Castelion vs Group14 Technologies
Which Aerospace AI tool is better in 2026?
Castelion
Mass-producing affordable hypersonic weapons for defense
Group14 Technologies
The #1 battery materials company delivering silicon battery technology at global, EV-scale.
Side-by-side
Castelion is the more established option (raised $1.2B); pricing is comparable on both sides.
| Metric | Castelion | Group14 Technologies |
|---|---|---|
| Taglinei | Mass-producing affordable hypersonic weapons for defense | The #1 battery materials company delivering silicon battery technology at global, EV-scale. |
| Foundedi | 2022🏆 | — |
| HQi | El Segundo, US | US |
| Employeesi | 201-500 | 51-200🏆 |
| Neuron scorei | 72🏆 | 0 |
| Total fundingi | $1.2B🏆 | $169M |
| Latest roundi | series-c · Aug 2026 | series-d · May 2023 |
| 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 Group14 Technologies.
| Capability | Castelion | Group14 Technologies |
|---|---|---|
| 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 $169M)
- Higher Neuron score (72 vs 0)
- Newer company (2022)
🔵 Strengths of Group14 Technologies
- Strong in AI Aerospace
Which should you choose?
Choose Group14 Technologies 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 Group14 Technologies — which is better?
It depends on your priority. Castelion has raised more capital and is the more established option; Group14 Technologies has broader feature depth. See the side-by-side table above.
Is Castelion cheaper than Group14 Technologies?
No — Group14 Technologies's cheapest paid plan is Enterprise · Contact sales, while Castelion's is Enterprise · Contact sales.
Do Castelion and Group14 Technologies offer free plans?
Castelion: Paid only. Group14 Technologies: Paid only.
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