Alternatives to Castelion
The top Defense companies similar to Castelion, ranked by relevance (named competitors first, then how closely their sectors overlap) and our 0-100 AI-readiness score. Each links to a full profile with funding and team.
Northrop Grumman68Defense TechFalls Church, United States$2.5B- LOLockheed Martin29AerospaceBethesda, United States
- RARaytheon18AerospaceWaltham, USA
Saronic Technologies62Maritime TechnologyUnited States$1.8B
Re:Build Manufacturing47ManufacturingFramingham, United States$545.0M- RARaytheon Technologies
- RARalliant43AerospaceRaleigh, USA$27.3M
Mitsubishi Heavy IndustriesEnergy SystemsTokyo, Japan
Hermeus78AerospaceAtlanta, United States$350.0M
URSA MAJOR71Defense TechBerthoud, United States$193.0M- ISIsembard65ManufacturingBristol, United Kingdom$59.0M
Observable Space64AerospaceAdrian, United States$101.0M
PDW63AerospaceHuntsville, USA$170.0M
Integrate63GovernmentSeattle, United States$17.0M
Dronamics63AerospaceSofia, Bulgaria$105.8M
Redwire61AerospaceJacksonville, USA$63.0M
SkyfireAI59AerospaceAustin, USA$19.5M
MAGDRIVE55SpaceTechHarwell, United Kingdom$12.5M
Avy55AerospaceAmsterdam, Netherlands$10.0M
Kelluu54AerospaceFinland$17.3M
Caracol53AerospaceMilan, Italy
PacSci EMC52AerospaceHollister, United States
Venus Aerospace52AerospaceHouston, United States$39.7M- ONOnodrim51DefenseAmsterdam, Netherlands$43.2M
DesignVerse50Enterprise SoftwareBucharest, Romania$5.5M
DeltaQuad49AerospaceDuivendrecht, Netherlands$47.3M
Antares Industries49Nuclear EnergyLos Angeles, United States
StirLight47AerospaceUnited Kingdom$1.1M
L3Harris Technologies43AerospaceMelbourne, United States- MAMaddox Defense42Defense TechSan Diego, United States$5.0M
- KRKratos Defense40Defense TechSan Diego, United States
General Atomics37Defense TechSan Diego, United States
Airvolute30AerospaceTrnava, Slovakia$1.5M
Airlogix27Defense TechnologyUkraine
Northrop Grumman Systems26Defense TechFalls Church, United States$7.4B- ACAcecore Technologies19AerospaceUden, Netherlands
- ISIsrael Aerospace Industries (IAI)18AerospaceLod, Israel
- BABAE Systems12Defense TechLondon, United Kingdom
- HEHeight Technologies12AerospaceApeldoorn, Netherlands
- SESEOPS10AerospaceHouston, United States
Astro Mechanica10AerospaceSan Francisco, United States- AEAechelon10AerospaceMontreal, Canada
HighcatAerospaceKonstanz, Germany
Beyond VisionAerospaceLisbon, Portugal$3.2M- TATAF IndustriesAerospaceKyiv, Ukraine
Kinetic Engine SystemsAerospaceJerusalem, Israel
Airbus Zephyr85Defense TechPortsmouth, United Kingdom$202.4M- STStoke77AerospaceKent, United States$1.3B
- HAHANWHA75ConglomerateSeoul, South Korea
- RTRTX75AerospaceArlington, United States
Jabil75ManufacturingSt. Petersburg, USA
General Dynamics71AerospaceReston, United States$60.0B
Silvus Technologies69DefenseLos Angeles, USA$163.0M- MAMACHINA LABS69ManufacturingLos Angeles, United States$156.0M
Helicopters/Planes68Aviation TechnologyLos Angeles, United States$615.0M- AMAmca68AerospaceEl Segundo, USA$376.5M
ArianeGroup64SpaceTechParis, France$95.0M- FRFrankenburg Technologies64Defense$36.7M
SLINGSHOT AEROSPACE64AerospaceWindsor, United States$73.8M
Quantum Systems64AerospaceGilching, Germany$726.5M
| Company | Sector | HQ | Funding | Score |
|---|---|---|---|---|
| Northrop Grumman | Defense Tech | Falls Church, United States | $2.5B | 68 |
| LOLockheed Martin | Aerospace | Bethesda, United States | — | 29 |
| RARaytheon | Aerospace | Waltham, USA | — | 18 |
| Saronic Technologies | Maritime Technology | United States | $1.8B | 62 |
| Re:Build Manufacturing | Manufacturing | Framingham, United States | $545.0M | 47 |
| RARaytheon Technologies | — | — | — | — |
| RARalliant | Aerospace | Raleigh, USA | $27.3M | 43 |
| Mitsubishi Heavy Industries | Energy Systems | Tokyo, Japan | — | — |
| Hermeus | Aerospace | Atlanta, United States | $350.0M | 78 |
| URSA MAJOR | Defense Tech | Berthoud, United States | $193.0M | 71 |
| ISIsembard | Manufacturing | Bristol, United Kingdom | $59.0M | 65 |
| Observable Space | Aerospace | Adrian, United States | $101.0M | 64 |
| PDW | Aerospace | Huntsville, USA | $170.0M | 63 |
| Integrate | Government | Seattle, United States | $17.0M | 63 |
| Dronamics | Aerospace | Sofia, Bulgaria | $105.8M | 63 |
| Redwire | Aerospace | Jacksonville, USA | $63.0M | 61 |
| SkyfireAI | Aerospace | Austin, USA | $19.5M | 59 |
| MAGDRIVE | SpaceTech | Harwell, United Kingdom | $12.5M | 55 |
| Avy | Aerospace | Amsterdam, Netherlands | $10.0M | 55 |
| Kelluu | Aerospace | Finland | $17.3M | 54 |
| Caracol | Aerospace | Milan, Italy | — | 53 |
| PacSci EMC | Aerospace | Hollister, United States | — | 52 |
| Venus Aerospace | Aerospace | Houston, United States | $39.7M | 52 |
| ONOnodrim | Defense | Amsterdam, Netherlands | $43.2M | 51 |
| DesignVerse | Enterprise Software | Bucharest, Romania | $5.5M | 50 |
| DeltaQuad | Aerospace | Duivendrecht, Netherlands | $47.3M | 49 |
| Antares Industries | Nuclear Energy | Los Angeles, United States | — | 49 |
| StirLight | Aerospace | United Kingdom | $1.1M | 47 |
| L3Harris Technologies | Aerospace | Melbourne, United States | — | 43 |
| MAMaddox Defense | Defense Tech | San Diego, United States | $5.0M | 42 |
| KRKratos Defense | Defense Tech | San Diego, United States | — | 40 |
| General Atomics | Defense Tech | San Diego, United States | — | 37 |
| Airvolute | Aerospace | Trnava, Slovakia | $1.5M | 30 |
| Airlogix | Defense Technology | Ukraine | — | 27 |
| Northrop Grumman Systems | Defense Tech | Falls Church, United States | $7.4B | 26 |
| ACAcecore Technologies | Aerospace | Uden, Netherlands | — | 19 |
| ISIsrael Aerospace Industries (IAI) | Aerospace | Lod, Israel | — | 18 |
| BABAE Systems | Defense Tech | London, United Kingdom | — | 12 |
| HEHeight Technologies | Aerospace | Apeldoorn, Netherlands | — | 12 |
| SESEOPS | Aerospace | Houston, United States | — | 10 |
| Astro Mechanica | Aerospace | San Francisco, United States | — | 10 |
| AEAechelon | Aerospace | Montreal, Canada | — | 10 |
| Highcat | Aerospace | Konstanz, Germany | — | — |
| Beyond Vision | Aerospace | Lisbon, Portugal | $3.2M | — |
| TATAF Industries | Aerospace | Kyiv, Ukraine | — | — |
| Kinetic Engine Systems | Aerospace | Jerusalem, Israel | — | — |
| Airbus Zephyr | Defense Tech | Portsmouth, United Kingdom | $202.4M | 85 |
| STStoke | Aerospace | Kent, United States | $1.3B | 77 |
| HAHANWHA | Conglomerate | Seoul, South Korea | — | 75 |
| RTRTX | Aerospace | Arlington, United States | — | 75 |
| Jabil | Manufacturing | St. Petersburg, USA | — | 75 |
| General Dynamics | Aerospace | Reston, United States | $60.0B | 71 |
| Silvus Technologies | Defense | Los Angeles, USA | $163.0M | 69 |
| MAMACHINA LABS | Manufacturing | Los Angeles, United States | $156.0M | 69 |
| Helicopters/Planes | Aviation Technology | Los Angeles, United States | $615.0M | 68 |
| AMAmca | Aerospace | El Segundo, USA | $376.5M | 68 |
| ArianeGroup | SpaceTech | Paris, France | $95.0M | 64 |
| FRFrankenburg Technologies | Defense | — | $36.7M | 64 |
| SLINGSHOT AEROSPACE | Aerospace | Windsor, United States | $73.8M | 64 |
| Quantum Systems | Aerospace | Gilching, Germany | $726.5M | 64 |