Bone AI vs Castelion
Which Defense AI AI tool is better in 2026?
Bone AI
Mission-ready physical AI for defense and government
Castelion
Mass-producing affordable hypersonic weapons for defense
Side-by-side
Castelion is the more established option (raised $1.2B); pricing is comparable on both sides.
| Metric | Bone AI | Castelion |
|---|---|---|
| Taglinei | Mission-ready physical AI for defense and government | Mass-producing affordable hypersonic weapons for defense |
| Foundedi | 2025 | 2022🏆 |
| HQi | Seoul, KR | El Segundo, US |
| Employeesi | 11-50 | 201-500🏆 |
| Neuron scorei | 53 | 71🏆 |
| Total fundingi | $12M | $1.2B🏆 |
| Latest roundi | Seed · Nov 2025 | series-c · 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 Bone AI and Castelion.
| Capability | Bone AI | Castelion |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✗ | ✗ |
| Free trial | ✗ | ✗ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Bone AI
- Newer company (2025)
🔵 Strengths of Castelion
- Has raised more capital ($1.2B vs $12M)
- Higher Neuron score (71 vs 53)
- More mature (2022)
Which should you choose?
Choose Castelion 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 Castelion if you want the most established option — it has raised $1.2B, 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
Bone AI vs Castelion — which is better?
It depends on your priority. Bone AI is the leaner option; Castelion has broader feature depth. See the side-by-side table above.
Is Bone AI cheaper than Castelion?
No — Castelion's cheapest paid plan is Enterprise · Contact sales, while Bone AI's is Enterprise · Contact sales.
Do Bone AI and Castelion offer free plans?
Bone AI: Paid only. Castelion: Paid only.
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