Castelion vs Hadrian
Which Defense AI AI tool is better in 2026?
Castelion
Mass-producing affordable hypersonic weapons for defense
Hadrian
Factories of the Future to Reindustrialize America, powered by AI for autonomous manufacturing and inspection.
Side-by-side
Hadrian is the more established option (raised $1.4B); pricing is comparable on both sides.
| Metric | Castelion | Hadrian |
|---|---|---|
| Taglinei | Mass-producing affordable hypersonic weapons for defense | Factories of the Future to Reindustrialize America, powered by AI for autonomous manufacturing and inspection. |
| Foundedi | 2022🏆 | — |
| HQi | El Segundo, US | US |
| Employeesi | 201-500 | 51-200🏆 |
| Neuron scorei | 71🏆 | 40 |
| Total fundingi | $1.2B | $1.4B🏆 |
| Latest roundi | series-c · Aug 2026 | series-d · Aug 2026 |
| Valuationi | — | — |
| Cheapest paid plani | Pricing not disclosed | Pricing not disclosed |
| Free plani | ✗ | ✗ |
| Free triali | ✗ | ✗ |
| Top tier pricei | Pricing not disclosed | Pricing not disclosed |
| Pricing summaryi | Enterprise · Contact sales | Enterprise · Contact sales |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Castelion and Hadrian.
| Capability | Castelion | Hadrian |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✗ | ✗ |
| Free trial | ✗ | ✗ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Castelion
- Higher Neuron score (71 vs 40)
- Newer company (2022)
🔵 Strengths of Hadrian
- Has raised more capital ($1.4B vs $1.2B)
Which should you choose?
Choose Hadrian if price matters most — it starts at Enterprise · Contact sales, which is friendlier for teams watching burn. Both Defense AI tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose Hadrian if you want the most established option — it has raised $1.4B, suggesting more runway for enterprise features, support, and long-term roadmap. For mission-critical workflows or larger teams, that stability often outweighs a lower monthly price.
Frequently asked questions
Castelion vs Hadrian — which is better?
It depends on your priority. Castelion is the leaner option; Hadrian has broader feature depth. See the side-by-side table above.
Is Castelion cheaper than Hadrian?
No — Hadrian's cheapest paid plan is Enterprise · Contact sales, while Castelion's is Enterprise · Contact sales.
Do Castelion and Hadrian offer free plans?
Castelion: Paid only. Hadrian: Paid only.
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