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Fourth Power vs Malta Inc

Fourth Power logo

Fourth Power

Energy Storage that Grows with the Grid

35 employees · est. 2021 · Cambridge, United States

VS
Malta Inc logo

Malta Inc

Transforming the Future of Energy Storage

480 employees · est. 2018 · Cambridge, United States

Malta Inc is the older company (2021 vs 2018); Malta Inc is the larger of the two.

Side-by-Side Comparison

Fourth Power Malta Inc
Founded
2021 2018 older
Headquarters
Cambridge, United States Cambridge, United States
Employees
35 480 larger
Industry
Energy, Renewable Energy, Energy Storage Energy, Renewable Energy
Funding Stage
Series A Not tracked yet
Total Funding
$19.00M $86.00M
Funding Rounds
1 5
Services
Thermal energy storage systems, Utility-scale energy solutions, Flexible grid-scale storage solutions Utility-scale energy storage systems, Long-duration storage solutions, Steam-based heat pump technology, Integration with existing fossil assets, Dispatchable and cost-effective energy delivery
Target Customers
Utility companies, Energy infrastructure developers, Renewable energy sectors, Government energy agencies Energy Utilities, Industrial Power Providers, Data Centers, Infrastructure Operators, Renewable Energy Companies
Taxonomy
Thermal BatteryEnergy StorageGrid StorageThermal StorageUtility-Scale StorageLong-Duration Energy Storage +8 Thermo-electric Energy StorageSteam Energy Management And Storage (SEMS)Heat Pump TechnologyMolten Salt StorageLong-duration Energy StorageGrid-scale Energy Solutions +7
Website
gofourth.com maltainc.com
Fourth Power logo

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...

Malta Inc logo

About Malta Inc

Malta Inc, founded in 2018, is setting transformative benchmarks in the Energy and Renewable Energy industries. Headquartered in the United States, the company is advancing how we store energy with its revolutionary thermo-electric energy storage system. Under the slogan, "Transforming the Future of...

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Frequently Asked Questions

Fourth Power was founded in 2021, based in Cambridge, United States, with 35 employees. 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 transform. Malta Inc was founded in 2018, based in Cambridge, United States, with 480 employees. Malta Inc, founded in 2018, is setting transformative benchmarks in the Energy and Renewable Energy industries. Headquartered in the United States, the company is advancing how we store energy with it.
Fourth Power has raised $19.00M and Malta Inc $86.00M. Latest stage: Fourth Power Series A.
Both work in Energy and Renewable Energy and list long-duration energy storage among their focus areas.

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Compiled from the BounceWatch company index. We last looked at Fourth Power on 18 Aug 2025, and Malta Inc on 7 Apr 2026. 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.

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