El Segundo, California, United StatesFounded 2019207+ employeesPrivate
$518.8M raisedGrowth· last: series d (Feb 2026)· 6 rounds
Backed by(41 investors)
Lockheed Martin Ventures · LeadAndreessen Horowitz · LeadBoost VC · LeadDCVC · LeadDraper Associates · LeadUnion Square Ventures · Lead+10 more
Radiant is a clean energy startup building a nuclear microreactor. A climate-friendly alternative to diesel generators, Radiant's Kaleidos 1MW microreactor will be the world's first portable, zero-emissions power source that works anywhere. We plan to test our development reactor by 2026 and if successful, it will be the first new commercial reactor design to achieve a fueled test in over 50 years. Our microreactor can bring power to remote parts of the world and provide backup power for life-saving applications in hospitals or disaster-relief scenarios.
Founders
Open Positions at Radiant (65 Jobs)
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