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Stellaria
Founded 2023 · 31 employees on LinkedIn · 2 known investors
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Stellaria develops the Stellarium, a molten salt nuclear reactor designed for stable, passive operation with high thermal efficiency (over 45%) and enhanced safety through underground installation and multiple containment barriers. The reactor produces electricity or high-temperature heat for industrial applications including power generation for cities and manufacturing facilities.
Founders & leadership
Stellaria was founded in 2023 by Nicolas Breyton.
Investors · 2
How we know: At One Ventures's portfolio page · a partner's Signal profile · the VCSheet dataset · Not right? Tell us
How we know: the VCSheet dataset · Not right? Tell us
Funding
SEC filings, press & company announcements$6.8M disclosed across 1 of 2 rounds · 2026
Source: company announcements and press reports — follow each round's link for the claim.
Frequently asked questions
- What does Stellaria do?
- Stellaria develops the Stellarium, a molten salt nuclear reactor designed for stable, passive operation with high thermal efficiency (over 45%) and enhanced safety through underground installation and multiple containment barriers. The reactor produces electricity or high-temperature heat for industrial applications including power generation for cities and manufacturing facilities.
- Who founded Stellaria?
- Stellaria was founded by Nicolas Breyton in 2023.
- Who are Stellaria's investors?
- Stellaria's investors include At One Ventures, Supernova Invest.
- How much funding has Stellaria raised?
- Stellaria has disclosed $6.8M raised across 1 of its 2 known rounds.