Momentus
Public
What they do:
The space infrastructure services company
Quick facts:
HQ: San Francisco, CA, United States
Top Climate & Energy Startups in San Francisco
This list has 90 startups and was last updated on Oct 15, 2026. 13 of them are hiring right now. Largest teams: Cruise, Momentus, and Gridware. Latest round: Aikido Technologies raised $1.72M (Oct 8, 2026).
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Oklo
Public
What they do:
Emission free, always on power from advanced fission power plants.
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HQ: San Francisco, CA, United States
Gridware
Hiring
What they do:
Protecting the grid today, preparing the grid for tomorrow
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HQ: San Francisco, CA, United States
What they do:
Autonomous electric airplanes
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HQ: San Francisco, CA, United States
Shepherd
Hiring
What they do:
Modernizing commercial insurance
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HQ: San Francisco, CA, United States
What they do:
Cheese and dairy products from plant-derived dairy proteins
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HQ: San Francisco, CA, United States
What they do:
Lygos (W16) built and commercialized sustainable, high-performance…
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HQ: San Francisco, CA, United States
Reach
Hiring
What they do:
Long range, wireless energy distribution that scales
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HQ: San Francisco, CA, United States
What they do:
Enterprise software to quantify cost-effective decarbonization…
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HQ: San Francisco, CA, United States
What they do:
We make EV charging as simple and reliable as LED lights
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HQ: San Francisco, CA, United States
Living Carbon
Hiring
What they do:
maximizing biomass on low quality land
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HQ: San Francisco, CA, United States
What they do:
Predictive battery management software for electrified fleets
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HQ: San Francisco, CA, United States
Charge Robotics
Hiring
What they do:
Robots that build solar farms
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HQ: San Francisco, CA, United States
What they do:
Water risk mitigation for industrial sites
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HQ: San Francisco, CA, United States
What they do:
Nuclear-inspired cooling that turns wasted power into more AI compute
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HQ: San Francisco, CA, United States
AirMyne
Hiring
What they do:
Building systems to remove carbon dioxide from air at industrial scale
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HQ: San Francisco, CA, United States
What they do:
Curtsy is a sustainable clothing resale app.
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HQ: San Francisco, CA, United States
Posh
Hiring
What they do:
Rapidly deployable energy solutions for modern commercial and…
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HQ: San Francisco, CA, United States
What they do:
Bluedot is a single payment platform for EV drivers and fleets.
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HQ: San Francisco, CA, United States
What they do:
We design and build microbes to make chemicals greener at lower cost.
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HQ: San Francisco, CA, United States
What they do:
Predictive Explorer and Driller for Critical Metal Deposits
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HQ: San Francisco, CA, United States
Nectar
Hiring
What they do:
Manage energy cost & usage with AI for facility & sustainability teams
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HQ: San Francisco, CA, United States
Coperniq
Hiring
What they do:
Workflow software for solar & energy contractors ☀️😎
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HQ: San Francisco, CA, United States
Maritime Fusion
Hiring
What they do:
Fusion reactors for ships
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HQ: San Francisco, CA, United States
Torus
Hiring
What they do:
Legora for physical engineering firms
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HQ: San Francisco, CA, United States
What they do:
Wren is a monthly subscription to offset your carbon footprint.
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HQ: San Francisco, CA, United States
What they do:
Ultra-precise AI weather forecasting.
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HQ: San Francisco, CA, United States
What they do:
A single point integration for secure and automated EV charging.
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HQ: San Francisco, CA, United States
What they do:
using ultrasonics + ml to analyze fluid behavior at infrastructure…
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HQ: San Francisco, CA, United States
Terranox AI
Hiring
What they do:
The first AI-powered uranium discovery company
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HQ: San Francisco, CA, United States
Edviro
Hiring
What they do:
AI That Operates Energy Infrastructure
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HQ: San Francisco, CA, United States
What they do:
We turn CO2 into battery-grade graphite and oxygen.
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HQ: San Francisco, CA, United States
What they do:
We stop cows from burping methane.
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HQ: San Francisco, CA, United States
What they do:
We make bacteria and plants that clean up pollution.
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HQ: San Francisco, CA, United States
What they do:
Make diesel semi trucks hybrid-electric
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HQ: San Francisco, CA, United States
What they do:
Enzyme design models.
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HQ: San Francisco, CA, United States
Questions and answers
How many startups are on this list?
There are 90 startups on this list, last updated on Oct 15, 2026.
Which of them are hiring?
13 of them are hiring right now, including Gridware, Shepherd, and Reach.
Which of them have the largest teams?
By team size: Cruise (3,000 employees), Momentus (125 employees), and Gridware (125 employees).
Which of them raised money recently?
Latest rounds: Aikido Technologies — $1.72M Equity (Oct 2026), American Terawatt — $52.6M Equity (May 2026), and Halcyon Carbon — $21M Equity (Mar 2026).