Castelion vs Stoke Space
Which Aerospace AI tool is better in 2026?
Castelion
Mass-producing affordable hypersonic weapons for defense
Stoke Space
Seamless mobility to, through, and from space with fully reusable rocket technology.
Side-by-side
Castelion is the more established option (raised $1.2B); pricing is comparable on both sides.
| Metric | Castelion | Stoke Space |
|---|---|---|
| Taglinei | Mass-producing affordable hypersonic weapons for defense | Seamless mobility to, through, and from space with fully reusable rocket technology. |
| Foundedi | 2022🏆 | — |
| HQi | El Segundo, US | US |
| Employeesi | 201-500 | 51-200🏆 |
| Neuron scorei | 71🏆 | 0 |
| Total fundingi | $1.2B🏆 | $1B |
| Latest roundi | series-c · Aug 2026 | series-e · Sep 2026 |
| Valuationi | — | — |
| Cheapest paid plani | Pricing not disclosed | — |
| Free plani | ✗ | ✗ |
| Free triali | ✗ | ✗ |
| Top tier pricei | Pricing not disclosed | Custom Launch Services · Contact sales |
| Pricing summaryi | Enterprise · Contact sales | 1 published plans |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Castelion and Stoke Space.
| Capability | Castelion | Stoke Space |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✗ | ✗ |
| Free trial | ✗ | ✗ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Castelion
- Has raised more capital ($1.2B vs $1B)
- Higher Neuron score (71 vs 0)
- Newer company (2022)
🔵 Strengths of Stoke Space
- Strong in AI Aerospace
Which should you choose?
Choose Stoke Space if price matters most — it starts at Enterprise · Contact sales, which is friendlier for teams watching burn. Both AI Aerospace 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
Castelion vs Stoke Space — which is better?
It depends on your priority. Castelion has raised more capital and is the more established option; Stoke Space has broader feature depth. See the side-by-side table above.
Is Castelion cheaper than Stoke Space?
No — Stoke Space's cheapest paid plan is Enterprise · Contact sales, while Castelion's is Enterprise · Contact sales.
Do Castelion and Stoke Space offer free plans?
Castelion: Paid only. Stoke Space: Paid only.
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