Loading organizations...

ESS is a technology company.
ESS Tech Inc. engineers and manufactures long-duration iron flow battery systems, providing scalable energy storage. These systems deliver over four hours of energy discharge, serving utility-scale, commercial, industrial, and microgrid applications. Their proprietary technology leverages abundant iron, salt, and water-based electrolytes, ensuring safe, sustainable, and cost-effective renewable energy integration and grid resilience.
Co-founders Craig Evans and Dr. Julia Song began developing their innovative technology from a Portland garage in 2011. Their insight addressed the critical demand for safer, environmentally benign, and cost-efficient alternatives to traditional battery storage. Dr. Song, as Chief Technology Officer, pioneered the iron flow battery technology forming ESS Tech's core offering.
ESS Tech Inc. supplies its energy storage systems to utility companies, large commercial enterprises, and industrial facilities requiring reliable, clean energy. The company’s vision centers on accelerating decarbonization through long-lasting, sustainable energy storage. They aim to power communities and industries with resilient, clean energy, reducing fossil fuel dependency.
ESS has raised $43.0M across 2 funding rounds.
ESS has raised $43.0M in total across 2 funding rounds.
ESS has raised $43.0M in total across 2 funding rounds.
ESS's investors include Breakthrough Energy Ventures, SoftBank, BASF Venture Capital, Cycle Capital Management, Evergy Ventures, IPM Group, Pangaea Ventures, Presidio Partners, PTT Global Chemical, Markus Solibieda, Andrée-Lise Méthot.
Direct answer: ESS is most commonly either (A) ESS Technology, a California–based semiconductor/audio IP company known for its SABRE DACs and audio codecs, or (B) ESS, Inc. (NYSE: GWH), a Wilsonville, Oregon company that builds long‑duration iron‑flow energy storage systems; both are technology companies but operate in very different markets[1][2].
High‑Level Overview
Origin Story
Core Differentiators
Role in the Broader Tech Landscape
Quick Take & Future Outlook
If you want, I can:
ESS has raised $43.0M across 2 funding rounds. Most recently, it raised $30.0M Series C in October 2019.
| Date | Round | Lead Investors | Other Investors |
|---|---|---|---|
| Oct 29, 2019 | $30.0M Series C | Breakthrough Energy Ventures, SoftBank | BASF Venture Capital, Cycle Capital Management, Evergy Ventures, IPM Group, Pangaea Ventures, Presidio Partners, PTT Global Chemical |
| Dec 1, 2017 | $13.0M Series B | Markus Solibieda | BASF Venture Capital, Andrée-Lise Méthot, IPM Group, Pangaea Ventures, Presidio Partners |