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Stellaria

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STELLARIA provides is a new nuclear energy solutions for centuries

Grenoble, FranceFounded 2023Energy
Valuation $100–250M Last recorded · 2025
Headcount <100 Current team size
Total funding $10–50M Disclosed equity funding
Unlock exact values This page shows ranges. Dealroom has the exact numbers for Stellaria and the history behind them.

About Stellaria

Stellaria Energy is a pioneering company in the nuclear energy sector, focusing on the development and deployment of Small Modular Reactors (SMRs) with a capacity of 100MWe. These reactors are designed to be safe, efficient, and environmentally friendly, featuring a 'safe by design' approach that eliminates the risk of catastrophic failures like Fukushima. The company leverages molten salt technology, which offers a compact and high-density energy storage solution, making it a viable alternative to traditional coal and lithium-ion batteries. Stellaria Energy's SMRs are capable of stabilizing power levels rapidly, making them ideal for complementing renewable energy sources and handling the fast-changing loads of industrial facilities. The reactors also have the unique ability to regenerate their own fuel and burn old nuclear waste, contributing to a sustainable and long-term energy solution. Stellaria Energy serves a diverse range of clients, including industrial facilities and energy providers, operating in the high-value segment of peak load power production. The company's business model revolves around the sale and maintenance of these advanced reactors, generating revenue through long-term contracts and service agreements. Keywords: Nuclear energy, SMR, molten salt technology, CO2 net zero, intrinsic safety, energy storage, renewable complement, fuel regeneration, industrial power, peak load production.

Source: Dealroom company data

At a glance

Status
Operational
Founded
2023
Headquarters
Grenoble, France
Employees
29
Open positions
None listed
Dealroom signal
89.3/100
Sub-industry
Clean Energy
Sector
Energy, Spinout, Sustainable Development Goals, Nuclear Fission, Climate Tech, Novel Energy, Energy and Greentech, Observatoire Deeptech, Greentech, NIF defense security and resilience
Technology
Hardware, Deep Tech
Business model
Manufacturing
Client focus
b2b

Funding history

4 recorded events

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
GRANT✓Other financing Jul 2025 $11M — France 2030 ↗
EARLY VC✓Equity / VC Jul 2025 $25M $101M CEA Investissement · Audacia · Supernova Invest · At One Ventures ↗
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Growth signals

Stellaria website traffic

Latest recorded traffic for Stellaria is 1.5K monthly website visits, up 25% over the last three months. Stellaria's team grew 70.6% over the past year.

Latest monthly visits1.5K 3-month web change+25% 1-year team growth+70.6%
Summary metrics are public; monthly history is available with a demoCompare with peers →

Similar companies

Closest operating peers by Dealroom taxonomy

Company identity and context are open; selected comparison metrics preview what is available on the platform.

Showing 8 of the closest matchesCompare every metric →

Investments and acquisitions

Capital deployed

Recent portfolio relationships for companies that also act as investors or acquirers.

Investors

9 investors on the cap table

From Dealroom's funding and investor records, grouped by the round each investor first entered.

Seed6 investors entered at this stage

  • Technip Energies
  • CEA Investissement
  • Audacia
  • Schneider Electric
  • Supernova Invest
  • France 2030

Series A2 investors entered at this stage

  • At One Ventures
  • Exergon

Other known investors1 additional known investor

  • French Alternative Energies and Atomic Energy Commission - CEA
Team profiled 1 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 1 quality Hidden — book a demo/100
Potential founders Hidden — book a demo likely future founders
Startup mafia Hidden — book a demo alumni-founded startups
Talent movements Hidden — book a demo in · Hidden — book a demo out past 12 months

Source: Dealroom Talent Intelligence.

Global footprint

Workforce and web traffic by country
Workforce by country
2 countries with
team presence
🇫🇷 France95.8%
🇺🇸 United States4.2%
2 countries shown

Market sentiment

Posts on X, past 7 days

An AI-synthesised read of the highest-engagement posts about Stellaria on X, ranked by likes and reposts, corporate channels excluded.

Reading the room on X — pulling top posts and synthesizing themes…

Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour

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