Insights

Scale Capacity Mainspring is expanding with a 300,000-square-foot clean-tech manufacturing facility in Pittsburgh and hiring aggressively, backed by significant funding. This scale enables large, rapid deployments and regionally sourced production for utilities, data centers, and industrial customers, reducing lead times and supply chain risk.

Hydrogen Pathways A partnership with Verdagy to deploy a hydrogen-powered linear generator in Moss Landing signals a clear path to hydrogen-ready generation. This creates opportunities to pitch integrated hydrogen-backed microgrids and collaborations with electrolyzers and clean energy ecosystems to utilities and heavy industries seeking decarbonized backup power.

Target Markets Mainspring serves utilities, data centers, enterprises, and industrials with flexible, low-emission generation. Sales opportunities include turnkey on-site power for microgrids, resilient back-up for data centers, and scalable solutions for capacity-constrained facilities, with potential for bundled monitoring and optimization services.

Financing Levers With a $258 million Series F and substantial manufacturing investments, there is strong momentum for flexible financing options. Offer project financing, leases, and O&M revenue models to shorten purchase cycles and accelerate deployments for large-scale customers and EPC partnerships.

Regional Footprint The Pennsylvania and East Coast expansion supports regional deployments and local service capability. Emphasize near-site manufacturing, spare parts, and rapid response for Eastern customers, leveraging local job creation to bolster regional credibility and contract opportunities.

Mainspring Energy Tech Stack

Mainspring Energy uses 8 technology products and services including Ansible, Inductive Automation, 6sense, and more. Explore Mainspring Energy's tech stack below.

  • Ansible
    Configuration Management
  • Inductive Automation
    Database Management Software
  • 6sense
    Marketing Automation
  • HTTP/2
    Miscellaneous
  • Linux kernel
    Operating Systems
  • Lever
    Recruitment Marketing
  • Google
    Search Engines
  • Tailwind CSS
    UI Frameworks

Media & News

Mainspring Energy's Email Address Formats

Mainspring Energy uses at least 2 format(s):
Mainspring Energy Email FormatsExamplePercentage
First.Last@etagen.comJohn.Doe@etagen.com
100%
First.Last@mainspringenergy.comJohn.Doe@mainspringenergy.com
96%
Last@mainspringenergy.comDoe@mainspringenergy.com
3%
First@mainspringenergy.comJohn@mainspringenergy.com
1%

Frequently Asked Questions

What is Mainspring Energy's phone number?

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You can contact Mainspring Energy's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Mainspring Energy's official website and social media links?

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Mainspring Energy's official website is mainspringenergy.com and has social profiles on LinkedInCrunchbase.

What is Mainspring Energy's NAICS code?

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Mainspring Energy's NAICS code is 22111 - Electric Power Generation.

How many employees does Mainspring Energy have currently?

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As of July 2026, Mainspring Energy has approximately 517 employees across 4 continents, including North AmericaAsiaEurope. Key team members include Vice President Engineering: D. U.Head Of Brand Marketing: T. R.Head Of Project Delivery: B. H.. Explore Mainspring Energy's employee directory with LeadIQ.

What industry does Mainspring Energy belong to?

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Mainspring Energy operates in the Electric Power Generation industry.

What technology does Mainspring Energy use?

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Mainspring Energy's tech stack includes AnsibleInductive Automation6senseHTTP/2Linux kernelLeverGoogleTailwind CSS.

What is Mainspring Energy's email format?

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Mainspring Energy's email format typically follows the pattern of First.Last@etagen.com. Find more Mainspring Energy email formats with LeadIQ.

How much funding has Mainspring Energy raised to date?

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As of July 2026, Mainspring Energy has raised $813M in funding. The last funding round occurred on Apr 14, 2025 for $258M.

When was Mainspring Energy founded?

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Mainspring Energy was founded in 2010.
Mainspring Energy logo

Mainspring Energy

Electric Power GenerationCalifornia, United States501-1000 Employees

Mainspring Energy is a power generation company based in Menlo Park, California, that designs and manufactures linear generators for local power delivery to capacity-constrained facilities and communities. Its products are used by utilities, data centers, enterprise customers, and industrial sectors. The company employs between 501 and 1,000 people and is headquartered at 3601 Haven Avenue, Menlo Park, CA 94025. In 2025 it expanded its manufacturing footprint with a 300,000-square-foot facility investment in Pittsburgh, Pennsylvania. Also in 2025, Mainspring Energy completed a Series F financing round led by General Catalyst.

Section iconCompany Overview

Phone number
NAICS Code
22111 - Electric Power Generation
Founded
2010
Employees
501-1000

Section iconFunding & Financials

  • $813M

    Mainspring Energy has raised a total of $813M of funding over 8 rounds. Their latest funding round was raised on Apr 14, 2025 in the amount of $258Mas a series_f.

  • $100M$250M

    Mainspring Energy's revenue is estimated to be in the range of $100M$250M

Section iconFunding & Financials

  • $813M

    Mainspring Energy has raised a total of $813M of funding over 8 rounds. Their latest funding round was raised on Apr 14, 2025 in the amount of $258Mas a series_f.

  • $100M$250M

    Mainspring Energy's revenue is estimated to be in the range of $100M$250M

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