Hot Climate & Energy startups hiring

First on the list in November 2026: Helion, Endurance Energy and Thea Energy.

Latest to raise: Voltus, which raised $225M Series D in October 2026. Updated November 11, 2026, using Saywise's data on startup funding and open roles. See how we rank them.

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The top 25, November 2026

1
Helion
Building the world's first fusion power plant
Raised $465M Series G in June 2026
13 new roles in 30 days
YC S14
Investors: Y Combinator, Thrive Capital
61open roles$117k – $375k a year
2
Endurance Energy
Endurance is a Seattle-based start-up building the world’s first commercial subsea geothermal power systems.
Raised $54M Series A in June 2026
9 new roles in 30 days
Backed by Founders Fund
Investors: Founders Fund
22open roles$100k – $325k a year
3
Thea Energy
Breakthrough fusion technology designed for operation and scale.
Raised $100M Series B in August 2026
19 new roles in 30 days
Investors: General Innovation Capital Partners (GICP), Linse Capital, US Innovative Technology Fund (USIT)
57open roles$75k – $300k a year

4
Torus
Raised a Pre-seed round in September 2026
12 new roles in 30 days
YC S26
Investors: Y Combinator
35 open roles$58k – $250k a year
5
Commonwealth Fusion Systems
Designing and building commercial fusion systems to provide limitless, clean energy to the world
Raised a Series B round in July 2026
56 new roles in 30 days
Backed by Khosla Ventures
Investors: Khosla Ventures, Tiger Global Management, Coatue, Breakthrough Energy Ventures
138 open roles$70k – $300k a year
6
Voltus
Better energy.
Raised $225M Series D in October 2026
5 new roles in 30 days
Investors: Activate Capital, Generation Investment Management, Vitol
11 open roles$70k – $220k a year
7
Xcimer Energy
We build lasers for commercial fusion energy and next-generation defense.
Raised a round in September 2026
16 new roles in 30 days
Investors: Hedosophia
64 open roles$92k – $391k a year
8
Panthalassa
The open ocean is Earth’s largest and most power-dense renewable energy resource.
Raised a Other round in August 2026
16 new roles in 30 days
Investors: Peter Thiel
52 open roles$80k – $350k a year
9
Heron Power
Creating the foundational technology to meet tomorrow's complex energy demands.
Raised a Debt round in September 2026
19 new roles in 30 days
Investors: Capricorn Investment Group
40 open roles$85k – $240k a year
10
Kairos Power
Kairos Power was founded to accelerate the development of innovative nuclear technology.
Raised a Other round in September 2026
17 new roles in 30 days
35 open roles$92k – $330k a year
11
Antora Energy
Raised $550M Series C in July 2026
8 new roles in 30 days
Investors: Eclipse, G2 Venture Partners
39 open roles$97k – $315k a year
12
Vital Lyfe
Raised $18M Seed in December 2025
5 new roles in 30 days
Backed by General Catalyst
Investors: General Catalyst, Interlagos
15 open roles$95k – $170k a year
13
Peak Energy
The Storage Standard for the New Era of Energy
Raised $80M Series B in July 2026
6 new roles in 30 days
22 open roles$120k – $290k a year
14
Gridware
Protecting the grid today, preparing the grid for tomorrow
Raised $55M Series B in November 2025
5 new roles in 30 days
YC W21
Investors: Y Combinator, Tiger Global Management, Generation Investment Management
18 open roles$105k – $295k a year
15
Radiant
HubSpot & Sales as a Service for Tech, Finance, SaaS & Professional Services
Raised $300M Series D in February 2026
40 new roles in 30 days
Investors: Boost VC, Draper Associates
101 open roles$86k – $314k a year
16
Jetson Home
Clean, zero-carbon heating and cooling for your home, made simple.
Raised $50M Series A in January 2026
13 new roles in 30 days
Investors: Eclipse
39 open roles$65k – $240k a year
17
VE
VEIR
Raised $110M Series C in October 2026
3 new roles in 30 days
Investors: Matter Venture Partners, Tyche Partners
11 open roles$95k – $200k a year
18
Critical Loop
Accelerating access to power
Raised $26M Series A in April 2026
12 new roles in 30 days
Investors: Conifer Infrastructure Partners, Hanover
18 open roles$70k – $300k a year
19
SPAN
Enabling electrification for all
Raised $163.3M Other in March 2026
12 new roles in 30 days
18 open roles$100k – $300k a year
20
Mainspring Energy
We deliver local power where and when you need it.
16 new roles in 30 days
Backed by General Catalyst
Investors: General Catalyst
85 open roles$85k – $335k a year
21
Zeitview
For global customers in energy and infrastructure, Zeitview builds advanced inspection software that delivers fast, accurate insights, lowers costs, and improv…
14 new roles in 30 days
YC W15
Investors: Y Combinator
34 open roles$70k – $225k a year
22
Critical Energy
Raised $22M Seed in June 2026
4 new roles in 30 days
Investors: Susa Ventures, Upfront Ventures
5 open roles$140k – $220k a year
23
Lunar Energy
Brilliantly designed products for endless clean energy.
Raised $102M Series D in February 2026
8 new roles in 30 days
Investors: B Capital, Prelude Ventures
20 open roles$90k – $260k a year
24
WindBorne Systems
Building a planetary nervous system
Raised $37M Series B in August 2026
1 new role in 30 days
Backed by Khosla Ventures
Investors: Khosla Ventures, Bill & Melinda Gates Foundation, Galvanize
3 open roles$110k – $200k a year
25
Base Power Company
Base is building the future of American power.
Raised $1B Series D in August 2026
2 new roles in 30 days
Investors: Addition, JPMorganChase's Strategic Investment Group, Ribbit, Valor Equity Partners
15 open roles

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