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Avalanche’s desktop fusion reactor delivers blistering-hot plasma

TechCrunch · Jun 10, 2026, 12:15 PM · Also reported by 1 other source

Key takeaways

  • No one has made a fusion reactor capable of generating power, but physicists have a pretty good road map for how to get there.
  • Avalanche exclusively told Tech Crunch that its desktop-scale fusion prototype has exceeded the milestone, heating a plasma to roughly 11 million degrees C.
  • Most fusion startups burned through more cash to get there, too.

No one has made a fusion reactor capable of generating power, but physicists have a pretty good road map for how to get there. One major milestone is heating fusion fuel up above 10 million degrees Celsius — nearly as hot as the center of the Sun.

Avalanche exclusively told Tech Crunch that its desktop-scale fusion prototype has exceeded the milestone, heating a plasma to roughly 11 million degrees C. Only a handful of companies have accomplished the feat.

Most fusion startups burned through more cash to get there, too. Avalanche said it had spent less than $50 million of venture investment to hit the mark.

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