About ESS Inc
ESS Inc is a publicly listed company based in Wilsonville (United States) founded in 2011. Provider of iron flow battery-based energy storage system. ESS Inc has raised $46.2 million across 7 funding rounds from investors including Honeywell, Munich Re and BASF. The company has 240 employees. Its website essinc.com draws about 19 thousand monthly visits. ESS Inc offers products and services including Energy Base™, Energy Center™, and Energy Warehouse®. Its focus areas include Energy Tech, Energy Storage Tech, Energy Storage System and Redox Flow. Its legal entity is ESS Tech, Inc. Its competitors include Quino Energy and Jolt Energy; 2 of its 2 listed competitors have raised funding.
Company details
ESS was founded in 2011 and is headquartered in Wilsonville, United States. Energy storage solutions based on iron flow battery technology are developed and supplied by the company within the renewable energy sector. Operations center on battery systems that utilize non-toxic iron and saltwater electrolytes to enable long-duration storage. Services include technology integration for grid-scale applications across various geographic markets.
- Headquarters Wilsonville, United States
- Employees 240
- Stage Public
- SectorsEnergy & Utilities
- Phone•••• ••••
- Website essinc.com
- Social LinkedIn X Facebook YouTube
- Legal Name Ess Tech, Inc.
- Annual Revenue$1.58 M (USD)-74.85as on Dec 31, 2025
- Net Profit-$63.44 M (USD)26.42as on Dec 31, 2025
- EBITDA-$49.96 M (USD)41.27as on Dec 31, 2025
- Total Equity Funding$46.2M (USD)
in 7 rounds
- Latest Funding Round$31M (USD), Post-IPO
Jul 2025
- InvestorsHoneywell
& 15 more
- Employee Count240
Products & Services of ESS Inc
ESS Inc offers a comprehensive portfolio of products and services, including Energy Base™, Energy Center™, and Energy Warehouse®.
Provides up to 22 hours of iron flow battery storage for data centers.
Offers scalable solutions for utility-scale energy applications.
Delivers flexible, long-duration storage for industrial microgrids.
Apps and channels of ESS Inc
its YouTube channel ESS Tech, Inc. has 1.17K subscribers and 27 videos.
Videos from ESS Inc
The most watched videos on ESS Inc's YouTube channel, ESS Tech, Inc. (1.17K subscribers). Click a video to play it here.
More on ESS Tech, Inc..
Funding Insights of ESS Inc
ESS Inc has successfully raised a total of $46.2M across 7 strategic funding rounds. The most recent funding activity was a Post-IPO round of $31 million completed in July 2025. This substantial capital infusion reflects strong investor confidence in the company's business model, growth potential, and market opportunities. The funding enables strategic expansion, product development, market penetration, and operational scaling to drive long-term value creation and competitive advantage.
- Total Funding $46.2M
- Total Rounds 7
- Last Round Post-IPO — $31M
- First Round $2.1M
(Jun 2012)
- Investors Count 16
All 7 funding rounds of ESS Inc with amounts and investors; the two latest post-money valuations are shown, the rest are part of the premium plan.
| Date | Amount | Transaction Name | Valuation | Lead Investors | Investors |
|---|---|---|---|---|---|
| Jul 2025 | $31M | Post-IPO | – | – | |
| Sep 2023 | $27.5M | Post-IPO | – | Honeywell | – |
| Sep 2021 | Post-IPO | – | – | ||
| Oct 2019 | $30M | Series C | – | SB Energy, Breakthrough Energy | |
| Dec 2017 | $13M | Series B | – | BASF, Cycle Capital | |
| Oct 2015 | $3.2M | Series A | – | Pangaea Ventures | |
| Jun 2012 | $2.1M | Grant | – | – |
16 investors in total: 16 institutional.
Investors in ESS Inc
ESS Inc has secured backing from 16 investors, including institutional and venture fund investors. Prominent investors backing the company include Honeywell, Munich Re and BASF.
| Investor | Description | Founded Year | Domain | Location |
|---|---|---|---|---|
Chemical startups are invested in by BASF Venture Capital fund. | basf.com/de/de/company/about-us/companies/basf-venture-capital.html | Ludwigshafen, Germany | ||
US, Canada, and China are targeted for venture capital investments. | presidiopartners.com | San Francisco, United States | ||
Cycle Capital is engaged in venture capital for clean tech innovations. | cyclecapital.com | Montreal, Canada | ||
Investment in hard tech for planetary health, focusing on materials science, chemistry, and biology. | pangaeaventures.com | |||
Climate solutions are advanced via venture capital and startup acceleration. | breakthroughenergy.org | Kirkland, United States | ||
Early-stage investments in cleantech companies are provided by E8. | e8angels.com | Seattle, United States | ||
High-risk energy technologies are funded through competitive grants. | arpa-e.energy.gov | Washington, Dc, United States | ||
Diversified electronics and automation equipment are manufactured and supplied. | 1885 | honeywell.com | United States | |
Platform offering insurance risk management solutions | 1880 | munichre.com | Munich, Germany | |
Invests in energy innovations like renewables and utilities. | 2015 | evergyventures.com | Kansas City, United States |
Investor details for ESS Inc
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People of ESS Inc
11 people are tracked at ESS Inc (4 in leadership, 5 in board & advisors, 2 in team); the tracked headcount is 240.
| Name | Role | Group |
|---|---|---|
Brian Lisiecki | VP, Information & Business Systems | Leadership |
Sloane Klonsky | VP - Head Of Fp&a & Corporate Finance, Treasurer | Leadership |
Kendra Larsen | Vice President Human Resources | Leadership |
Julia Song | CTO & Founder | Leadership |
Rich Hossfeld | Director | Board & advisors |
Michael R. Niggli | Founding Chairman | Board & advisors |
Kyle Teamey | Director | Board & advisors |
Alexi Wellman | Director | Board & advisors |
Harry Quarls | Chairman | Board & advisors |
Richard Araujo | Senior Talent Acquisition Specialist | Team |
Benjamin Heng | SVP, Engineering | Team |
Complete people profiles for ESS Inc
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IPO & Listings of ESS Inc
ESS Inc is a publicly listed company on the NYSE with ticker symbol GWH in USA, operating in the Producer manufacturing sector. As a publicly traded entity, the company provides investors with opportunities to participate in its growth story through equity ownership. The listing enables access to capital markets, enhances corporate visibility, and provides liquidity for shareholders while maintaining transparency through regulatory compliance and regular financial disclosures.
- IPO date11 Oct 2021
- Listed onNYSE: GWH
- Listed entityESS Tech, Inc.
- Exchange sectorProducer manufacturing
- ISINUS26916J2050
- Share price$0.16 (-7.82% on the day) · 2026-10-01
- Market capitalisation$6.3M
- EPS (diluted, trailing year)$-2.94
- Volume (last session)1,523,385
Financials of ESS Inc
| Year | Revenue | Net income | EBITDA |
|---|---|---|---|
| 2025 | $1.6M | -$63.4M | -$50.0M |
| 2024 | $6.3M | -$86.2M | -$85.1M |
| 2023 | $7.5M | -$77.6M | -$78.2M |
| 2022 | $894,000 | -$78.0M | -$102.8M |
| 2021 | -$477.1M | -$60.0M |
Detailed financial statements for ESS Inc
Statement rows, ratios, five-year trends and downloadable financials of the group companies require an active premium plan.
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Timeline of ESS Inc
4 dated milestones of ESS Inc across 14 years, from founding to its latest funding, stage changes and deals.
- Founded ESS Inc is founded.
- Funding First funding round of $2.1M.
- IPO Lists on the stock exchange (IPO).
- Funding Latest funding round, Post-IPO, of $31.0M.
Competitors of ESS Inc
ESS Inc has 2 listed competitors in our database, 2 of them funded. They include Quino Energy and Jolt Energy.
| Company Name | Domain | Founded | HQ Location | Total funding | Employees | Description |
|---|---|---|---|---|---|---|
| quinoenergy.com | 2021 | Menlo Park, United States | $4.66M | 3 | Provider of solutions for energy storage systems | |
| jolt-energy.com | 2014 | Holland, United States | $4M | Sustainable energy storage solutions are developed for grid-scale applications. |
Detailed competitors of ESS Inc
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Web traffic of ESS Inc
The website of ESS Inc (essinc.com) receives about 19.2K visits a month.
- Monthly visits19.2K
▼ 10.5% vs previous month
Websites whose visitors overlap most with ESS Inc. Affinity shows how closely the audiences match.
| Website | Domain | Audience affinity | Monthly visits | Global rank | Profile |
|---|---|---|---|---|---|
| fluenceenergy.com | 100% | 87.4K | #350,139 | View details | |
rechargenews.com | rechargenews.com | 89% | #230,977 | – | |
| formenergy.com | 89% | 29.9K | #893,216 | View details | |
| alliantenergy.com | 89% | 762.1K | #56,575 | View details | |
| utilitydive.com | 89% | 680.7K | #209,460 | View details | |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
All 10 similar websites and full traffic analytics for ESS Inc
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Top companies in Energy Storage Systems
3 companies that operate in the same segment as ESS Inc (Energy Storage Systems) in United States, ranked by their profile score on The Company Check.
| Company | Description | Founded | Location | Total funding | Revenue | Employees |
|---|---|---|---|---|---|---|
Electric buses and charging systems are manufactured for fleets. | 2004 | Burlingame, California, United States | USD 857.79 M | USD 309.36 M | 418 | |
Silicon-based solar PV modules are manufactured for diverse applications. | 1985 | San Jose, California, United States | USD 171.73 M | USD 300 M | 600 | |
Iron-air energy storage systems are developed for renewable energy projects. | 2009 | Somerville, Massachusetts, United States | USD 2 B | 902 |
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Related news about Ess Inc
Complete news archive for ESS Inc
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Frequently Asked Questions about ESS Inc
ESS Inc was founded in 2011 and raised its 1st funding round 1 year after it was founded.
ESS Inc is headquartered in Wilsonville, United States. It is registered at Wilsonville, Oregon, United States.
ESS Inc is a funded company, having raised a total of $46.2M across 7 funding rounds to date. The company's 1st funding round was a Grant of $2.1M, raised on Jun 2012.
ESS Inc has 240 employees.
Annual revenue of ESS Inc is $1.58M as on Dec 31, 2025.
ESS was founded in 2011 and is headquartered in Wilsonville, United States. Energy storage solutions based on iron flow battery technology are developed and supplied by the company within the renewable energy sector. Operations center on battery systems that utilize non-toxic iron and saltwater electrolytes to enable long-duration storage. Services include technology integration for grid-scale applications across various geographic markets.
ESS Inc's top competitors include Quino Energy and Jolt Energy.
ESS Inc offers Energy Base™, Energy Center™, and Energy Warehouse®.
Yes, ESS Inc is publicly traded on NYSE under the ticker symbol GWH.
ESS Inc has 16 investors. Key investors include Honeywell, Munich Re, BASF, PTT Global Chemical, and IPM LLP.
ESS Inc operates through Ess Tech, Inc..