Company lists · Data refreshed September 2026

Top 25 Gravity energy storage companies based in the United States

Name: Gravity energy storage companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 259 companies tracked

RevenueBase identified 259 gravity energy storage companies headquartered in the United States as of September 2026 and tracks 11,032 professional contacts across them, including 5,631 with verified work emails. Houston is the largest hub.

This list covers gravity energy storage companies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 16, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 16, 2026 86% judged on-target in blind review

259Companies

11,032Contacts tracked

5,631Verified emails

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The 25 largest gravity energy storage companies based in the United States

Ranked by team size

Top 25 of 259 gravity energy storage companies based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to gravity energy storage companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Fluence	Strong evidence	Arlington, VA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,863 contacts →
	Strong evidence “To achieve our mission, we design, deploy, and operate the world’s most advanced modular energy storage products, comprehensive lifecycle services, and AI-enabled asset management…” Source: RevenueBase Database · checked Sep 16, 2026
2	Ormat Technologies, INC	Indirect evidence	Reno, NV, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,281 contacts →
	Indirect evidence “With over five decades of experience, Ormat Technologies, Inc.” Source: RevenueBase Database · checked Sep 16, 2026
3	Form Energy	Partial evidence	Somerville, MA, United StatesHQ checked Sep 16, 2026	501-1,000	807 contacts →
	Partial evidence “Form Energy is an American company driving innovation in energy technology and manufacturing.” Source: RevenueBase Database · checked Sep 16, 2026
4	Stryten Energy	Strong evidence	Alpharetta, GA, United StatesHQ checked Sep 16, 2026	1,001-5,000	677 contacts →
	Strong evidence “Stryten Energy helps solve the world’s most pressing energy challenges with a broad range of energy storage solutions across the Essential Power, Motive Power, Transportation…” Source: RevenueBase Database · checked Sep 16, 2026
5	Strata Clean Energy	Partial evidence	Durham, NC, United StatesHQ checked Sep 16, 2026	501-1,000	631 contacts →
	Partial evidence “Strata Clean Energy is a fully integrated energy infrastructure company serving utilities, independent power producers, and hyperscalers navigating the rapid transformation of the…” Source: RevenueBase Database · checked Sep 16, 2026
6	EOS Energy Enterprises, INC	Partial evidence	Edison, NJ, United StatesHQ checked Sep 16, 2026	501-1,000	435 contacts →
	Partial evidence “Eos is on a mission to build a future with limitless energy-with abundant energy that is reliable enough to fuel humanity’s limitless potential.” Source: RevenueBase Database · checked Sep 16, 2026
7	ESS	Indirect evidence	Wilsonville, OR, United StatesHQ checked Sep 16, 2026	201-500	354 contacts →
	Indirect evidence “ESS, Inc.” Source: RevenueBase Database · checked Sep 16, 2026
8	Flexgen	Strong evidence	Durham, NC, United StatesHQ checked Sep 16, 2026	201-500	271 contacts →
	Strong evidence “FlexGen delivers the best integrated energy storage systems by taking a functionality and software-first approach.” Source: RevenueBase Database · checked Sep 16, 2026
9	Malta INC	Indirect evidence	Cambridge, MA, United StatesHQ checked Sep 16, 2026	n/a	264 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
10	Antora Energy	Partial evidence	San Jose, CA, United StatesHQ checked Sep 16, 2026	201-500	242 contacts →
	Partial evidence “Antora Energy delivers affordable, reliable energy to industry, data centers, and the grid.” Source: RevenueBase Database · checked Sep 16, 2026
11	POWIN	Partial evidence	Tualatin, OR, United StatesHQ checked Sep 16, 2026	501-1,000	242 contacts →
	Partial evidence “Since 2010, Powin has been working to mitigate the economic and environmental impacts of climate change by revolutionizing the way energy is generated, transmitted, and…” Source: RevenueBase Database · checked Sep 16, 2026
12	Energy Vault	Partial evidence	Westlake Village, VA, United StatesHQ checked Sep 16, 2026	51-200	203 contacts →
	Partial evidence “Energy Vault® is an integrated power infrastructure platform that builds, owns and operates flexible, reliable energy systems to accelerate time-to-power for utilities…” Source: RevenueBase Database · checked Sep 16, 2026
13	Jupiter Power	Strong evidence	Austin, TX, United StatesHQ checked Sep 16, 2026	51-200	188 contacts →
	Strong evidence “Jupiter Power is putting deep energy storage expertise, proven project execution capability, and significant capital to work to help make the energy transition a reality.” Source: RevenueBase Database · checked Sep 16, 2026
14	Rondo Energy	Indirect evidence	Alameda, CA, United StatesHQ checked Sep 16, 2026	51-200	145 contacts →
	Indirect evidence “We're hiring!” Source: RevenueBase Database · checked Sep 16, 2026
15	Convergent Energy And Power	Strong evidence	New York, United StatesHQ checked Sep 16, 2026	51-200	143 contacts →
	Strong evidence “Convergent Energy and Power manages all aspects of energy storage development for its grid operator, utility, and industrial customers.” Source: RevenueBase Database · checked Sep 16, 2026
16	Lion Energy	Partial evidence	American Fork, UT, United StatesHQ checked Sep 16, 2026	51-200	138 contacts →
	Partial evidence “Lion Energy is building the future of intelligent energy infrastructure.” Source: RevenueBase Database · checked Sep 16, 2026
17	CS Energy	Partial evidence	Edison, NJ, United StatesHQ checked Sep 16, 2026	51-200	128 contacts →
	Partial evidence “CS Energy is now part of SOLV Energy.” Source: RevenueBase Database · checked Sep 16, 2026
18	Esvolta, LP	Strong evidence	Newport Beach, CA, United StatesHQ checked Sep 16, 2026	51-200	119 contacts →
	Strong evidence “Focused on sustainability and innovation, esVolta develops, owns, and operates reliable utility-scale energy storage assets across the entire lifecycle - delivering value for…” Source: RevenueBase Database · checked Sep 16, 2026
19	Peak Energy	Strong evidence	San Francisco Bay, CA, United StatesHQ checked Sep 16, 2026	51-200	117 contacts →
	Strong evidence “Peak Energy is an American venture setting the standard in low-cost, giga-scale storage for the new era of clean, affordable, and reliable energy.” Source: RevenueBase Database · checked Sep 16, 2026
20	KEY Capture Energy	Strong evidence	Albany, NY, United StatesHQ checked Sep 16, 2026	51-200	114 contacts →
	Strong evidence “Key Capture Energy identifies, develops, constructs and operates energy storage solutions to foster greater deployment of renewable energy, create a more stable electric grid, and…” Source: RevenueBase Database · checked Sep 16, 2026
21	Enervenue	Strong evidence	Fremont, CA, United StatesHQ checked Sep 16, 2026	201-500	99 contacts →
	Strong evidence “EnerVenue is commercializing energy storage systems designed to behave like infrastructure, prioritizing endurance, safety, and lifecycle economics over short-term optimization.” Source: RevenueBase Database · checked Sep 16, 2026
22	Amber Kinetics	Strong evidence	Union City, CA, United StatesHQ checked Sep 16, 2026	51-200	88 contacts →
	Strong evidence “Amber Kinetics is the industry-leader in manufacturing flywheel energy storage systems (FESS).” Source: RevenueBase Database · checked Sep 16, 2026
23	Doosan Gridtech	Strong evidence	Bellevue, WA, United StatesHQ checked Sep 16, 2026	51-200	86 contacts →
	Strong evidence “Doosan GridTech® has been providing end-to-end energy storage solutions since 2011.” Source: RevenueBase Database · checked Sep 16, 2026
24	Spearmint Energy	Strong evidence	Miami, FL, United StatesHQ checked Sep 16, 2026	51-200	83 contacts →
	Strong evidence “Spearmint Energy is a leading company focused on developing, owning, operating, and optimizing battery energy storage systems ("BESS") to reduce grid volatility and increase…” Source: RevenueBase Database · checked Sep 16, 2026
25	Eolian	Strong evidence	Burlingame, CA, United StatesHQ checked Sep 16, 2026	51-200	75 contacts →
	Strong evidence “Eolian’s proven and enviable track record is evidenced by the successful funding and development of nearly 30 GW of operating or under-construction energy storage, solar, and wind…” Source: RevenueBase Database · checked Sep 16, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: gravity energy storage companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names gravity energy storage companies.
Partial evidence: Its own public description names part of gravity energy storage companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name gravity energy storage companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 259 gravity energy storage companies based in the United States

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Gravity energy storage companies based in the United States at a glance

As of Sep 16, 2026

51.0%Verified-email coverage

42.6Average contacts per company

11-50Median size (employees)

5.8%Largest-city concentration · Houston

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

103

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 259 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among gravity energy storage companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “gravity energy storage companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names gravity energy storage companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among gravity energy storage companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 5,631 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 16, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names gravity energy storage companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many gravity energy storage companies are there based in the United States?

RevenueBase identified 259 gravity energy storage companies headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Fluence, headquartered in Arlington, tops this list with the largest team on record.

Which city has the most gravity energy storage companies?

Houston leads with 15 headquartered companies, followed by New York (13) and Los Angeles (7).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 5,631 verified decision-maker contacts tracked across these 259 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 16, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.