Sector portfolio · Government fund · United States
US Department of Energy's Cleantech portfolio
US Department of Energy has backed 43 Cleantech startups in rounds we track, $3.0B between them, shown by the stage each has reached. The best-funded is The Appalachian Regional Clean Hydrogen Hub.
US Department of Energy's whole portfolioUS Department of Energy's profile
The Appalachian Regional Clean Hydrogen Hub
1PointFive
ICE Thermal Harvesting
Skyven Technologies
Type One Energy
Terrestrial Energy
LanzaJet
AirCapture
OxEon Energy
Pacific Northwest Hydrogen Association
Barrio Eléctrico
Sunwealth Power
Daphne Technology
Alpen High Performance Products
Amermin
Encino Environmental Services
Relevate Power
Littoral Power Systems
Triton Anchor
Transitional Energy- AFAlder Fuels
Blue Biofuels
Resilient Power Systems
Stepwise
+8 more
Funding by segment
- Stage not reported$2.2B32
- Series A$369M5
- Pre-seed and seed$46M4
- Series B$351M2
Where they are based
- United States37$2.6B
- Canada1$76M
- Puerto Rico1$21M
- Switzerland1$19M
- Norway1$1.4M
- Germany1$280M
United States
Canada
Puerto Rico
Switzerland
Norway
GermanyFounded
6 without a founding year on record.
Total raised
- Under $1M8
- $1M to $10M10
- $10M to $50M14
- $50M to $250M8
- $250M to $1B3
- $1B and over0
Each dot is a startup: the year it was founded across, the total it has raised up (each line is ten times the one below). Pick a segment to pick it out.
36 of 43 startups shown; the rest have no founding year or amount on record.
- 1 to 2
- 3 to 7
- 8 to 24
- 25 to 99
- 100 and more
- United States37
- Canada1
- Puerto Rico1
- Switzerland1
- Norway1
- Germany1
Startups by country, 6 countries in all.
Segment by segment
Stage not reported
32 startups · $2.2B raised
- The Appalachian Regional Clean Hydrogen HubARCH2's mission is to provide an interconnected, full value chain H2Hub solution.United States$925M
- 1PointFive1PointFive is a multi-solution platform for Carbon Capture, Utilization and Sequestration (CCUS) that provides decarbonization solutions.United States$500M
- ICE Thermal HarvestingICE Thermal Harvesting focuses on supplying zero-emission power in various regions around the world.United States$150M
- Skyven TechnologiesSkyven Technologies is an energy-as-a-service company with a mission to decarbonize industrial process heat.United States$145M
- Type One EnergyStellarator technology to transform energy markets with fusion power.United States$88M
- Terrestrial EnergyTerrestrial Energy is a developer of a reactor power plant technology to provide carbon-free energy for the global industry.Canada$76M
- LanzaJetLanzaJet is a private company founded in 2020 that focuses on sustainable fuels technology.United States$67M
- AirCaptureAircapture is a climate technology company based in Berkeley, California, founded in 2019.United States$50M
Series A
5 startups · $369M raised
Focused EnergyFocused Energy is a German-American deep-tech startup founded in 2021, specializing in laser-driven inertial confinement fusion (ICF).Germany$280M
Capture6Capture6 is a climate technology company based in Berkeley, California, and Rotorua, New Zealand.United States$28M
HyliionCreating innovative generator solutions that enable clean, flexible, and affordable electricity production.United States$27M
Power to HydrogenPower to Hydrogen develops advanced AEM electrolyzers that integrate with renewables while eliminating precious, expensive metals.United States$18M
Zero HomesZero Homes is a technology company based in Denver, founded in 2021-2022.United States$17M
Pre-seed and seed
4 startups · $46M raised
GradientUnited States$24M
Helix EarthHelix Earth Technologies, Inc.United States$12M
NOMAD Transportable Power SystemsNOMAD Transportable Power Systems offers patent-pending technologies to fit any project or application need.United States$7.4M
EELI TechnologyEELI Technology, a Silicon Valley-based mining technology company, develops Advanced Lithium Recovery solutions, making lithium prUnited States$2.0M
Series B
2 startups · $351M raised
Quaise EnergyQuaise Energy is a technology company founded in 2018, originating from the MIT Plasma Science and Fusion Center.United States$180M
Mazama EnergyMazama Energy is a geothermal developer founded in March 2023 and based in Frisco, Texas, with a corporate office in Plano.United States$171M
How this map is made. Every startup here works in Cleantech and has raised money in a round we track that names US Department of Energy as an investor. Each sits under the stage of its latest round. Rebuilt nightly; updated 15 November 2026.
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