About Mainspring Energy
Mainspring Energy is an Energy & Utilities company based in Menlo Park (United States) founded in 2010 by Matt Svrcek, Adam Simpson, and Shannon Miller. It operates as an onsite linear power generators are developed for multiple customer sectors. Mainspring Energy has raised $739.4 million across 5 funding rounds from investors including Shell, Chevron and Khosla Ventures. The company has 114 employees. Its chief executive is Shannon Miller. Mainspring Energy offers products and services including Linear Generator and Energy Solutions. Its focus areas include Energy Tech, Renewable Energy Tech, Bioenergy and Applications. Its legal entity is Mainspring Energy, Inc. Its competitors include Natural Fire.
Company details
Mainspring Energy was founded in 2010 and is headquartered in Menlo Park, United States. Onsite linear power generators are produced by the company, designed to operate on various fuels. These generators serve commercial, industrial, microgrid, and utility applications. Operations focus on the energy sector, providing reliable power solutions across diverse end-users in the domestic market.
- Headquarters Menlo Park, United States
- Employees 114
- Founders Matt Svrcek, Adam Simpson, Shannon Miller
- SectorsEnergy & Utilities
- Email••••••••
- Website mainspringenergy.com
- Social LinkedIn X
- Legal Name Mainspring Energy, Inc.
- Annual Revenue$167.69 K (USD)346as on Dec 31, 2023
- Net Profit$56.14 K (USD)184as on Dec 31, 2023
- Total Equity Funding$739.4M (USD)
in 5 rounds
- Latest Funding Round$258M (USD), Series F
Apr 2025
- InvestorsShell
& 26 more
- Employee Count114
Products & Services of Mainspring Energy
Mainspring Energy offers a comprehensive portfolio of products and services, including Linear Generator and Energy Solutions.
Provides efficient power for capacity and resilience needs
Delivers systems for commercial and biogas applications
Funding Insights of Mainspring Energy
Mainspring Energy has successfully raised a total of $739.4M across 5 strategic funding rounds. The most recent funding activity was a Series F round of $258 million completed in April 2025. This substantial capital infusion reflects strong investor confidence in the company's business model, growth potential, and market opportunities. The funding enables strategic expansion, product development, market penetration, and operational scaling to drive long-term value creation and competitive advantage.
- Total Funding $739.4M
- Total Rounds 5
- Last Round Series F — $258M
- First Round $83.3M
(Aug 2017)
- Investors Count 27
All 5 funding rounds of Mainspring Energy with amounts and investors; the two latest post-money valuations are shown, the rest are part of the premium plan.
| Date | Amount | Transaction Name | Valuation | Lead Investors | Investors |
|---|---|---|---|---|---|
| Apr 2025 | $258M | Series F | – | General Catalyst | |
| Sep 2022 | $140M | Series E | – | Lightrock | |
| May 2022 | $150M | Series E | – | Lightrock | |
| Dec 2020 | $108.1M | Series D | – | – | |
| Aug 2017 | $83.3M | Series C | – | American Electric Power, Centrica |
27 investors in total: 25 institutional and 2 angel.
Investors in Mainspring Energy
Mainspring Energy has secured backing from 27 investors, including venture fund, institutional, and angel investors. Prominent investors backing the company include Shell, Chevron and Khosla Ventures.
| Investor | Description | Founded Year | Domain | Location |
|---|---|---|---|---|
Investment and transformation services for entrepreneurs in technology and finance sectors. | – | generalcatalyst.com | - | |
Venture capital firm focused on multiple sectors | – | dcvc.com | Palo Alto, United States | |
An investment platform is provided for diverse sectors and geographies. | 1974 | temasek.com.sg | Singapore, Singapore | |
Growth investments are made in climate tech startups globally. | – | marunouchi-innovation.com | Tokyo, Japan | |
Diversified asset management firm and private fund focused on debt and equity investments in climate startups, real estate, and multiple sectors | 1931 | mandg.com | London, United Kingdom | |
A global initiative focused on net-zero carbon emissions by 2040 through company commitments. | – | theclimatepledge.com | - | |
Investments are directed toward growth-stage companies generating scalable impact. | 2009 | lightrock.com | London, United Kingdom | |
Early-stage startups are funded by this venture capital firm. | 2004 | khoslaventures.com | Menlo Park, United States | |
- | – | gatesfrontier.tcc.mode | - | |
Tech companies are funded through venture capital by Princeville Capital. | – | princeville-capital.com | San Francisco, United States |
Investor details for Mainspring Energy
The complete investor list, round-by-round participation and investor portfolios require an active premium plan.
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People of Mainspring Energy
28 people are tracked at Mainspring Energy (20 in leadership, 8 in team); the tracked headcount is 114.
| Name | Role | Group |
|---|---|---|
Matt Svrcek | Co-Founder & CTO | Leadership |
Adam Simpson | Co-Founder & CCO | Leadership |
Shannon Miller | Co-Founder & CEO | Leadership |
Kelly Yee | Director Of Public Partnerships | Leadership |
Stephen Figueroa | Sr. Director Of Business Development | Leadership |
Kent Leacock | Sr Director Public Affairs | Leadership |
Michael Shepherd | Director - Data Center Business Development | Leadership |
Maria Amundson | Chief Communications Officer | Leadership |
Craig Litherland | Head Of Intellectual Property | Leadership |
Michelle Yun | Director, Senior Counsel | Leadership |
Quentin Notte | Head Of Growth | Leadership |
Robert Stalnaker | Head Of Energy Infrastructure Sales | Leadership |
Michael Mushaty | Sr. Director Of Sales | Leadership |
Whitney Bartlett | Senior Human Resources Business Partner | Leadership |
Gregory Pal | Vice President, Product | Leadership |
Ashleigh Nguyen | Vice President, People Operations | Leadership |
Matt Shumway | Director Of Business Development | Leadership |
Chris Ball | Head Of Product Marketing | Leadership |
Brent Ness | Sr. Director - Data Center Business Development | Leadership |
Joseph Ferrari | Director, Utility Development | Leadership |
8 more people are available in the full profile.
Complete people profiles for Mainspring Energy
Full employee and board profiles, team structure, tenure and professional contact details require an active premium plan.
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Timeline of Mainspring Energy
3 dated milestones of Mainspring Energy across 15 years, from founding to its latest funding, stage changes and deals.
- Founded Mainspring Energy is founded.
- Funding First funding round of $83.3M.
- Funding Latest funding round, Series F, of $258.0M.
Competitors of Mainspring Energy
Mainspring Energy has 1 listed competitor in our database. They include Natural Fire, among others.
| Company Name | Domain | Founded | HQ Location | Total funding | Employees | Description |
|---|---|---|---|---|---|---|
| naturalfire.es | 2011 | Yecla, Spain | – | – | Biomass machinery is manufactured for industrial fire and energy needs. |
Detailed competitors of Mainspring Energy
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Web traffic of Mainspring Energy
The website of Mainspring Energy (mainspringenergy.com) receives about 6.7K visits a month.
- Monthly visits6.7K
▼ 16.7% vs previous month
Websites whose visitors overlap most with Mainspring Energy. Affinity shows how closely the audiences match.
| Website | Domain | Audience affinity | Monthly visits | Global rank | Profile |
|---|---|---|---|---|---|
| memoryblue.com | 100% | 32.1K | – | View details | |
| gomainspring.com | 53% | – | #6,146,366 | View details |
Top companies in Renewable Energy Platforms
10 companies that operate in the same segment as Mainspring Energy (Renewable Energy Platforms), ranked by their profile score on The Company Check.
| Company | Description | Founded | Location | Total funding | Revenue | Employees |
|---|---|---|---|---|---|---|
Silicon-based solar PV modules are manufactured for diverse applications. | 1985 | San Jose, California, United States | USD 171.73 M | USD 300 M | 600 | |
Manufacturer of smart solar inverters | 2006 | Herzliya, Central District, Israel | USD 96.8 M | USD 1.18 B | 5,630 | |
Solar panel tracking software is provided for monitoring and control. | 2013 | Fremont, California, United States | USD 42.63 M | USD 3.56 B | 1,300 | |
Provider of climate-smart deeptech solutions for renewable energy and sustainable agriculture | 2010 | Pune, Maharashtra, India | USD 76.38 M | USD 56.11 M | 702 | |
Iron-air energy storage systems are developed for renewable energy projects. | 2009 | Somerville, Massachusetts, United States | USD 1.88 B | – | – | |
Full-end solar services are provided to residential and commercial sectors. | 2009 | Charleston, South Carolina, United States | USD 670.36 M | – | – | |
Micro-inverters and energy storage systems are manufactured for solar applications. | 2006 | Fremont, California, United States | USD 100.07 M | USD 1.47 B | 2,780 | |
Producer and supplier of green hydrogen | 2017 | Nantes, Pays De La Loire, France | USD 96.93 M | USD 11.48 M | 199 | |
Online platform for funding solar projects | 2015 | New York, New York, United States | USD 503.95 M | – | 30 | |
Provider of hydrogen production and storage solutions | 1927 | Oslo, Oslo, Norway | – | USD 95.55 M | 409 |
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Related news about Mainspring Energy
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Frequently Asked Questions about Mainspring Energy
Mainspring Energy was founded in 2010 and raised its 1st funding round 7 years after it was founded.
Mainspring Energy is headquartered in Menlo Park, United States. It is registered at Menlo Park, California, United States.
Shannon Miller is the current CEO of Mainspring Energy. They have also founded this company.
Mainspring Energy is a funded company, having raised a total of $739.4M across 5 funding rounds to date. The company's 1st funding round was a Series C of $83.3M, raised on Aug 2017.
Mainspring Energy has 114 employees.
Annual revenue of Mainspring Energy is $167.69K as on Dec 31, 2023.
Mainspring Energy was founded in 2010 and is headquartered in Menlo Park, United States. Onsite linear power generators are produced by the company, designed to operate on various fuels. These generators serve commercial, industrial, microgrid, and utility applications. Operations focus on the energy sector, providing reliable power solutions across diverse end-users in the domestic market.
Mainspring Energy's top competitors include Natural Fire.
Mainspring Energy offers Linear Generator and Energy Solutions.
Mainspring Energy has 27 investors. Key investors include Shell, Chevron, Khosla Ventures, Equinor, and American Electric Power.
Mainspring Energy operates through Mainspring Energy, Inc..