The demand for reliable energy storage continues to climb as the US accelerates its transition towards clean, decentralized power. Startups are responding with new chemistries, smarter software, and inventive business models that are changing how we store and manage electricity.
Battery technology no longer belongs only to research labs – it’s on construction sites, in EV fleets, next to solar farms, and even embedded in neighbourhood streetlights. These shifts open the door for companies that can scale solutions quickly while staying mindful of cost, safety, and sustainability.
Here are ten US-based startups making waves in energy storage that have caught the eye of the Storm4 team in 2025.
Who is leading the charge? Read below to find out.
The Top 10 Energy Storage Startups In The US
1) Form Energy | Somerville, Massachusetts
Founded: 2017
Founders: Mateo Jaramillo, Yet-Ming Chiang, William Woodford & Ted Wiley
Funding: $900M+ (Series E, 2025)
Employees: ~500
Form Energy builds multi-day iron-air batteries designed to store energy for 100+ hours at low cost. These systems allow renewable power to be dispatched for days during outages or weather lulls. Form is now breaking ground on its first large-scale manufacturing plants in the US.
2) EnerVenue | Fremont, California
Founded: 2020
Founder: Jorg Heinemann
Funding: $125M+ (Series B, 2024)
Employees: ~160
Originally inspired by NASA’s nickel-hydrogen space batteries, EnerVenue has adapted the chemistry for grid-scale storage. The result is a safe, durable, maintenance-light system with a lifespan measured in decades, ideal for utilities looking beyond lithium-ion.
3) Antora Energy | Sunnyvale, California
Founded: 2018
Founders: Andrew Ponec, David Bierman, Justin Briggs
Funding: $80M+ (Series B, 2023)
Employees: ~85
Antora uses thermophotovoltaic technology and carbon blocks heated to glowing temperatures to store renewable electricity as heat. This heat can later be converted back into electricity or used directly for industrial processes, offering a flexible low-carbon alternative to fossil fuels.
4) Our Next Energy (ONE) | Novi, Michigan
Founded: 2020
Founder: Mujeeb Ijaz
Funding: $300M+ (Series B, 2024)
Employees: ~350
ONE develops high-density battery packs for both EVs and stationary storage. Its Gemini dual-chemistry battery aims to double EV range without compromising safety. The company is also targeting grid storage through LFP (lithium iron phosphate) solutions.
5) Ascend Elements | Westborough, Massachusetts
Founded: 2015
Founder: Eric Gratz
Funding: $700M+ (Series D, 2025)
Employees: ~400
Ascend Elements specializes in closed-loop battery materials production. Using its “hydro-to-cathode” recycling process, it turns spent lithium-ion batteries into new cathode materials, reducing the carbon footprint of future storage systems.
6) Ambient Photonics | Scotts Valley, California
Founded: 2019
Founder: Bates Marshal
Funding: $50M+ (Series B, 2024)
Employees: ~60
Ambient develops ultra-low-light solar cells that continuously charge indoor IoT devices, remote sensors, and small-scale storage without the need for battery swaps – cutting waste and maintenance costs across industrial and consumer applications.
7) Urban Electric Power | Pearl River, New York
Founded: 2018
Founders: Sanjoy Banerjee
Funding: $30M+ (Series B, 2023)
Employees: ~90
Urban Electric Power has commercialized rechargeable zinc-manganese dioxide batteries – a safer, more abundant alternative to traditional chemistries – for both grid and backup power. Their systems are already being installed in municipal and commercial projects.
8) Noon Energy | Palo Alto, California
Founded: 2018
Founder: Chris Graves
Funding: $40M+ (Series A, 2024)
Employees: ~35
Noon Energy’s carbon-oxygen battery works more like a fuel cell than a conventional lithium-ion battery. It offers ultra-low-cost long-duration storage with potential for weeks-long energy discharge – aimed at balancing seasonal renewable supply.
9) Verde Mobility | Austin, Texas
Founded: 2021
Founders: Paresh Patel
Funding: $12M (Seed & Series A, 2024)
Employees: ~25
Verde Mobility combines EV charging hubs with integrated battery storage, allowing fast charging without high grid demand. Their modular units are being rolled out in public and fleet charging locations across the southern US.
10) PolyJoule | Billerica, Massachusetts
Founded: 2019
Founders: Eli Paster
Funding: $25M+ (Series A, 2023)
Employees: ~40
PolyJoule makes organic polymer-based batteries aimed at stationary grid storage. Their chemistry is non-flammable, low-cost, and works well in extreme climates, making it attractive for off-grid and remote installations.
Why Talent Matters for Energy Storage Growth
Each of these companies reflects a broader shift in the US energy storage sector – from short-duration lithium-ion dominance toward a mix of chemistries, lifespans, and applications. As their products move from pilot to large-scale deployment, demand for senior leaders who can steer manufacturing, partnerships, and global expansion is surging.
Storm4 works with energy storage organizations to recruit energy storage executives and senior specialists in essential departments such as hardware, data, product, sales, and operations. Whether you’re scaling a startup or making your next career move in GreenTech, our consultants can connect you to the right opportunities.
