Fourth Power
Cambridge, United States · Founded 2023 · $40.4M raised
- Headquarters
- Cambridge, Massachusetts
- Employees
- 1–10
- Founded
- 2023
- Business Model
- B2B
- Website
- gofourth.com
- Total Funding
- $40.4M
- Last Round
- $20.0M Series BSep 2025
- Rounds
- 4
Totals include recorded grants and other qualifying funding, not just equity. What counts toward funding.
Indexed holds 4 funding rounds and 3 investors for this company. The full record is or through the API.
About
Develops utility-scale thermal energy storage using liquid metal and TPV to deliver low-cost, long-duration grid storage to utilities.
Summary
Fourth Power is a Clean Energy company based in Cambridge, United States, founded in 2023. It has raised $40.4M in total across 4 rounds, most recently a $20.0M Series B round in Sep 2025. Investors include DCVC (Data Collab), Munich Re Ventures and Breakthrough Energy Ventures.
Tech & App Stack
4 technologies & apps tracked
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Funding History
Sep 2025
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Funding: Grant through Series B. Amounts, valuations, and investors where available.
Investors
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