Energy startups VCs just backed
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YC F26 · ryhla.ai
Ryhla — Speeds up power grid connection for projects
Faster power grid connection for your projects
Solar powerClimateEnergyYCRenewable energyInfrastructure · +1 · +4
$750M · elementlpower.io
Elementl Power — Develops advanced nuclear power projects
Elementl Power has secured a partnership to fund up to $750 million for the development of three advanced nuclear projects, led by DS Investment Partners and Samsung C&T.
EnergySamsung C&TDS Investment Partners$100M+ · +1
$108M Series B · peakenergy.com
Peak Energy — Maintenance-free sodium-ion grid batteries for utilities
Peak Energy builds grid-scale sodium-ion battery storage designed to run its 20-year life without scheduled maintenance, for utilities, power producers and AI data centers. The new money funds US manufacturing.
EnergyRenewable energySolarMaverick SiliconInfinite CapitalEclipse · +4 · +7
$8.8M · circularityfuels.com
Circularity Fuels — Reactors that turn waste carbon into drop-in fuels
Circularity Fuels builds AI-controlled, mass-manufacturable reactors that turn waste carbon and cheap renewable power into drop-in hydrocarbon fuels and chemicals. Its October 2026 SEC Form D reports $8.79M raised toward a $10.2M offering.
Energy$1M+
$8M Pre-Seed · americansupercritical.com
American Supercritical — Supercritical CO2 tech for power generation
American Supercritical is focused on advancing technology to commercialize supercritical CO2. The company aims to innovate the energy sector by improving efficiency in power generation. Their goal is to make the traditional simple cycle gas turbine obsolete. Through their technology, they seek to provide cleaner and more effective energy solutions.
EnergyOil and gasRenewable energy$1M+ · +1
$135M Series B · mazamaenergy.com
Mazama Energy — Carbon-free geothermal power from superhot rock
Mazama Energy is a geothermal operator and development company dedicated to advancing technologies and methods for extracting heat from superhot rocks to generate utility-scale, carbon-free, baseload energy. The company’s capabilities are derived from its founders AltaRock Energy and Blade Energy Partners.
EnergyOil and gasRenewable energyKhosla Ventures$100M+Biomass energy · +3
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$46.3M · whisper.aero
Whisper Aero — Quieter, more efficient thrust for drones and jets
Delivering the next generation of cleaner, quieter, more efficient thrust for drones, jets, and more
Energy$10M+
$1B · basepowercompany.com
Base Power — Power company running a network of distributed batteries
Base is building the future of American power. The grid is the largest, most complex machine in the world. But it’s aging, struggling to keep up with today’s demand, and is unprepared for our electrified future. Base is modernizing the grid as the first engineering-led, technology-driven power company. We’re deploying a nationwide network of distributed batteries that strengthens critical infrastructure and saves Americans money. Our team of engineers, operators, creatives, technicians, and electricians design and deploy systems at speed. If you want to tackle the problem that will define this century and shape the future of American energy, now is the time.
EnergyRenewable energy$100M+
YC F26 · superradiant.co
SuperRadiant — Robots that form hypotheses and run scientific experiments
SuperRadiant builds Embodied Scientific Intelligence: general-purpose robotic experimentalists that observe, form hypotheses and run experiments in the physical world. The system automates the full experimental loop while staying flexible enough for real discovery work, adapting to changing protocols and new instruments. Founded in 2026 in San Francisco by Cooper Niu, Benedict Quartey and Owen Tower, with a team drawn from Brown, NASA JPL, Fermilab and CERN. Y Combinator Fall 2026.
RoboticsEnergyAdvanced materialsYCArtificial intelligenceBiotechnology · +1 · +4
$74M · odysseyenergysolutions.com
Odyssey Energy Solutions — Connects solar companies with financiers to fund projects
Odyssey’s mission is to radically accelerate capital deployment into distributed energy to get more projects built, faster. Odyssey brings together solar companies and financiers through a technology platform to streamline solar financing through every phase of the process, from origination and due diligence to credit underwriting, procurement, portfolio tracking, and asset management, reporting & compliance.
EnergyTriple JumpCygnum CapitalBiotechnologyBritish International InvestmentTransition Ventures · +10 · +13
YC F26 · talos-us.com
Talos — Predictive maintenance for power infrastructure
Talos builds predictive maintenance for power infrastructure. It continuously monitors critical power equipment, detects meaningful changes in behaviour, and tells teams where to look before a failure becomes an outage. Founded in 2026 by Kevin Hwang, Amitav Kohli and Himani Musku, the Baltimore-based company is in Y Combinator's Fall 2026 batch.
Deep learningIoTEnergyYCIndustrials · +2
$35M Series A · voya.energy
Voya Energy — Aluminum fuel that makes electricity without combustion
Voya Energy is focused on innovative energy solutions, unveiling a proprietary aluminum-based metal fuel system paired with an electrochemical generator. This technology aims to produce electricity without combustion or air emissions, advancing sustainable energy methods. The company is committed to commercial deployment of its groundbreaking systems.
ManufacturingEnergyRenewable energySeven StarsOvermatchFounders Fund · +5 · +8
YC S26 · ethos-space.com
Ethos Space Resources — Makes solar-grade silicon from lunar regolith
Ethos Space Resources makes solar-grade silicon on the Moon. Demand for AI compute is compounding toward a terawatt a year of new capacity, and once data centres head to orbit it is rocket capacity, not the grid, that caps the buildout — so terawatt-scale AI in space has to be built from mass already outside Earth's gravity well. Ethos melts, electrolyses and purifies lunar regolith in hard vacuum, a single process that yields construction materials, rocket propellant and solar-grade silicon, tested in the company's own lunar environment chamber. The work starts with mining and construction for the first heavy landings: landing pads, propellant for the trip home, and silicon that turns sunlight into more capacity. Founded in 2022 by Ross Centers (Planetary Sunshade Institute) and Brogan BamBrogan (former principal propulsion engineer at SpaceX, co-founder of Hyperloop One), Ethos is based in Los Angeles and is part of Y Combinator's Summer 2026 batch.
Hard techExascale computing3d-printingYCEnergyAerospace · +1 · +4
$31M Seed · apolloatomics.com
Apollo Atomics — Factory-built pressurized water nuclear reactors
Apollo Atomics is an MIT spinoff focused on developing the next generation of pressurized water reactors (PWRs) designed for factory-based manufacturing. The company aims to deliver high power density nuclear reactors capable of providing carbon-free energy for various large-scale energy users. Their innovative approach seeks to reduce the overall reactor footprint and accelerate regulatory processes for commercialization. Apollo has established a commercial pipeline with over 20 gigawatts of signed letters of intent.
ManufacturingEnergyRenewable energyRay RothrockMatteo FranceschettiPhilip Johnston · +11 · +14
YC F26 · kanopy-ai.com
Kanopy — Computer vision operating layer for physical infrastructure
Computer vision operating layer for physical infrastructure
EnergyIndustrialIndustrialsYC · +1
$35M Series D · connectder.com
ConnectDER — Meter adapters that connect home solar, EVs and batteries
ConnectDER (www.ConnectDER.com) represents the next generation in US-based resource technology product development. Our signature product, the ConnectDER Meter Socket Adapter, dramatically cuts down the cost and interconnection time for solar energy, EV charging, and home battery storage, putting clean, resilient power within reach of millions of homeowners. With a pipeline of exciting innovations, we’re only just getting started on our journey to transform how the world makes and consumes its energy.
ManufacturingEnergy$10M+
$695M · recurrentenergy.com
Recurrent Energy — Develops utility-scale solar and battery storage plants
This structure provides Recurrent Energy significant flexibility to execute on its growth plans and accelerate its transition to a develop-to-own model in its core markets in North America and Europe, capturing the full value of the projects developed in low-risk markets. As of the first quarter of 2023, Recurrent Energy has a total global solar PV project pipeline of 25 GWp and 47 GWh of battery storage of which 14 GWp and 12 GWh respectively have interconnections granted, with a large majority of the pipeline being developed from greenfield. Recurrent Energy is one of the world's largest and most geographically diversified utility-scale solar and battery energy storage platforms, with a track record of 9 GW of solar and 3 GWh of battery storage power plants now in operation in 29 countries across five continents.
EnergyRenewable energySolarWells FargoNord/LbMitsubishi Ufj Financial Group, Inc. · +1 · +4
$150M · nironmagnetics.com
Niron Magnetics — Rare-earth-free permanent magnets made from iron nitride
Niron Magnetics is developing the world’s first advanced manufacturing process for the mass production of permanent magnets powered by its breakthrough material formulation. Niron’s proprietary Clean Earth Magnet™ technology based on Iron nitride enables magnets that possess inherently higher magnetization and can be produced at a lower cost compared to today’s rare-earth magnets and will enable a revolution in the design of new electric motors and generators. Niron participates in a U.S. Department of Energy funded project that aims to develop more cost effective and sustainable drivetrains for electric vehicles.
ManufacturingEnergy$100M+
$6M Seed · zanskar.com
Zanskar — Affordable 24/7 carbon-free geothermal power
Zanskar's mission is to make geothermal power the most affordable form of widely-deployable, 24/7, carbon-free energy generation on the planet.
EnergyOil and gasArtificial intelligenceBessemer Venture Partners$1M+Biomass energy · +3
$267M · sunrun.com
Sunrun Inc. — Residential solar power for homeowners
Sunrun is a United States-based provider of residential solar electricity and solar power services for homeowners.
EnergyRbc Capital MarketsMorgan StanleyCitigroupBof A Securities$100M+ · +3
$1B Series D · basepowercompany.com
Base Power — Subscription home batteries for outage backup and the grid
Base Power raised $1B in Series D funding at a $13B valuation, bringing total funding to over $2.5B. The Austin-based company installs home battery systems in customers' backyards on a subscription model — it retains ownership of the batteries, charges an install fee plus a monthly rate, gives homeowners outage backup, and sells stored electricity back to the grid at peak demand. It operates in Texas and Illinois, installs roughly 100 batteries a day, and has utility partnerships totalling over 200 MW. Alongside the round it launched Base Core, a 39.2 kWh home battery built in the United States.
EnergyEnergy StorageBatteryRibbitAdditionValor Equity Partners · +15 · +18
$550M Series C · antora.com
Antora Energy — Thermal batteries that supply heat and power to industry
Antora is transforming industrial energy with its factory-built thermal batteries that store and deliver reliable, low-cost, and zero-carbon heat and power for industrial operations of any scale. Based in the United States, Antora is driven by a mission to decarbonize industry and build a future where every facility worldwide runs on abundant, clean energy—powered by a diverse and passionate team that values collaboration, innovation, and purpose.
EnergySustainabilityNatural resourcesDecarbonization PartnersLiberty Mutual Strategic VenturesStep Stone Group · +9 · +12
$43M Series A · lydianlabs.com
Lydian — Fuels, plastics and chemicals made from CO2 and water
Founded in 2021, Lydian is addressing more than 10% of global greenhouse gas emissions by creating the fuels, plastics, and other chemicals we need out of carbon dioxide and water, not petroleum. For more information, visit www.lydianlabsinc.com.
EnergyOil and gasRenewable energyVoyager VenturesUnion Square VenturesOverture · +7 · +10
$1B · valaratomics.com
Valar Atomics — Synthetic fuels made from CO2 and water with nuclear power
Valar Atomics is an energy startup based in El Segundo, Calif. which aims to produce low-cost, carbon neutral synthetic fuels by leveraging atomic energy. Valar’s proprietary technology will generate synthetic fuels such as aviation fuel, diesel, and natural gas from atmospheric carbon dioxide and water, using mass-manufactured nuclear reactors as the energy source for the reactions. The company aims to sell its synthetic fuels as drop-in replacements for naturally extracted petroleum at a lower price than conventional products from the oil and gas industry.
ManufacturingEnergyOil and gasSequoia$100M+Renewable energy · +3
