Where is HeFASTo located?

HeFASTo is headquartered in Rez, Czech Republic.

Where does HeFASTo rank among its competitors?

HeFASTo ranks 6th amongst 7 active competitors, only 1 of which is funded. X Energy, which secured $700M in Nov, 2025.

Who are the top competitors of HeFASTo?

HeFASTo's top competitors include X Energy, Jimmy and Stratek Global. Among them, X Energy secured the most recent funding round in November, 2025.

HeFASTo - 2026 Company Profile & Competitors

Company Details

Developer of small modular gas cooled fast nuclear reactor technology. This project focuses on engineering advanced systems for industrial heat production and fuel recycling. The technical approach centers on gas cooled fast reactor designs developed for research and development applications. Operations include the creation of modular reactor concepts intended to facilitate nuclear safety and reliability within the energy sector.

Key Metrics

Founded Year

2012

Location

Rez, Czech Republic

Stage

Unfunded

Ranked

6^th among 7 active competitors

Similar Companies

X Energy & 5 more

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HeFASTo has not raised any funding rounds yet.

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Top competitors of HeFASTo include X Energy, Jimmy and Stratek Global. Here is the list of Top 10 competitors of HeFASTo, ranked by Tracxn score:

Rank	Company Details	Short Description	Total Funding	Investors	Tracxn Score
1st	X Energy 2010, Greenbelt (United States), Public	Developer of small modular & high temperature gas cooled nuclear reactor	$1.53B	Jane Street, C5 Capital & 25 others	65/100
2nd	Jimmy 2021, Levallois Perret (France), Series A	Operator of thermal generators providing decarbonized heat to industrial clients	$17.3M	Eren Groupe, Otium Capital & 4 others	56/100
3rd	Stratek Global 2022, Centurion (South Africa), Unfunded	Developer of high temperature modular reactor	-	-	16/100
4th	Aquariusenergy Menlo Park (United States), Unfunded	Developer of technology for nuclear energy generation using heavy water	-	-	16/100
5th	NuGen 2011, Charlotte (United States), Unfunded	Developer of integrated single cycle microreactors for diverse energy applications	-	-	16/100
6th	HeFASTo 2012, Rez (Czech Republic), Unfunded	Developer of small modular gas cooled fast nuclear reactor technology	-	-	16/100
7th	HolosGen 2017, Manassas (United States), Funding Raised	Developer of mobile scalable integral nuclear generators for distributable and safe electricity	-	Plug and Play Tech Center	15/100