Mainspring Energy
14 known investors
Mainspring Energy develops power generation systems. The company focuses on technology for utility and data center customers.
Deep TechEnergyHardware
Founders & leadership
SM
Shannon MillerinCo-Founder and President
Board
TL
Tom LinebargerChairman & Chief Executive Officer
Investors · 14
Khosla Ventures✓ verifiedMenlo Park · $5K – $50M
ClearSkyWest Palm Beach
DCVC (Data Collective)Palo Alto · $5M – $25M
Fine Structures VenturesCambridge
Marunouchi Innovation PartnersTokyo
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General Catalystreported · 2 sourcesSan Francisco · $30M
Pictet GroupreportedGeneva
Temasekreported · 2 sourcesSingapore
Also in the syndicate · 6
Amazon’s Climate Pledge FundGates FrontierKhoslaLGT BankLightrockM&G Investments
Funding
SEC filings, press & company announcements- Undisclosed amountSeries FApr 2025
General Catalyst (lead), Amazon’s Climate Pledge Fund, DCVC, Gates Frontier, Khosla Ventures, LGT Bank, Lightrock, M&G Investments, Marunouchi Innovation Partners, Pictet Group, Temasek
Source ↗
Source: company announcements and press reports — follow each round's link for the claim.
Competitors · 1
by search overlapCompanies competing with Mainspring Energy for the same Google search keywords, organic and paid, via search-intersection analysis.
In the news
How Mainspring Energy Turns Fuel Into Power Without Combustion | Inevitable podcast — MCJmcj.vc · Jul 2026Frequently asked questions
- What does Mainspring Energy do?
- Mainspring Energy develops power generation systems. The company focuses on technology for utility and data center customers.
- Who founded Mainspring Energy?
- Mainspring Energy was founded by Shannon Miller.
- Who are Mainspring Energy's investors?
- Mainspring Energy's investors include Khosla Ventures, ClearSky, DCVC (Data Collective), Fine Structures Ventures, Marunouchi Innovation Partners, General Catalyst, Pictet Group, Temasek.