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Mainspring Energy
Mainspring Energy, Inc. is a power infrastructure company headquartered in Menlo Park, California. The company develops and delivers clean, flexible, and local power generation solutions designed to help commercial and industrial customers meet their energy needs.
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Mainspring Energy at a glance
Mainspring Energy is an energy company headquartered in United States. It has raised at least $493.1M across the 3 funding rounds on record. Its most recent funding round raised $290M in September 2022. Xcout tracks 1 named person at Mainspring Energy, including Tom Linebarger (Chairman and CEO). Xcout recorded 112 job postings from Mainspring Energy in the last 90 days.
Mainspring Energy leadership
- Tom LinebargerChairman and CEO
Mainspring Energy funding rounds
At least $493.1M raised across the 3 rounds on record. Every round on record:
| Date | Round | Amount | Investors |
|---|---|---|---|
| — | $290M | 12 named | |
| — | $95M | 11 named | |
| SEC Form D filing | $108.1M | — |
Who invested in each round, lead investors, valuations and the co-investor graph — open the full funding history →
Hiring at Mainspring Energy
Xcout recorded 112 job postings from Mainspring Energy in the last 90 days, from a hiring record Xcout has kept since July 2026.
The weekly hiring trend, the roles and locations behind it — see Mainspring Energy's hiring signals →
Hiring vs the trend
Based on 52 job postings in the last 8 weeks (10 Aug – 4 Oct 2026), compared with 21 energy companies.
This describes a hiring pattern — how often Mainspring Energy’s job postings ask for AI skills, and how that changed against the previous 8 weeks, ranked among its peers. It says nothing about the company’s products or performance.
Signed-in members see the AI-skill share and its change with peer percentiles, role mix, posting momentum and advertised US pay against the market.
Investors
Tech stack
Mainspring Energy competitors
A few of Mainspring Energy's closest competitors — see the full list of competitors and alternatives →
AutoGrid Systems is a software development company headquartered in Redwood City, California, providing internet-scale computing and flexibility management solutions to analyze energy data and support the clean energy transition.
Teragen Energy develops advanced, modular fuel cell systems designed to provide fast, reliable, affordable, and clean onsite power. The company serves essential industries such as AI data centers, manufacturing campuses, and utilities by offering rapid deployment, sub-second load-following, and built-in fuel flexibility.
Voltus, Inc. is a technology company that aggregates and manages distributed energy resources, such as commercial and industrial electricity loads, batteries, and generators. It helps businesses participate in demand-response and wholesale energy markets, serving commercial and industrial customers as well as utilities and grid operators.
e2Companies LLC provides energy reliability, resiliency, and virtual utility solutions for mid-sized to large organizations in industries such as data centers, manufacturing, and healthcare. The company installs its proprietary R3Di on-site power generation and battery storage systems, combined with Grove365 monitoring software, to help clients ensure continuous power, reduce peak charges, and lower carbon emissions.
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More on Mainspring Energy in Xcout Intel
- 1 named person with titles, LinkedIn and board committees
- 3 funding rounds with the investors in each, and who they co-invest with
- Weekly hiring history and the mix of roles behind it
- The full competitor set, tracking, exports and API access