Antares Nuclear competitors and alternatives
As of Nov 13, 2026, Alion lists 10 companies most like Antares Nuclear: General Matter, Kairos Power, The Nuclear Company, Commonwealth Fusion Systems, Helion Energy, Type One Energy, Westinghouse Electric Company, Centrus Energy, TerraPower and Pacific Fusion.
- Antares Nuclear itself has 77 open roles on Alion.
- Of them, Westinghouse Electric Company is hiring the most, with 869 open roles.
- Commonwealth Fusion Systems has raised the most venture funding on record: $2.7B.
- Open roles at Kairos Power rose the most: from 35 on Oct 12, 2026 to 64 now.
Antares Nuclear and its competitors compared
Open roles are the postings Alion lists today; their change is shown only for career sites that state posting dates. Funding is the venture money on record. A dash means Alion holds no figure.
| Company | Open roles | Change | Raised | Last round | Employees | Headquarters | Main technologies | Hiring in |
|---|---|---|---|---|---|---|---|---|
Antares Nuclear
This company
|
77 | – | $380M | Venture round $60M2026 | 201-500 | Torrance, United States | Python, MATLAB, ASME NQA-1 | United States |
General Matter
In common: Nuclear Energy, Nuclear Engineering · Python, Go, C++ · headquarters in United States |
125 | +14%since Oct 12, 2026 | – | – | 51-200 | San Francisco, United States | Python, AutoCAD, C++ | United States |
Kairos Power
In common: Nuclear Energy, Nuclear Engineering · Python, C++, MATLAB · headquarters in United States |
64 | +83%since Oct 12, 2026 | $100M | Venture round $100M2026 | 201-500 | Alameda, United States | SolidWorks, Python, MATLAB | United States |
The Nuclear Company
In common: Nuclear Energy, Nuclear Engineering · Python, Go, C++ · headquarters in United States |
49 | +2%since Oct 12, 2026 | $51M | Venture round $51M2025 | 51-200 | Columbia, United States | Python, AWS, Machine Learning | United States |
Commonwealth Fusion Systems
In common: Nuclear Energy, Nuclear Engineering · Python, Go, C++ · headquarters in United States |
130 | +17%since Oct 12, 2026 | $2.7B | Series B $863M2025 | 1001-5000 | Devens, United States | Python, AutoCAD, SolidWorks | United States |
Helion Energy
In common: Nuclear Energy, Nuclear Engineering · Python, Go, C++ · headquarters in United States |
77 | – | $500M | Venture round $500M2021 | 501-1000 | Everett, United States | Python, MATLAB, SolidWorks | United States, Switzerland |
Type One Energy
In common: Nuclear Energy, Nuclear Engineering · Python, C++, MATLAB · headquarters in United States |
34 | – | $200M | Venture round $200M2026 | 51-200 | Knoxville, United States | Python, ANSYS, MATLAB | United States |
Westinghouse Electric Company
In common: Nuclear Energy, Nuclear Engineering · Python, C++, MATLAB · headquarters in United States |
869 | – | – | – | 5000+ | Cranberry Township, United States | Power BI, Python, Microsoft Excel | United States, Poland, Spain +11 more |
Centrus Energy
In common: Nuclear Energy, Nuclear Engineering · Python, MATLAB, SolidWorks · headquarters in United States |
71 | – | – | – | 201-500 | Bethesda, United States | Microsoft Excel, ASME NQA-1, GD&T | United States |
TerraPower
In common: Nuclear Energy, Nuclear Engineering · Python, C++, MATLAB · headquarters in United States |
70 | – | – | – | 501-1000 | Bellevue, United States | ASME NQA-1, Python, Microsoft Excel | United States |
Pacific Fusion
In common: Nuclear Energy, Nuclear Engineering · Python, Go, MATLAB · headquarters in United States |
27 | – | $900M | Venture round $900M2024 | 51-200 | Fremont, United States | Python, MATLAB, SolidWorks | United States |
How the list is made
The list comes from Alion's similar-companies engine, the same one AI agents query through the Alion MCP server. A company ranks higher when it shares more of Antares Nuclear's industry segments and is less spread over others, when its job postings name the same technologies, when it is headquartered in the same country and when its size is close. The list is rebuilt every week.
How to cite this page
These figures are published under a free licence. You may reuse them, including commercially, as long as you credit Alion and link back to this page.
Alion, "Antares Nuclear competitors and alternatives: 10 similar companies compared on hiring and funding", as of Nov 13, 2026. https://alion.io/company/antaresindustries/competitors