Castelion vs Helsing
Which Defense AI AI tool is better in 2026?
Castelion
Mass-producing affordable hypersonic weapons for defense
Helsing
Helsing is a new type of defence company providing AI-enabled precision mass and autonomous systems across all domains.
Side-by-side
Castelion is the more established option (raised $469M); pricing is comparable on both sides.
| Metric | Castelion | Helsing |
|---|---|---|
| Taglinei | Mass-producing affordable hypersonic weapons for defense | Helsing is a new type of defence company providing AI-enabled precision mass and autonomous systems across all domains. |
| Foundedi | 2022 | 2021🏆 |
| HQi | El Segundo, US | DE |
| Employeesi | 201-500 | 51-200🏆 |
| Neuron scorei | 69🏆 | 34 |
| Total fundingi | $469M🏆 | Undisclosed |
| Latest roundi | Series B · Dec 2025 | — |
| Valuationi | — | — |
| Cheapest paid plani | Pricing not disclosed | — |
| Free plani | ✗ | ✗ |
| Free triali | ✗ | ✗ |
| Top tier pricei | Pricing not disclosed | Enterprise · Contact sales |
| Pricing summaryi | Enterprise · Contact sales | 1 published plans |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Castelion and Helsing.
| Capability | Castelion | Helsing |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✗ | ✗ |
| Free trial | ✗ | ✗ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Castelion
- Has raised more capital ($469M vs Undisclosed)
- Higher Neuron score (69 vs 34)
- Newer company (2022)
🔵 Strengths of Helsing
- More mature (2021)
Which should you choose?
Choose Helsing 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 $469M, 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 Helsing — which is better?
It depends on your priority. Castelion has raised more capital and is the more established option; Helsing has broader feature depth. See the side-by-side table above.
Is Castelion cheaper than Helsing?
No — Helsing's cheapest paid plan is Enterprise · Contact sales, while Castelion's is Enterprise · Contact sales.
Do Castelion and Helsing offer free plans?
Castelion: Paid only. Helsing: Paid only.
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