What they do:
Building the world's first fusion power plant
Quick facts:
HQ: Seattle, WA, United States
Top Climate & Energy Startups in Washington State
This list has 10 startups and was last updated on Oct 15, 2026. 2 of them are hiring right now. Largest teams: Helion Energy, Starcloud, and Rebellyous Foods. Latest round: LevelTen Energy raised $2M (Oct 8, 2026).
10 startups
Starcloud
Hiring
What they do:
Data centers in space
Quick facts:
HQ: Seattle, WA, United States
What they do:
Rebellyous Foods is a food manufacturing technology and production…
Quick facts:
HQ: Seattle, WA, United States
Silurian
Hiring
What they do:
Foundation models to simulate Earth, starting with weather.
Quick facts:
HQ: Seattle, WA, United States
What they do:
We design and manufacture energy efficient LED lighting fixtures for…
Quick facts:
HQ: Seattle, WA, United States
Quick facts:
HQ: Tukwila, WA, United States
Funding:
$14.9M · Options · Jan 2026
Quick facts:
HQ: Seattle, WA, United States
Funding:
$2.38M · Equity · May 2026
Quick facts:
HQ: Seattle, WA, United States
Funding:
$2M · Equity · Oct 2026
Quick facts:
HQ: Camas, WA, United States
Incorporated: 2026
Funding:
$1M · Equity · Oct 2026
Valor Water Analytics
Acquired
What they do:
Valor Water Analytics delivers a SaaS platform to utilities to detect…
Quick facts:
HQ: Seattle, WA, United States
Questions and answers
How many startups are on this list?
There are 10 startups on this list, last updated on Oct 15, 2026.
Which of them are hiring?
2 of them are hiring right now, including Starcloud and Silurian.
Which of them have the largest teams?
By team size: Helion Energy (150 employees), Starcloud (12 employees), and Rebellyous Foods (12 employees).
Which of them raised money recently?
Latest rounds: LevelTen Energy — $2M Equity (Oct 2026), Infrawatt — $1M Equity (Oct 2026), and Teichos Energy — $2.38M Equity (May 2026).