Horizon3.ai vs Kestrel AI
Which for Cyber Defense AI tool is better in 2026?
Horizon3.ai
Autonomous penetration testing with NodeZero, run continuously at production scale
Kestrel AI
AI-Native Cloud Incident Response Platform
Side-by-side
Horizon3.ai is the more established option (raised $178.5M); pricing is comparable on both sides.
| Metric | Horizon3.ai | Kestrel AI |
|---|---|---|
| Taglinei | Autonomous penetration testing with NodeZero, run continuously at production scale | AI-Native Cloud Incident Response Platform |
| Foundedi | 2019🏆 | 2025 |
| HQi | San Francisco, United States | San Francisco, US |
| Employeesi | 201-500🏆 | 1-10 |
| Neuron scorei | 72🏆 | 50 |
| Total fundingi | $178.5M🏆 | $500K |
| Latest roundi | Series D · Jun 2025 | Seed · Jan 2025 |
| 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 | Pricing not listed |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Horizon3.ai and Kestrel AI.
| Capability | Horizon3.ai | Kestrel AI |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✓ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✗ | ✗ |
| Free trial | ✓ | ✗ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Horizon3.ai
- Has raised more capital ($178.5M vs $500K)
- Higher Neuron score (72 vs 50)
- Offers a free trial
- More mature (2019)
🔵 Strengths of Kestrel AI
- Newer company (2025)
Which should you choose?
Choose Kestrel AI if price matters most — it starts at Pricing not listed, which is friendlier for teams watching burn. Both AI for Cyber Defense tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose Horizon3.ai if you want the most established option — it has raised $178.5M, 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
Horizon3.ai vs Kestrel AI — which is better?
It depends on your priority. Horizon3.ai has raised more capital and is the more established option; Kestrel AI has broader feature depth. See the side-by-side table above.
Is Horizon3.ai cheaper than Kestrel AI?
No — Kestrel AI's cheapest paid plan is Pricing not listed, while Horizon3.ai's is Enterprise · Contact sales.
Do Horizon3.ai and Kestrel AI offer free plans?
Horizon3.ai: Free trial only. Kestrel AI: Paid only.
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