Fourth Power vs Noon Energy
Fourth Power
Energy Storage that Grows with the Grid
35 employees · est. 2021 · Cambridge, United States
Noon Energy
Compact long-duration energy storage, inspired by nature
73 employees · est. 2018 · Mountain View, United States
Noon Energy is the older company (2021 vs 2018); Noon Energy is the larger of the two.
Side-by-Side Comparison
| Metric | Fourth Power | Noon Energy |
|---|---|---|
| Founded | ||
| Founded | 2021 | 2018 older |
| Headquarters | ||
| Headquarters | Cambridge, United States | Mountain View, United States |
| Employees | ||
| Employees | 35 | 73 larger |
| Industry | ||
| Industry | Energy, Renewable Energy, Energy Storage | Energy, Renewable Energy, Energy Storage |
| Funding Stage | ||
| Funding Stage | Series A | Convertible Note |
| Total Funding | ||
| Total Funding | $19.00M | $31.22M |
| Funding Rounds | ||
| Funding Rounds | 1 | 5 |
| Services | ||
| Services | Thermal energy storage systems, Utility-scale energy solutions, Flexible grid-scale storage solutions | Development of ultra-long duration batteries, Provision of clean and reliable electricity, Energy storage systems with high energy density |
| Target Customers | ||
| Target Customers | Utility companies, Energy infrastructure developers, Renewable energy sectors, Government energy agencies | Data centers, Infrastructure requiring uninterrupted clean power, Operations seeking energy independence from fossil fuels, Industries with significant electrification needs |
| Taxonomy | ||
| Taxonomy | Thermal BatteryEnergy StorageGrid StorageThermal StorageUtility-Scale StorageLong-Duration Energy Storage +8 | Compact Energy StorageLong-duration StorageCarbon-oxygen ChemistryStationary BatteryPhotosynthesis-inspired TechnologyPrecious Metals Alternative +8 |
| Website | ||
| Website | gofourth.com | noon.energy |
About Fourth Power
Fourth Power is making significant strides in the energy sector with its innovative thermal battery technology. Founded in 2021 and headquartered in the United States, the company focuses on transforming renewable energy into an on-demand source via utility-scale thermal storage. These technological...
About Noon Energy
Noon Energy, based in Mountain View, United States, focuses on providing compact long-duration energy storage solutions inspired by nature. They cater to data centers, infrastructure requiring uninterrupted clean power, operations seeking energy independence from fossil fuels, and industries with si...
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Compiled from the BounceWatch company index. We last looked at Fourth Power on 18 Aug 2025, and Noon Energy on 18 Aug 2025. Where a field is blank here, it means we have not recorded it — not that the answer is zero. How we source and date this.
