Energy bookmarks

34 bookmarks tagged Energy — raises, dev tools, and reading, newest first.

Get it by email

One brief each weekday morning. One-click unsubscribe.

14 Oct

Cool Company Raises · $8.8M

Circularity Fuels raises a $8.8M round

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+

23 Sept

Cool Company Raises · $8.0M

American Supercritical raises a $8.0M Pre-Seed round

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.

Energy Oil-And-Gas Renewable-Energy $1M+

18 Sept

Cool Company Raises · $135.0M

Mazama Energy raises a $135.0M Series B round

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.

Energy Oil-And-Gas Renewable-Energy Khosla Ventures $100M+Biomass-Energy

17 Sept

Cool Company Raises · $46.3M

Whisper Aero raises a $46.3M round

Delivering the next generation of cleaner, quieter, more efficient thrust for drones, jets, and more

Energy $10M+

15 Sept

Cool Company Raises · $1.0B

Base Power raises a $1.0B round

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.

Energy Renewable-Energy $100M+

9 Sept

Cool Company Raises · YC F26

SuperRadiant launches at YC (Fall 2026)

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.

Robotics Energy Advanced-Materials YC AI Biotechnology+1 more

1 Sept

Cool Company Raises · $74.0M

Odyssey Energy Solutions raises a $74.0M round

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.

Energy Triple Jump Cygnum Capital Bio British International Investment Transition Ventures+10 more

26 Aug

Cool Company Raises · YC F26

Talos launches at YC (Fall 2026)

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-Learning IOT Energy YC Industrials

Cool Company Raises · $35.0M

Voya Energy raises a $35.0M Series A round

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.

Manufacturing Energy Renewable-Energy Seven Stars Overmatch Founders Fund+5 more

23 Aug

Cool Company Raises · YC S26

Ethos Space Resources launches at YC (Summer 2026)

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-Tech Exascale-Computing 3d-printing YC Energy Aerospace+1 more

20 Aug

Cool Company Raises · $31.0M

Apollo Atomics raises a $31.0M Seed round

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.

Manufacturing Energy Renewable-Energy Ray Rothrock Matteo Franceschetti Philip Johnston+11 more

15 Aug

Cool Company Raises · $35.0M

ConnectDER raises a $35.0M Series D round

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.

Manufacturing Energy $10M+

13 Aug

Cool Company Raises · $695.0M

Recurrent Energy raises a $695.0M round

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.

Energy Renewable-Energy Solar Wells Fargo Nord/Lb Mitsubishi Ufj Financial Group, Inc.+1 more

7 Aug

Cool Company Raises · $150.0M

Niron Magnetics raises a $150.0M round

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.

Manufacturing Energy $100M+

5 Aug

Cool Company Raises · $6.0M

Zanskar raises a $6.0M Seed round

Zanskar's mission is to make geothermal power the most affordable form of widely-deployable, 24/7, carbon-free energy generation on the planet.

Energy Oil-And-Gas Artificial-Intelligence Bessemer Venture Partners $1M+Biomass-Energy

4 Aug

Interesting · intellinews.com

Wind and solar overtake fossil fuels in Germany for the first time ever

More of Germany's electricity came from wind and solar power than from fossil fuels for the first time ever in 2025, according to Carbon Brief's ...

Energy Renewables

Cool Company Raises · $267.0M

Sunrun Inc. raises a $267.0M round

Sunrun is a United States-based provider of residential solar electricity and solar power services for homeowners.

Energy Rbc Capital Markets Morgan Stanley Citigroup Bof A Securities $100M+

3 Aug

Cool Company Raises · $1.0B

Base Power raises a $1.0B Series D round

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.

Energy Energy Storage Battery Ribbit Addition Valor Equity Partners+15 more

31 Jul

Interesting · construction-physics.com

Why Is Everyone Trying to Build a Solid-State Battery?

A battery technology that’s getting a lot of attention is solid-state batteries, lithium-ion batteries that replace the liquid electrolyte with a solid material.

Energy Solid State

30 Jul

Cool Company Raises · $550.0M

Antora Energy raises a $550.0M Series C round

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.

Energy Sustainability Natural-Resources Decarbonization Partners Liberty Mutual Strategic Ventures Step Stone Group+9 more

Cool Company Raises · $43.0M

Lydian raises a $43.0M Series A round

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.

Energy Oil-And-Gas Renewable-Energy Voyager Ventures Union Square Ventures Overture+7 more

17 Jul

Cool Company Raises · $1.0B

Valar Atomics raises a $1.0B round

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.

Manufacturing Energy Oil-And-Gas Sequoia $100M+Renewable-Energy

8 Jul

Cool Company Raises · YC S26

Torus launches at YC (Summer 2026)

Legora for physical engineering firms

Artificial-Intelligence Construction Energy Y Combinator Enterprise-Software Industrial+3 more

7 Jul

Cool Company Raises · $134.0M

Quaise Energy, Inc. raises a $134.0M Series B round

Quaise develops millimeter wave drilling systems for deep geothermal heat access. Our technology is the only approach in the world with the potential to build geothermal wells at unprecedented depths and temperatures. By targeting depths up to 20 kilometers and temperatures up to 500 degrees Celsius, we will have the ability to build clean electric generation and heat distribution plants within a short distance of every major population and industrial center on the planet, at a fraction of the footprint of other renewables. And by scaling through the established supply base of the fossil fuel industry, we will be able to achieve the terawatt-level annual deployments that will be required to successfully decarbonize our global energy system.

Energy Idemitsu Jera Prelude Ventures Safar Partners $100M+

Get this by email

The same feed, once a day, in your inbox. One-click unsubscribe.

Prefer a reader? Subscribe by RSS instead, or browse the past issues.

Where to next

Curious who picks these?

Meet the people Get them by email