X-energy
Delivering the next generation of advanced nuclear energy technology.
1773 employees · est. 2009 · Rockville, United States
X-energy is the older company (2019 vs 2009); X-energy is the larger of the two.
Side-by-Side Comparison
| Metric | TRANSMUTEX | X-energy |
|---|---|---|
| Founded | ||
| Founded | 2019 | 2009 older |
| Headquarters | ||
| Headquarters | Vernier, Switzerland | Rockville, United States |
| Employees | ||
| Employees | 59 | 1773 larger |
| Industry | ||
| Industry | Energy, Renewable Energy | Energy, Renewable Energy, Clean Energy |
| Funding Stage | ||
| Funding Stage | Series A | Series C 1 |
| Total Funding | ||
| Total Funding | $40.09M | $2.78B |
| Funding Rounds | ||
| Funding Rounds | 6 | 12 |
| Services | ||
| Services | Energy Generation, Nuclear Waste Reduction, Radioisotope Production | Not tracked yet |
| Target Customers | ||
| Target Customers | Healthcare Industry, Energy Sector, Waste Management Facilities, Research Institutions | Not tracked yet |
| Taxonomy | ||
| Taxonomy | Nuclear Energy, Particle Accelerators, Transmutation, Carbon-free Energy, Sustainable Energy, Nuclear Waste Reduction, Energy Innovation, Safety In Nuclear, Climate Change Solutions, CERN Technology, PSI Technology, Environmental Technology, Energy Research, Industrial-scale Energy, Nuclear Proliferation Prevention | Advanced Nuclear Energy, Carbon-free Energy, Nuclear Power Innovation, Clean Energy Technology, Nuclear Fuel Manufacturing, Meltdown Prevention, Waste Management, Nuclear Plant Design, Baseload Power Generation, Safety Innovations, Affordable Energy, Renewable Energy Alternative, Sustainable Energy Solutions |
| Website | ||
| Website | transmutex.com | x-energy.com |
About TRANSMUTEX
TRANSMUTEX, a Swiss-based company founded in 2019, is at the forefront of redefining the nuclear energy landscape. With the slogan "Reinventing Nuclear," the company focuses on solving critical challenges of cost, safety, and proliferation that traditionally beset nuclear reactors. Their cutting-ed...
About X-energy
X-energy, founded in 2009, is at the forefront of revolutionizing the energy landscape with its cutting-edge advanced nuclear technology. The company's mission, encapsulated in its slogan "Delivering the next generation of advanced nuclear energy technology," aims to contribute to a carbon-free futu...
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Compiled from the BounceWatch company index. We last looked at TRANSMUTEX on 13 Nov 2025, and X-energy on 12 Sep 2024. Where a field is blank here, it means we have not recorded it — not that the answer is zero. How we source and date this.