Castelion competitors and alternatives
As of Nov 13, 2026, Alion lists 10 companies most like Castelion: Mach Industries, Lockheed Martin, RTX, Hypersonica, Tiberius Aerospace, Saab, Covenant, Cambridge Aerospace, MBDA UK and Saronic Technologies.
- Castelion itself has 233 open roles on Alion.
- Of them, Lockheed Martin is hiring the most, with 4,259 open roles.
- Lockheed Martin has raised the most venture funding on record: $1.4B.
- Open roles at Saronic Technologies rose the most: from 181 on Oct 12, 2026 to 246 now.
Castelion 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 | Lead investors | Employees | Headquarters | Main technologies | Hiring in |
|---|---|---|---|---|---|---|---|---|---|
Castelion
This company
|
233 | – | $1.1B | Series C $1B2026 | – | 501-1000 | El Segundo, United States | Python, C++, MATLAB | United States |
Mach Industries
In common: Defense Manufacturing, Missiles · Python, Rust, SQL · headquarters in United States |
182 | +27%since Oct 12, 2026 | $784.1M | Venture round $600M2026 | – | 201-500 | Huntington Beach, United States | Python, C++, MATLAB | United States |
Lockheed Martin
In common: Defense Manufacturing, Missiles · Python, Rust, SQL · headquarters in United States |
4,259 | – | $1.4B | Venture round $1.2B2026 | – | 5000+ | Bethesda, United States | Python, C++, Linux | United States, United Kingdom, Argentina +7 more |
RTX
In common: Defense Manufacturing, Missiles · Python, Rust, SQL · headquarters in United States |
3,601 | – | – | – | – | 5000+ | Arlington, United States | Python, C++, MATLAB | United States, Canada, United Kingdom +28 more |
Hypersonica
In common: Missiles, Defense Manufacturing · Python, Rust, C++ |
70 | – | $108M | Series B $108M2026 | Lightspeed Venture Partners, General Catalyst | 51-200 | Munich, Germany | C++, Clean Architecture, Qt | Germany, United Kingdom, Canada |
Tiberius Aerospace
In common: Defense Manufacturing, Missiles · Python, Rust, C++ · headquarters in United States |
20 | +25%since Oct 12, 2026 | – | – | – | – | Tucson, United States | MATLAB, HPC, Python | United States |
Saab
In common: Defense Manufacturing, Missiles · Python, Rust, SQL |
388 | – | – | – | – | 5000+ | Linköping, Sweden | C++, Linux, Python | Sweden, Germany, United Kingdom +9 more |
Covenant
In common: Defense Manufacturing, Missiles · Python, SQL, C++ · headquarters in United States |
26 | – | – | – | – | – | Washington, United States | AS9100, Python, C++ | United States, Germany |
Cambridge Aerospace
In common: Missiles, Defense Manufacturing · Python, Rust, SQL |
45 | – | $300M | Venture round2026 | – | 201-500 | Cambridge, United Kingdom | Python, MATLAB, C++ | United Kingdom, Germany, United States +1 more |
MBDA UK
In common: Missiles, Defense Manufacturing · Python, SQL, C++ |
191 | – | – | – | – | 1001-5000 | Stevenage, United Kingdom | MATLAB, C++, Simulink | United Kingdom, Spain |
Saronic Technologies
In common: Defense Manufacturing · Python, Rust, SQL · headquarters in United States |
246 | +36%since Oct 12, 2026 | – | – | – | 501-1000 | Austin, United States | Python, SolidWorks, Autonomous Navigation | United States, United Kingdom, Australia |
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 Castelion'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, "Castelion competitors and alternatives: 10 similar companies compared on hiring and funding", as of Nov 13, 2026. https://alion.io/company/castelion/competitors