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Avalanche Fusion
Last discussed Aug 15, 2026
An ambitious fusion startup based in Seattle aiming to build a fusion reactor compact enough to power a car or fit in a large backpack, representing the most aggressive compactness target in the fusion industry.
Recently discussed in
200GW Hiding in Grid, Sodium Batteries 10x Cheaper, Wave-Powered Datacenters w/ Ramez Naam | EP #280
Ramez Naam · Aug 15, 2026
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RN
Ramez Naam
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Used for: Ultra-compact fusion reactor for vehicles or portable power
Praised: Most ambitious compactness target; could revolutionize power cost and portabi...
vs: Compared to Commonwealth Fusion on a spectrum of de-risked science vs. revolu...
"The most audacious fusion startup that I know of is a company called Avalanche Fusion, also in the Seattle area, and they believe they can make a fusion reactor small enough to power a car. It's not Mr. Fusion, it's more like half the size of a ca..."
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