FundedIQ
Consumer Electronics

ESS

ESS specializes in providing energy storage solutions for various applications such as commercial and industrial, utility, microgrid, and off-grid settings. Since their establishment in 2011, ESS has been dedicated to paving the way for a future fueled by clean and dependable energy. With a highly experienced team in the field of distributed power generation and energy storage technologies, ESS has successfully developed a cost-effective energy management system. This system utilizes a secure, plentiful, and non-harmful iron-electrolyte combined with their patented flow cell design. This efficient and affordable technology makes ESS's solutions suitable for a wide range of applications, ranging from managing energy in retail settings to integrating renewable energy on a larger scale.

www.essinc.com Wilsonville, United States 251-500 employees
Total raised
$398M
Latest round: +4% of prior total
Rounds
6
Latest
Series Unknown
Jan 2026

ESS specializes in providing energy storage solutions for various applications such as commercial and industrial, utility, microgrid, and off-grid settings. Since their establishment in 2011, ESS has been dedicated to paving the way for a future fueled by clean and dependable energy. With a highly experienced team in the field of distributed power generation and energy storage technologies, ESS has successfully developed a cost-effective energy management system. This system utilizes a secure, plentiful, and non-harmful iron-electrolyte combined with their patented flow cell design. This efficient and affordable technology makes ESS's solutions suitable for a wide range of applications, ranging from managing energy in retail settings to integrating renewable energy on a larger scale.

ESS has raised $398M across 6 rounds. Its most recent round was a Series Unknown of $15.0M in Jan 2026. Full funding history, investors, and team are detailed below.

Funding history

6 rounds · 1 visible Unlock with plan

6 rounds on record — latest round shown, the rest unlock with a paid plan.

Date
Round
Amount
Lead investor
Jan 29, 2026
Series Unknown
$15.0M

Unlock 5 earlier rounds — dates, amounts, round types — plus the lead investor for every round.

Unlock funding history →

People

Unlock with plan

Founders, executives, and decision-makers — sourced and refreshed weekly.

Name
Role
LinkedIn

See who runs this company — founders and key execs, with titles and LinkedIn profiles, ready to export.

Unlock people data →

ESS is featured in

Similar companies

BRINC

BRINC is an American technology company building a new class of drones to keep people safe in dangerous situations: First Response Drones. BRINC creates highly-reliable systems with the advanced ability to fly indoors and provide 2-way communication, to protect first responders, citizens, and our communities.

Series Unknown $125M
Viken Detection

Viken Detection is a company that specializes in research and developing technology related to X-ray physics and analytical device design. Their devices are used for security imaging and identifying materials to protect the public from terrorism and other threats. This enables law enforcement and safety agencies to effectively combat drug trafficking. Viken was established in 2013 and is headquartered in Newton, Massachusetts, USA.

Private Equity
D-Wave Quantum

D-Wave provides development and delivery of quantum computing systems, software and services, and is the world’s first commercial supplier of quantum computers—and the only company building both annealing quantum computers and gate-model quantum computers. Our mission is to unlock the power of quantum computing today to benefit business and society.

Series Unknown $1.6M
Tantalus Systems

Tantalus provides Smart Grid communications solutions for Advanced Metering, Demand Response & Distribution Automation. TUNet® — the Tantalus Utility Network — is a rapid & reliable two-way network that enables electric, water & gas distributors to automate processes, improve business operations and deliver top-tier customer service. TUNet is deployed at utilities determined to manage resources intelligently and meet ambitious conservation goals.

Series Unknown $20.0M
Etched.ai

Etched.ai is the creator of Sohu, an AI chip specifically designed for transformer models. By integrating the transformer architecture into their chips, Etched.ai is leading the way in developing servers tailored for transformer inference.

Series Unknown $800M
Aivela

Aivela offers hardware and software for capturing, analyzing, and managing visual and sensor data. The portfolio includes cameras, optics, lighting, and workflow software used for motion analysis, inspection, and experimental testing. Services cover solution design, system integration, calibration, and training to support deployment in laboratory and production settings. Products integrate with common data acquisition and analytics tools and support synchronized triggering, high frame rates, and structured data management. Aivela serves engineering and research teams that need to document fast processes, quantify behavior, and produce repeatable measurements.

Angel $3.0M
Tombot

Tombot is a company that focuses on developing robotic animals and digital health solutions for a market of over 200 million individuals with dementia or mild cognitive impairment. Studies have shown that their robotic animals can help decrease symptoms like loneliness, anxiety, depression, hallucinations, and aggressive behavior associated with dementia, and lessen the reliance on potentially harmful medications. Their goal is reflected in their slogan, "A dog for individuals unable to have real dogs."

Series A $7.0M
Reed Semiconductor

Reed Semiconductor engages in semiconductor research and development. It was founded in 2020 and headquartered in East Greenwich, Rhode Island.

Series Unknown $100M
Ambiq Micro

Ambiq Micro is a start-up semiconductor company that focuses on creating advanced low-power solutions for wireless electronic devices. The company was established in 2010 with the fundamental belief that extremely low-power semiconductors are vital for the future of technology. Leveraging their cutting-edge low-power technology, Ambiq Micro assists innovative companies globally in developing unique solutions that minimize or remove the necessity for batteries, decrease total system power, and enhance industrial design flexibility.

Series Unknown $179M
Hyperlight

HyperLight provides thin-film lithium niobate photonic integrated circuit solutions. They deliver groundbreaking electro-optic and nonlinear optical solutions with scalable manufacturing processes. They work closely with their customers from conceptualization, design, prototyping, and transfer to volume production.

Series C $80.0M
Gulf Coast Tactical

Gulf Coast Tactical is a manufacturer of autonomous maritime defense platforms enhancing security, surveillance, and readiness.

Seed $200k
Clair Health

Clair Health is a health technology company developing a wearable device that functions as a continuous, non-invasive hormone monitor designed specifically for women.

Seed $11.6M
Free · Every Monday

Know which startups just got funded. Every week.

Fresh funding rounds, new companies, and the sectors moving fastest — in your inbox every Monday morning.

Free. Sent every Monday. Unsubscribe anytime.