Fourth Power vs Williams Companies
Side-by-side comparison of AI visibility scores, market position, and capabilities
Raised $45M total including $20M Series A (Munich Re Ventures, DCVC, Breakthrough Energy). Integrated demo unit completing 2026. Targets 10x cheaper storage than lithium-ion.
About
Fourth Power is an MIT-originated thermal energy storage company that stores electricity as heat in graphite blocks at 2,400°C — using molten tin as a heat transfer medium and converting stored heat back to electricity via thermophotovoltaics (TPV). The company has raised $45 million including a $20 million Series A from Munich Re Ventures, DCVC, and Breakthrough Energy Ventures, and is completing its full integrated demonstration unit in 2026.
Williams Companies (WMB) reported ~$10.7B revenue in FY2024. Major natural gas pipeline and processing company, transporting 30% of all U.S. natural gas through its Transco pipeline. HQ: Tulsa, OK.
About
The Williams Companies, Inc. is one of the largest natural gas infrastructure companies in the United States, owning and operating approximately 33,000 miles of pipelines, 38 processing facilities, and 24 storage facilities that move roughly 30% of all U.S. natural gas consumption. Its crown jewel is Transco — the nation's largest interstate natural gas pipeline system, stretching 1,800 miles from the Gulf of Mexico to New York City and transporting gas to the heavily populated and gas-dependent Northeast.
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