Mainspring Energy Mainspring Energy (formerly known as EtaGen) is a technology company that provides clean energy solutions. | ![]() Tecogen Tecogen is a company that designs, manufactures, markets, installs, and maintains combined heat and power products. | ||
Founding Date | Founding Date 2010 | Founding Date 2000 | Founding Date 1995 |
Type | Type Private | Type Public | Type Public |
Tags | |||
Locations | Locations Menlo Park, US HQ | Locations North Billerica, US HQ Toronto, CA Portland, US Waltham, US | |
Employees | Employees 5011% increase | Employees 911% decrease | Employees 8,5006% decrease |
Valuation ($) | Valuation ($) N/A | Valuation ($) 21.4 m | Valuation ($) 1.9 b |
Financial | |||
Revenue (est.) | Revenue (est.) N/A | Revenue (est.) $27.1m (FY, 2025) | Revenue (est.) $3.7b (FY, 2025) |
Cost of goods | Cost of goods N/A | Cost of goods $17.2m (FY, 2025) | Cost of goods $3.2b (FY, 2025) |
Gross profit | Gross profit N/A | Gross profit $9.8m (FY, 2025) | Gross profit $423.8m (FY, 2025) |
Net income | Net income N/A | Net income ($8.2m) (FY, 2025) | Net income $118.4m (FY, 2025) |
Operating ⚠ | |||
Backlog | Backlog N/A | Backlog $6.7m (FY, 2022) | Backlog $2.4b (Q1, 2024) |
Remaining Performance Obligations | Remaining Performance Obligations N/A | Remaining Performance Obligations $1.5m (FY, 2022) | Remaining Performance Obligations $2.2b (Q1, 2024) |
Funding | |||
Total funding raised | Total funding raised $ 178m | Total funding raised N/A | Total funding raised $ 29.6m |

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