69 Best Energy Storage Startups to Watch in 2025

The Definitive Seedtable Ranking of Energy Storage Startups

We track 71,000+ companies and rank them dynamically using our Seedtable Score – a score that uses quantitative and qualitative data points to signal the momentum behind a company. We then monitor the list manually leveraging our expertise as founders and investors.

There are 208 start-ups with an aggregate funding of $17.8b. The average funding per company in this subset is $258.1m.

Last update to the database: Feb 18, 2025. See changelog.

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3

Funding Rounds

$2.9m

Money raised

Caban Systems is a Burlingame, California-based renewable energy and energy storage company developing modular energy storage platforms for critical infrastructure power needs.

Key people:

6

Funding Rounds

$98.9m

Money raised

Amprius is a Fremont, California-based nanotechnology company developing silicon nanowires for lithium-ion batteries and founded by Mark Platshon and Yi Cui.

Key people:

4

Funding Rounds

$46.9m

Money raised

LightSail Energy was a Berkeley, California based company developing above-ground compressed air energy storage (CAES) systems

Key people:

12

Funding Rounds

$6.9b

Money raised

Northvolt develops sustainable lithium-ion batteries in conjunction with R&D, industrialization, and recycling to support clean energy.

1

Funding Rounds

$23.0m

Money raised

Zeta Energy is a Houston, Texas-based company that develops lithium-sulfur batteries.

Location:

Key people:

3

Funding Rounds

$27.8m

Money raised

Coreshell Technologies is engineering liquid-deposited nanolayer coatings for Lithium Ion Batteries.

1

Funding Rounds

$34.0m

Money raised

A technology manufacturing company making Li-Metal materials, cells, and packs for drones, consumer electronics and automotive applications.

5

Funding Rounds

$18.4m

Money raised

WiBotic is a technology company specializing in wireless charging and power optimization solutions.

Key people:

5

Funding Rounds

$2.7b

Money raised

Nikola Motor Company is a Phoenix, Arizona-based automotive company founded in 2014 by Trevor Milton.

2

Funding Rounds

$20.0m

Money raised

ZEG Power is a developer of modular energy generation technology, including hydrogen fuel production with carbon capture and storage systems to produce clean hydrogen with no emissions.

8

Funding Rounds

$196.9m

Money raised

Ather Energy is a Bangalore, India-based manufacturer of intelligent electric mopeds and public charging infrastructure. Ather Energy operates as a manufacturer of electric scooters.

Key people:

11

Funding Rounds

$528.2m

Money raised

Stem is a Millbrae, California-based developer of solutions for energy consumption through a combination of data, predictive analytics, and energy storage to reduce energy costs.

4

Funding Rounds

$875.0m

Money raised

Sila Nanotechnologies is an Alameda, California-based company engineered materials company focused on improving energy storage.

6

Funding Rounds

$225.0m

Money raised

FreeWire Technologies is a San Leandro, California-based provider of battery systems for electric vehicle charging and mobile distributed power.

1

Funding Rounds

$35.0m

Money raised

Peak Power is the developer of an AI-based energy optimization software designed to serve building owners, project developers, and utilities.

8

Funding Rounds

$158.8m

Money raised

Autogrid Systems is a Redwood City, California-based developer of solutions for organization of energy data, energy analytics, and real-time predictions for actionable energy data.

6

Funding Rounds

$3.9m

Money raised

GBatteries is a sustainable energy company.

Location:

Key people:

1

Funding Rounds

$763.0k

Money raised

A nuclear reactor design company developing Waste-Annihilating Molten Salt Reactor. The company ceased operations in September 2018.

Key people:

5

Funding Rounds

$679.2m

Money raised

Form Energy develops and commercializes a low-cost battery system that can store wind and solar energy for a long duration.

Key people:

6

Funding Rounds

$61.7m

Money raised

Skeleton Technologies is a Tallinn-based energy storage company developing energy storage technology and solutions.

Location:

Key people:

4

Funding Rounds

$124.9m

Money raised

Wildcat Discovery Technologies is a San Diego-based technology company with a focus on the development of advanced materials for rechargeable and primary batteries

9

Funding Rounds

$812.4m

Money raised

BrightSource Energy is an Oakland, California-based company founded in 2006 by Arnold Goldman.

7

Funding Rounds

$73.0m

Money raised

Addionics is creating next-generation batteries through intelligent 3D battery architecture and engineering.

Location:

Key people:

1

Funding Rounds

$32.0m

Money raised

Primus Power is an Hayward, California-based zinc bromine flow battery manufacturer.

12

Funding Rounds

$30.0m

Money raised

Silatronix is a Madison, Wisconsin-based company founded in 2007 by Robert Hamers and Robert West.

Location:

Key people:

2

Funding Rounds

Involt is a company developing supercapacitor-based solutions for batteries founded in 2012.

5

Funding Rounds

$23.8m

Money raised

A company developing technology to increase the energy density of lithium-ion batteries

Key people:

9

Funding Rounds

$128.3m

Money raised

Enapter is a company that designs and manufactures hydrogen generators.

Location:

Key people:

6

Funding Rounds

$465.8m

Money raised

Highview Power is a company that provides CRYOBattery which delivers a clean and long-duration energy storage to enable a 100% renewable energy future.

6

Funding Rounds

$121.6m

Money raised

Enevate Corporation is a developer of energy storage technology for lithium-ion battery ecosystems.

1

Funding Rounds

$14.0m

Money raised

Borrego Solar Systems is a El Cajon, California-based developer and operator of commercial, residential, and public sector grid connected solar electric systems.

3

Funding Rounds

$49.0m

Money raised

H3 Dynamics is a Toulouse-based company focused on the development of hydrogen technology and telerobotics drones.

Location:

Key people:

3

Funding Rounds

$242.4m

Money raised

Phylion Battery is an industrial company that specializes in manufacturing and selling of power Lithium-ion batteries, research and development.

2

Funding Rounds

$5.8m

Money raised

Energy storage and mobile power generation solutions provider.

Location:

Key people:

6

Funding Rounds

$21.0m

Money raised

ElectrIQ Power is a San Leandro, California-based provider of battery storage solutions for homes and small businesses.

2

Funding Rounds

$11.1m

Money raised

Brill Power Limited is a company that develops intelligent battery management systems and technology to enhance the lifetime, performance and safety of lithium-ion battery packs.

Location:

Key people:

1

Funding Rounds

$1.7m

Money raised

Zēlos Energy Ltd is a San Leandro, California-based energy storage company.

Industries:

5

Funding Rounds

$57.3m

Money raised

Tigo Energy builds hardware and software intelligence into solar energy installations, making them more efficient, more manageable, and safer.

5

Funding Rounds

$53.5m

Money raised

Kraftblock provides an eco-friendly, modular thermal energy storage system.

Location:

Key people:

3

Funding Rounds

$53.5m

Money raised

Brammo was an electric motorcycle developer.

3

Funding Rounds

$40.6m

Money raised

Developer of an energy storage technology designed to fight climate change using carbon dioxide (CO2) to accelerate the transition to renewable energy. The company's technology is based on a thermodynamic transformation of CO2 a closed-loop process to store energy and make renewable power dispatchable.

Key people:

6

Funding Rounds

$241.8m

Money raised

Solid Power is an industry developer of all-solid-state batteries.

3

Funding Rounds

$23.6m

Money raised

Nostromo is a company founded in 2017.

10

Funding Rounds

$21.3m

Money raised

Prieto Battery, Inc. is a company that focuses on commercializing patented Lithium-ion battery technology.

Key people:

4

Funding Rounds

$140.0m

Money raised

Aquion Energy is a company that manufactures sodium ion batteries and energy storage systems.

11

Funding Rounds

$45.9m

Money raised

Vorbeck Materials is a Jessup, Maryland-based company founded by John S. Lettow.

Location:

Key people:

4

Funding Rounds

$19.2m

Money raised

Voltaiq develops a software solution that is able to predict the performance of batteries and battery-powered systems.

Key people:

3

Funding Rounds

$1.2m

Money raised

Dreamweaver International is a company that produces lithium-ion battery separators, founded by Brian Morin.

1

Funding Rounds

Clearway Energy owns and operates more than 8 gigawatts of renewable and conventional energy assets across the country.

5

Funding Rounds

$18.5m

Money raised

Ionomr is a developer and manufacturer of hydrogen technologies including fuel cells, hydrogen fuel, and infrastructure and storage.

Location:

Key people:

3

Funding Rounds

$104.8m

Money raised

EcoFlow is a mobile power company that is reinventing the way the world accesses energy.

14

Funding Rounds

$82.5m

Money raised

ViZn Energy Systems is a company founded in 2009 by Craig Wilkins.

5

Funding Rounds

$261.9m

Money raised

6K is a North Andover, Massachusetts and New Cumberland, West Virginia-based custom fabrication and additive manufacturing company.

5

Funding Rounds

$167.5m

Money raised

Malta Inc is a company storing renewable energy in molten salt founded by X.

2

Funding Rounds

$100.0k

Money raised

Elegus Technologies is an Ann Arbor, Michigan-based company founded by Long Qian, Siuon Tung, Nicholas Kotov and John Hennessy.

4

Funding Rounds

$42.7m

Money raised

EnerG2 is a manufacturer of energy storage devices founded in 2003 by Chris Wheaton and Rick Luebbe.

7

Funding Rounds

$24.5m

Money raised

Invinity Energy Systems is a vanadium flow battery company.

9

Funding Rounds

$370.6m

Money raised

Boston-Power is a company that develops and manufactures next-generation lithium-ion battery cells.

Key people:

6

Funding Rounds

$282.5m

Money raised

Lilac Solutions is a company founded in 2016 by David Snydacker.

Key people:

6

Funding Rounds

$50.2m

Money raised

Sakti3 is a company that operates as a leader in the solid state battery technology.

5

Funding Rounds

$792.0m

Money raised

Redwood Materials is a battery recycling company founded in 2017.

2

Funding Rounds

$4.3m

Money raised

EST-Floattech BV is a Netherlands-based Energy Storage Solutions company.

Location:

Key people:

1

Funding Rounds

$750.0k

Money raised

Geli is a San Francisco-based company founded by Ryan Wartena and Crispell Wagner.

1

Funding Rounds

$1.3m

Money raised

suena is a software for optimizing energy storage devices founded in 2021.

8

Funding Rounds

$8.5m

Money raised

Rebound Technologies is a Denver-based company developing cold storage technology for cold-chain logistics companies.

Location:

2

Funding Rounds

$15.3m

Money raised

Hyperdrive designs and develops lithium-ion battery systems.

1

Funding Rounds

Fenix International is a company founded in 2009 by Mike Lin.

2

Funding Rounds

$1.0m

Money raised

MicroGen Systems is a company that offers solutions for Internet of Things systems

Key people:

8

Funding Rounds

$57.6m

Money raised

Cymbet Corporation is a microelectronic developing company.

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