3058 | 7 months ago | |
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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
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South San Francisco | United States (HQ) + 1 | 2013 | Energy, IoT +1 | [email protected] |
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20
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86 | 6 years ago | Convertible Note | 8 | 4.0M | 1229 | 2 years ago | |
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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
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Boulder | United States (HQ) | 2016 | Energy, Renewable Energy +1 | [email protected] |
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Low
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16
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1.3K (8%) | 2 years ago | Series Unknown | 6 | 10.5M | 1422 | 9 months ago | |
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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
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Whitewater | United States (HQ) | 2015 | Manufacturing, Energy Efficiency +1 | [email protected] |
1
Low
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13
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1.5K (-17%) | 3 years ago | Seed | 5 | 5.1M | 1326 | 5 months ago | |
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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
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Atlanta | United States (HQ) | 2007 | Food and Beverage, Energy Efficiency | [email protected] |
1
Low
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51
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30.9K (-21%) | 7 years ago | Series Unknown | 5 | 26.0M | 6310 | 6 months ago | |
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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
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New York | United States (HQ) + 1 | 2015 | Energy, Renewable Energy +1 | [email protected] |
1
Low
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21
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653 (86%) | 4 years ago | Series A | 1 | 8.0M | 2360 | 7 months ago | |
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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
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Framingham | United States (HQ) | 2016 | Energy, Finance +3 | [email protected] |
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Low
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3
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202 (73%) | 3 years ago | Grant | 2 | 120.0K | 135 | 8 SOk naN | |
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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
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Somerville | United States (HQ) | 2018 | Entertainment, Energy Efficiency | [email protected] |
1
Low
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13
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1.7K (-32%) | 2 years ago | Series Unknown | 10 | 9.7M | 3038 | 9 months ago | |
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Aypa Power | - | A Blackstone Portfolio Company | Leading the evolution of energy infrastructure, Aypa Power has redefined utility... | - |
United States
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Austin | United States (HQ) + 1 | 2017 | Energy, Energy Efficiency | - |
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Low
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160
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2.9K (142%) | 10 months ago | Debt Financing | 4 | 1.5B | 9937 | 5 months ago | |
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FarmVisionAI, by Illumite... | - | The Digital Horticulture Company | FarmVisionAI™ began as a product of the LED lighting company, Illumitex. In Febr... | - |
United States
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Austin | United States (HQ) | 2005 | Agriculture, Hardware +3 | [email protected] |
1
Low
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23
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190 | 8 years ago | Series Unknown | 12 | 83.8M | 3987 | 4 years ago | |
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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
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Oakland | United States (HQ) | 2020 | Energy, Renewable Energy +1 | - |
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136
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874 | 11 months ago | Debt Financing | 4 | 162.3M | 17419 | 5 months ago | |
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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
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Boston | United States (HQ) | 2021 | Energy, Renewable Energy +2 | [email protected] |
1
Low
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57
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98.9K (-11%) | 1 year ago | Series B | 3 | 43.8M | 2927 | 5 months ago | |
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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
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New York | United States (HQ) | 2012 | Lending and Investments, Sustainability +2 | [email protected] |
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Low
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53
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83.7K (-25%) | 1 year ago | Series B | 6 | 97.5M | 6971 | 6 months ago | |
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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
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Mountain View | United States (HQ) | 2014 | AI, IT +3 | [email protected] |
1
Low
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114
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8.4K (300%) | 4 years ago | Convertible Note | 3 | 124.0M | 4933 | 5 months ago | |
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Altus Thermal | - | Rethinking energy use in the home. | Altus is rethinking energy use in the home. Based @ Greentown Labs HQ. | - |
United States
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Boston | United States (HQ) | 2020 | Energy, Renewable Energy +1 | [email protected] |
1
Low
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14
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389 (-100%) | 1 year ago | Seed | 6 | 7.7M | 1152 | 5 A8H h4t | |
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Invenergy | - | Innovators building a sustainable world. | Invenergy is accelerating cleaner, more reliable, affordable energy. Invenergy a... | - |
United States
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Chicago | United States (HQ) | 2001 | Energy, Renewable Energy +2 | - |
1
Low
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2282
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43.1K (20%) | 1 year ago | Debt Financing | 11 | 8.2B | 110603 | 5 months ago | |
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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
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Cambridge | United States (HQ) + 1 | 2018 | AI, Renewable Energy +6 | [email protected] |
1
Low
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33
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1.6K (-43%) | 1 year ago | Series A | 4 | 22.9M | 2155 | 5 months ago | |
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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
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Seattle | United States (HQ) | 2005 | Energy, Enterprise Software +1 | [email protected] |
1
Low
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105
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882 (-100%) | 8 years ago | Series Unknown | 12 | 40.9M | 5104 | 5 months ago | |
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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
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Sunnyvale | United States (HQ) | 2020 | Energy, Energy Efficiency | [email protected] |
1
Low
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3
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996 | 3 years ago | Seed | 2 | 13.0M | 1913 | 2 oed 6ze | |
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Almika | - | Shaping the energy future for all. | Almika is set on disrupting how electricity is produced and consumed in today’s... | - |
United States
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Houston | United States (HQ) | 2019 | Energy, Renewable Energy +1 | [email protected] |
1
Low
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11
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1.9K (705%) | 3 years ago | Seed | 1 | 1.0M | 173 | 2 iWL cTu | |
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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
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San Diego | United States (HQ) | 2010 | Computing, Data Analytics +2 | [email protected] |
1
Low
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41
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42 (-100%) | 10 years ago | Series Unknown | 7 | 59.0M | 1614 | 5 months ago | |
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75F | - | The future of control, today. | At 75F, we design and build smart sensors and controls to make commercial buildi... | - |
United States
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Minneapolis | United States (HQ) | 2012 | AI, Energy +3 | [email protected] |
1
Low
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110
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46.4K (36%) | 3 years ago | Series A | 6 | 29.9M | 9056 | 5 months ago | |
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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
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Menlo Park | United States (HQ) | 2020 | Energy, Energy Efficiency +1 | [email protected] |
1
Low
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48
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4.3K (-17%) | 1 year ago | Seed | 2 | 9.0M | 6574 | 9 months ago | |
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Nightpeak Energy | - | Reliably powering communities towards a low-carbon future | Nightpeak Energy develops, owns and operates energy projects that meet the growi... | - |
United States
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Oakland | United States (HQ) + 1 | 2022 | Energy, Manufacturing +4 | [email protected] |
1
Low
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16
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1.3K (31%) | 2 years ago | Private Equity | 2 | 200.0M | 1790 | 7 months ago | |
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Recurve | - | Platform for Energy Demand Flexibility | We connect the dots between efficiency, electrification, renewable energy, and D... | - |
United States
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Mill Valley | United States (HQ) | 2015 | Analytics, Energy +2 | [email protected] |
1
Low
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62
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8.3K (38%) | 2 years ago | Series B | 4 | 32.0M | 8472 | 6 months ago | |
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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... |
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United States
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Pittsburgh | United States (HQ) | 2009 | Energy, Clean Energy +1 | [email protected] |
1
Low
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21
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1.3K (39%) | 4 years ago | Series Unknown | 7 | 3.2M | 1589 | 5 months ago | |
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BrightNight | - | Power when you need it. | BrightNight is a leading renewable integrated power company designed to provide... | - |
United States
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West Palm Beach | United States (HQ) | 2018 | Energy, Renewable Energy +1 | [email protected] |
1
Low
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194
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15.0K (329%) | 10 months ago | Private Equity | 4 | 1.3B | 17473 | 6 months ago | |
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D2Solar | - | Reduce risks. Solve challenges. Minimize costs. | Founded in the Bay Area, D2Solar is an independent product development engineeri... | - |
United States
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San Jose | United States (HQ) | 2010 | Energy, Manufacturing +2 | [email protected] |
1
Low
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8
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1.6K | 14 years ago | Seed | 1 | 350.0K | 342 | 1 year ago | |
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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
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Smithfield | United States (HQ) + 3 | 2003 | Energy, Sustainability +1 | [email protected] |
1
Low
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47
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847 (-29%) | 1 year ago | Series Unknown | 1 | 1.2M | 2864 | 5 months ago | |
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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
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San Francisco | United States (HQ) | 2022 | Energy, Renewable Energy +3 | [email protected] |
1
Low
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7
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1.4K (-22%) | 1 year ago | Seed | 3 | 200.0K | 1894 | 5 months ago | |
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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
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Boston | United States (HQ) | 2014 | Energy, IoT +3 | - |
1
Low
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10
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12.5K (29%) | 6 years ago | Series Unknown | 6 | 8.2M | 1016 | 4 years ago | |
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Voltus | - | Better Energy, More Cash. | Voltus is a leading DER technology platform and virtual power plant operator con... | - |
United States
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San Francisco | United States (HQ) | 2016 | Energy, Energy Efficiency +1 | [email protected] |
1
Low
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256
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31.9K (-31%) | 4 years ago | Series C | 3 | 66.1M | 14407 | 5 months ago | |
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Via Separations | - | Do more with less | At Via Separations, we take a materials approach to the world's wasted energy. W... | - |
United States
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Watertown | United States (HQ) | 2017 | Manufacturing, Energy Efficiency | [email protected] |
1
Low
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41
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1.1K | 6 years ago | Grant | 1 | 57.4M | 4197 | 5 months ago |