Mainspring Energy Alternatives & Competitors

12 companies similar to Mainspring Energy — Accelerating the transition to the affordable, reliable, net-zero carbon grid of...

IPG Energy

Reinventing fuel-based power for the net-zero future

18 Grant $7.08M

London, United Kingdom

Energy Clean Energy +1

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Inspire

Transforming the way people access clean energy and accelerating the world toward a net-ze...

128 Seed $38.20M

Santa Monica, United Stat...

Energy Internet +5

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e-Zinc

Powering the energy transition

76 Series A $75.94M

Toronto, Canada

Energy Hardware +2

X-energy

Delivering the next generation of advanced nuclear energy technology.

1773 Series C 1 $2.78B

Rockville, United States

Energy Renewable Energy +1

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SB Energy

Accelerating the global energy transition (Redwood City, CA)

244 $4.50B

San Francisco, United Sta...

Energy Renewable Energy +1

GREENJOULES PVT LTD.

Remodel Waste to Power the Future

49 Series A $330.00M

Pune, India

Energy Renewable Energy +1

MoltexFLEX

Developer of the FLEX reactor: a nuclear reactor that can meet the global demand for clean...

16 Grant $1.30M

Warrington, United Kingdo...

Energy Clean Energy +1

Amogy

Decarbonizing hard-to-abate sectors with mature, scalable, and efficient ammonia-to-power...

181 Not Funded/Unknown $275.30M

Brooklyn, United States

Energy Renewable Energy +2

MAD Energy

MAD Energy is a clean energy infrastructure developer and operator while enabling energy t...

14 Private Equity $186.28M

Sandpoint, United States

Data Analytics Energy +3

Upstart Power

Your Key To Whole Home Energy Independence.

35 Venture round $39.64M

Southborough, United Stat...

Energy Manufacturing +1

CleanJoule

Superior fuels across aviation, aerospace and defense

27 $50.00M

Salt Lake City, United St...

Manufacturing Transportation +2

LineVision

Accelerating the Net Zero Grid

90 Series C $49.80M

Boston, United States

Analytics Big Data +2

About Mainspring Energy

Mainspring Energy is an energy startup founded in 2010 and headquartered in the United States, with a mission to accelerate the transition to the future grid. The company's slogan, "Accelerating the transition to the affordable, reliable, net-zero carbon grid of the future," encapsulates its focus on developing innovat...

Business keywords

Power Generation, Climate Change, Clean Technology, Energy Innovation, Engineering, Startup, Technology, Innovation, Grid Modernization, Fuel-flexible Power, Net-zero Carbon, Prototype Development, Stanford Engineers

Frequently Asked Questions

Companies similar to Mainspring Energy include IPG Energy, Inspire, e-Zinc, X-energy, SB Energy. They work in Energy and Clean Energy and share Mainspring Energy's focus on clean technology, startup and climate change.

Bounce Watch lists 12 companies that share Mainspring Energy's industries and are closest to it in business tags, services, target customers, business model and size.

From the desk

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In 7 business days we read 10 rivals around Mainspring Energy: 90 days of dated moves, ranked by what matters to you, each with its source. Fully credited if you continue.

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Mainspring Energy Profile IPG Energy Alternatives Inspire Alternatives e-Zinc Alternatives All Companies All Signals Trend Reports

Compiled from the BounceWatch company index. We last looked at Mainspring Energy on 12 Sep 2024. The 12 companies listed here were last checked between 11 Sep 2024 and 18 Aug 2025. Where a field is blank here, it means we have not recorded it — not that the answer is zero. How we source and date this.