| # | Company | Location | Employees | Total Funding | Last Round | Last Funded |
|---|---|---|---|---|---|---|
| 1 |
Radiant
Radiant develops portable nuclear microreactors designed to generate electricity…
|
El Segundo | 101 - 250 | $518.8M | Series Unknown | 2026-02-17 |
| 2 |
Fervo Energy
Fervo Energy develops and operates clean energy technology to generate carbon-fr…
|
Houston | 101 - 250 | $1.9B | Debt Financing | 2026-03-19 |
| 3 |
Juniper Green Energy
Juniper Green Energy is a renewable energy power producer specializing in solar,…
|
Gurgaon | 501 - 1K | $1.8B | Debt Financing | 2026-01-06 |
| 4 |
General Fusion
General Fusion provides commercial fusion energy by developing a magnetized targ…
|
Richmond | 101 - 250 | $428.8M | Series Unknown | 2025-11-27 |
| 5 |
EcoFlow Tech
EcoFlow provides designs, develops and manufactures eco-friendly and affordable …
|
San Francisco | 1K - 5K | $114.4M | Product Crowdfunding | 2021-09-01 |
| 6 |
Stem
Stem brings and optimizes energy consumption to business through its distributed…
|
Millbrae | 501 - 1K | $737.6M | Post Ipo Debt | 2025-06-30 |
| 7 |
Redaptive
Redaptive is an Energy-as-a-Service provider that funds and installs energy-savi…
|
Denver | 251 - 500 | $1.9B | Debt Financing | 2025-12-17 |
| 8 |
Zero Homes
Zero Homes is a technology company that develops an end-to-end digital platform …
|
Denver | 11 - 50 | $17.1M | Series A | 2026-02-17 |
| 9 |
Voltus
Voltus provides cash-generating energy products to commercial, institutional, an…
|
San Francisco | 11 - 50 | $66.1M | Series C | 2021-05-13 |
| 10 |
Helical Fusion
Helical Fusion is a startup company that aims to commercialize fusion energy usi…
|
Tokyo | 11 - 50 | $40.6M | Series A | 2025-12-04 |
| 11 |
DG Matrix
DG Matrix develops solid-state power conversion systems for electric vehicle cha…
|
Raleigh | 251 - 500 | $80.0M | Series A | 2026-02-18 |
| 12 |
Turntide Technologies
Turntide Technologies develops an electric motor system designed to drive down e…
|
Sunnyvale | 501 - 1K | $491.5M | Series Unknown | 2022-06-15 |
| 13 |
LiquidStack
LiquidStack isa liquid cooling that provides hyperscale, edge, and computing.
|
Carrollton | 51 - 100 | $40.0M | Series B | 2024-09-19 |
| 14 |
Greentown Labs
Greentown Labs is a climate technology incubator that seeks to invest in the cle…
|
Somerville | 11 - 50 | $5.0M | Grant | 2024-12-18 |
| 15 |
Optiml
Optiml develops software that supports real estate decarbonization and energy tr…
|
Z├╝rich | 11 - 50 | $15.4M | Seed | 2026-02-17 |
| 16 |
Anaergia
Anaergia provides solutions for the generation of renewable energy and the conve…
|
Toronto | 101 - 250 | $126.8M | Post Ipo Equity | 2024-07-10 |
| 17 |
Vaulted Deep
Vaulted Deep provides proven technology solutions for permanent carbon removal t…
|
Houston | 11 - 50 | $40.3M | Series A | 2025-12-19 |
| 18 |
Octopus Energy Group
Octopus Energy is a clean energy technology company that provides green energy s…
|
London | 5K - 10K | $3.2B | Private Equity | 2025-12-29 |
| 19 |
Infineon Technologies
Infineon Technologies offers semiconductor solutions, microcontrollers, LED driv…
|
Neubiberg | c 10001 max | $5.5B | Grant | 2025-02-20 |
| 20 |
Sealed
Sealed is a residential energy efficiency startup that designs, manages, and fin…
|
New York | 51 - 100 | $97.5M | Series B | 2024-03-15 |
| 21 |
Standard Nuclear
Standard Nuclear manufactures advanced nuclear fuel for next-generation reactors…
|
Oak Ridge | 11 - 50 | $186.5M | Series A | 2025-06-11 |
| 22 |
BlocPower
BlocPower is an energy technology startup that focuses on developing healthy, gr…
|
Brooklyn | 1 - 10 | $267.2M | Grant | 2023-08-29 |
| 23 |
FTC Solar
FTC Solar is a fast-growing, global provider of solar tracker systems, technolog…
|
Austin | 101 - 250 | $29.3M | Post Ipo Debt | 2025-07-02 |
| 24 |
Ecomedes
Ecomedes is a SaaS platform that helps manufacturers, designers, builders, and b…
|
San Francisco | 11 - 50 | $6.0M | Non Equity Assistance | 2024-03-26 |
| 25 |
Hillcrest Energy Technologies
Hillcrest Energy Technologies specializes in developing energy solutions intende…
|
Vancouver | 11 - 50 | $15.7M | Post Ipo Debt | 2026-03-23 |
| 26 |
Husk Power Systems
Husk is the leading net-zero energy company serving rural Africa and Asia and op…
|
Fort Collins | 1K - 5K | $172.8M | Debt Financing | 2025-09-09 |
| 27 |
GE Vernova
GE Vernova provides energy consulting, gas power, and grid solutions.
|
Boston | c 10001 max | $2.6B | Post Ipo Debt | 2026-02-04 |
| 28 |
R-Zero
Smart building solutions that automates building and workforce efficiencies, to …
|
San Francisco | 51 - 100 | $170.0M | Series C | 2023-02-16 |
| 29 |
ICE Thermal Harvesting
ICE Thermal Harvesting focuses on supplying zero-emission power in various regio…
|
Houston | 1 - 10 | $151.7M | Debt Financing | 2023-08-02 |
| 30 |
Harvest Thermal
Harvest Thermal develops a control system for home use that integrates heating, …
|
Berkeley | 11 - 50 | $12.8M | Grant | 2024-09-18 |
| 31 |
Petrobras
Petrobras supplies the energy that propels development and ensures the future of…
|
Rio | c 10001 max | $11.6B | Post Ipo Debt | 2025-09-03 |
| 32 |
NXP Semiconductors
NXP Semiconductors produces secure connectivity solutions for embedded applicati…
|
Eindhoven | c 10001 max | $2.6B | Post Ipo Debt | 2025-08-12 |
| 33 |
Reframe Systems
Robotic microfactories for building net-zero homes 2x faster, 2x cheaper with 10…
|
Andover | 11 - 50 | $20.0M | Series A | 2025-08-26 |
| 34 |
SPARK Microsystems
SPARK Microsystems is the enabling wireless technology of the future.
|
Montréal | 51 - 100 | $60.9M | Series B | 2026-03-23 |
| 35 |
Cleanwatts Digital
Cleanwatts Digital is an independent technology business that specializes in AI-…
|
Coimbra | 11 - 50 | $2.9M | Private Equity | 2026-01-07 |
| 36 |
Alstom
Alstom is a global leader in the world of power generation, power transmission, …
|
Saint-ouen | c 10001 max | $17.7M | Series Unknown | 2021-12-01 |
| 37 |
Via Separations
Via Separations is a technology company that develops membrane materials for mod…
|
Watertown | 51 - 100 | $93.4M | Series Unknown | 2026-04-01 |
| 38 |
Bandora
24/7 virtual facility manager to fine tune your smart building, avoiding unexpec…
|
Porto | 11 - 50 | $2.4M | Series Unknown | 2025-06-24 |
| 39 |
Xcimer Energy
Xcimer Energy is an inertial fusion company offering laser-driven fusion to prov…
|
Denver | 101 - 250 | $117.8M | Series A | 2024-06-04 |
| 40 |
RWE
RWE is pan-European green energy company focusing on sustainability.
|
Essen | c 10001 max | $5.8B | Post Ipo Equity | 2025-09-26 |
| 41 |
Koloma
Koloma is a geologic hydrogen company that leverages technology and data to iden…
|
Denver | 11 - 50 | $477.4M | Series B | 2024-10-15 |
| 42 |
Shizen Energy
Shizen Energy is an energy firm that focusess on the development, planning, and …
|
Fukuoka | 101 - 250 | $511.0M | Private Equity | 2022-10-24 |
| 43 |
David Energy
David Energy is an energy company that leverages advanced technology to transfor…
|
Brooklyn | 11 - 50 | $64.1M | Series A | 2024-05-14 |
| 44 |
Enerin
Enerin AS focuses on energy tech, reducing costs with heating and cooling system…
|
Asker | 11 - 50 | $17.6M | Series A | 2025-11-26 |
| 45 |
Bright Night
BrightNight provides renewable power solutions for utility, commercial, and indu…
|
Rosemary Beach | 101 - 250 | $2.4B | Debt Financing | 2026-03-24 |
| 46 |
Budderfly
Budderfly is an energy management company with devices that measure and report o…
|
Shelton | 101 - 250 | $632.0M | Debt Financing | 2026-03-25 |
| 47 |
ESB
ESB is a diversified energy utility firm that provides electricity generation, t…
|
Dublin | 5K - 10K | $178.8M | Debt Financing | 2020-09-01 |
| 48 |
Tailan New Energy
Tailan New Energy is a solid-state battery company.
|
Beijing | 51 - 100 | $57.2M | Series B | 2025-12-31 |
| 49 |
Watt Fuel Cell
WATT Fuel Cell is a developer and manufacturer of solid oxide fuel cell stacks.
|
Mount Pleasant Mills | 11 - 50 | $83.0M | Corporate Round | 2022-12-07 |
| 50 |
Invenergy
Invenergy is a privately-held developer, operator, and investor in clean energy …
|
Chicago | 1K - 5K | $10.5B | Debt Financing | 2025-04-30 |