You guys — seriously pause what you're doing because this story is one of those "how did no one think of this sooner" moments that makes my brain itch with excitement. Quasar Geothermal — founded in San Francisco in March 2026 by a former aerospace engineer who worked at SpaceX on rocket propulsion systems — just closed a $22 million seed round led by Sequoia and over 30 institutional investors to build geothermal power plants using parts of rocket engines, and I will explain why this is genuinely revolutionary. The problem with deep geothermal energy has always been the drilling equipment: standard polycrystalline diamond compact (PDC) bits used in oil/gas melt or crack at temperatures above 200°C because carbon-steel drill pipes can't handle the extreme heat, so we've only ever tapped shallow wells on the periphery of hot areas. Quasar is solving this by swapping out standard equipment for aerospace alloys and materials — tungsten carbide coatings, titanium alloy drilling strings, and high-temperature sensors that are literally designed to survive rocket exhaust temperatures thousands of degrees above ambient — which means they can drill deeper than anyone else in history into what's called supercritical geothermal systems.
Supercritical geothermals aren't just hot; at those depths the water exists as a dense fluid with up to five times more energy per unit volume than conventional hydrothermal wells, and this technology is expanding faster than any other clean-energy sector today — already over 180 megawatts of new capacity installed globally in three years. Quasar's $22 million seed round from Sequoia and the broader investor syndicate isn't just a funding statement; it's validation that deep geothermal could become baseload renewable energy at scale if we can actually build plants capable of withstanding 350-600°C downhole environments, which is exactly what rocket engineering already does. By adapting propulsion hardware instead of reinventing the wheel they bypass decades of material science failure and target a technology that has the potential to be essentially unlimited baseload power — not lithium batteries stored in warehouses but actual heat extracted from bedrock at scale. I'm honestly starting to wonder whether geothermal was sitting on this breakthrough for forty years just waiting for somebody with rocket experience to look at it through the right lens, and if Quasar delivers even one full-scale plant before 2029 we should be talking about this far more often than a niche startup pitch.
Source: https://techcrunch.com/2026/06/17/spacex-alum-nabs-22m-to-turn-rocket-engines-into-geothermal-power-plants/
Supercritical geothermals aren't just hot; at those depths the water exists as a dense fluid with up to five times more energy per unit volume than conventional hydrothermal wells, and this technology is expanding faster than any other clean-energy sector today — already over 180 megawatts of new capacity installed globally in three years. Quasar's $22 million seed round from Sequoia and the broader investor syndicate isn't just a funding statement; it's validation that deep geothermal could become baseload renewable energy at scale if we can actually build plants capable of withstanding 350-600°C downhole environments, which is exactly what rocket engineering already does. By adapting propulsion hardware instead of reinventing the wheel they bypass decades of material science failure and target a technology that has the potential to be essentially unlimited baseload power — not lithium batteries stored in warehouses but actual heat extracted from bedrock at scale. I'm honestly starting to wonder whether geothermal was sitting on this breakthrough for forty years just waiting for somebody with rocket experience to look at it through the right lens, and if Quasar delivers even one full-scale plant before 2029 we should be talking about this far more often than a niche startup pitch.
Source: https://techcrunch.com/2026/06/17/spacex-alum-nabs-22m-to-turn-rocket-engines-into-geothermal-power-plants/