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Calogena

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Carbon-free heat generation using small modular nuclear reactors for efficient and safe energy solutions

Aix-en-Provence, FranceFounded 2021Energy
Valuation $250–500M Last recorded · 2026
Headcount <100 Current team size
Total funding $100–500M Disclosed equity funding
Unlock exact values This page shows ranges. Dealroom has the exact numbers for Calogena and the history behind them.

About Calogena

Calogena is pioneering a carbon-free heating solution through the development of Small Modular Reactors (SMRs), specifically designed as small water nuclear boilers. These reactors are based on well-established and proven technologies, offering a compact, safe, and simple design. Operating at low pressure and temperature, Calogena's SMRs provide direct use of the heat produced, minimizing the need for auxiliary systems and enhancing safety and simplicity compared to traditional reactors. The company's solution addresses the high CO2 emissions associated with conventional heat production methods, such as gas-fired boilers and coal-fired power stations, which are significant contributors to global greenhouse gas emissions. By leveraging nuclear energy, Calogena's modules achieve a carbon footprint of approximately 6g of CO2 per kWh of electricity, significantly lower than traditional methods. Each module is capable of generating 30 MW of thermal power, sufficient to power 12,000 households, making it a viable option for reducing the environmental impact of heating, an energy-intensive sector responsible for 50% of energy consumption in Europe. Calogena's business model focuses on providing a sustainable and efficient alternative to fossil fuel-based heating, targeting markets with high energy demands and environmental concerns. The company generates revenue by offering these advanced nuclear heating solutions to clients seeking to reduce their carbon footprint and enhance energy efficiency.

Source: Dealroom company data

At a glance

Status
Operational
Founded
2021
Headquarters
Aix-en-Provence, France
Employees
56
Open positions
3
Dealroom signal
56.5/100
Industry
Energy
Sector
Energy, Sustainable Development Goals, Nuclear Fission, Climate Tech, radar de l'innovation, slush24, observatoire greentech, observatoire industrial tech
Business model
Manufacturing
Client focus
b2b

Funding history

2 recorded events

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
GRANTOther financing Mar 2026 $53M — France 2030 ↗
EARLY VCOther financing Mar 2026 $57M $229M Banque des Territoires · Groupe Snef · Gorgé SA ↗
Showing the latest 2 of 2 recorded eventsBook a demo for the full funding history →

Growth signals

Calogena website traffic

Latest recorded traffic for Calogena is 2.3K monthly website visits, down 47.7% over the last three months. Calogena's team grew 133.3% over the past year.

Latest monthly visits2.3K 3-month web change-47.7% 1-year team growth+133.3%
Summary metrics are public; monthly history is available with a demoCompare with peers →

Investments and acquisitions

Capital deployed

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

Investors

4 investors on the cap table

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

Seed1 investor entered at this stage

  • France 2030

Series A3 investors entered at this stage

  • Banque des Territoires
  • Groupe Snef
  • Gorgé SA
Employees 56 total headcount
Founders Hidden — book a demo/100 quality score
Key operators Hidden — book a demo quality score
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
🇫🇷 France95.5%
🇫🇮 Finland4.5%
2 countries shown

Market sentiment

Posts on X, past 7 days

An AI-synthesised read of the highest-engagement posts about Calogena 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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