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Transmutex

Energy · Vernier, Switzerland · Founded 2019

Recycles nuclear waste to create carbon-free nuclear energy MoreLess

Transmutex is a pioneering startup that aims to revolutionize the civilian nuclear energy sector. The company's innovative technology focuses on producing nuclear energy that is not only safer and less expensive but also non-proliferant. This is achieved through a unique process that combines a particle accelerator with a nuclear fuel assembly to create a non-self-sustaining reaction. This reaction can be halted in less than 2 milliseconds, ensuring a high level of safety.

Transmutex's technology is highly adaptable, capable of using various fuels, including thorium, a metal as common as lead. This flexibility helps in addressing the world's increasing demand for carbon-free energy. The company has developed a range of hardware and software products that leverage this technology to provide carbon-free base load power, addressing the core issues of safety, cost, and proliferation risk that have traditionally hindered the global deployment of nuclear energy.

The company's subcritical systems can generate between 220 MWe to over 1 GWe of power with modular installations. Furthermore, their technology can be used to destroy radioactive waste. By using thorium fuel, the system does not generate plutonium waste and can even be used to burn long-lived radioactive waste from uranium-based nuclear energy.

Transmutex also offers high-energy physics simulation software for designing energy production systems, radioisotope production, radioprotection, and more. Their particle accelerator can produce radioisotopes for various applications, including medical imaging, cancer therapies, radiography, and food irradiation.

The startup has attracted investment from leading global venture capitalists and private investors, indicating strong confidence in its business model and future prospects.

Keywords: Nuclear Energy, Safety, Cost-Efficiency, Non-Proliferant, Carbon-Free Energy, Radioactive Waste Destruction, Thorium Fuel, High Energy Physics Simulation Software, Radioisotope Production, Venture Capital.

Company overview

Transmutex company information

The essential company record, classifications and operating signals in one place.

Status
Operational
Founded
2019
Headquarters
Vernier, Switzerland
Employees
55
Open positions
None listed
Dealroom signal
72.4
client focusb2btechnologyHardwaretechnologyDeep Techsub industryClean Energysub industryWaste Solutionbusiness modelManufacturingsectorRecyclingsectorSpinoutsectorSustainable Development GoalssectorNuclear FissionsectorClimate TechsectorNovel EnergysectorCircular EconomysectorNIF defense security and resilience

Valuation & funding

Transmutex funding history

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
GRANTOther financing Jan 2025 $4.3M US Department of Energy
SERIES AEquity / VC Jan 2024 $23M $93M FONGIT · AlleyCorp · House Of Ventures · At One Ventures
OtherOther financing Jun 2023 $0 Undisclosed
SERIES AEquity / VC May 2022 $6.6M $26M Undisclosed
SERIES AEquity / VC Jul 2021 $4.9M $19M Union Square Ventures · AlleyCorp · Climate Fund
SEEDEquity / VC May 2021 Undisclosed
SPINOUTOther financing Jul 2019 CERN
Showing 7 recorded eventsUnlock the complete deal history →

Financials

Workforce over time

Available workforce history. Financial fields without reported data are omitted.

YearEmployees
2026 55
2025 59
2024 39
2023 31
2022 22
2021 13
Company filings, research estimates and Dealroom dataOpen the full financial model →

Growth signals

Transmutex website traffic

Latest recorded traffic for Transmutex is 620 monthly website visits, down 85.2% over the last three months. Transmutex's team declined 6.8% over the past year.

Latest monthly visits620 3-month web change-85.2% 1-year team growth-6.8%
Monthly website visits47 observations · Jan 2022–Jul 2026
Hover or focus a point to see its exact monthly valueCompare with peers →

Comparisons

Transmutex compared with similar companies

Dealroom’s weighted taxonomy model identifies the closest operating peers. Company identity and context stay open; selected comparison metrics preview what is available in the platform.

Showing 8 of the closest matchesCompare every metric →

Talent graph

Transmutex's talent

Book a demo to see the people
Team profiled 4 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.

Investors

15 investors on Transmutex's cap table

Sourced from Dealroom's funding and investor records. Investor profile links are shown where available.

Seed 1 investor entered at this stage
US Department of Energy
Series A 11 investors entered at this stage
Union Square Ventures
AlleyCorp
Climate Fund
FONGIT
House Of Ventures
At One Ventures
Steel Atlas
Verve Ventures
Tiny Supercomputer Investment Company
Presight Capital
HCVC
Other known 3 additional known investors
CERN
Plug and Play
Technology Pioneers | World Economic Forum

Global footprint

Where Transmutex has talent and traffic

Workforce by country
8 countries with
team presence
🇨🇭 Switzerland79.3%
🇫🇷 France7.5%
🇺🇸 United States3.8%
🇫🇮 Finland1.9%
🇸🇦 Saudi Arabia1.9%
Top 5 of 8 shown

In the news

Latest news about Transmutex

Recent press, funding announcements, and product moves mentioning Transmutex — open to read from the original sources.

See all news

Market sentiment

What the market is saying about Transmutex

An AI-synthesized read of the highest-engagement posts about Transmutex on X over the past 7 days. We rank by likes & retweets, ignore corporate channels, and surface the themes that broke out from real people.

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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