Horizon3.ai vs Vectra AI
Which for Cyber Defense AI tool is better in 2026?
Horizon3.ai
Autonomous penetration testing with NodeZero, run continuously at production scale
Vectra AI
Cybersecurity AI that stops attacks others can’t by revealing who's doing what on your network right now.
Side-by-side
Vectra AI is the more established option (raised $425M); pricing is comparable on both sides.
| Metric | Horizon3.ai | Vectra AI |
|---|---|---|
| Taglinei | Autonomous penetration testing with NodeZero, run continuously at production scale | Cybersecurity AI that stops attacks others can’t by revealing who's doing what on your network right now. |
| Foundedi | 2019🏆 | — |
| HQi | San Francisco, United States | US |
| Employeesi | 201-500 | 201-500 |
| Neuron scorei | 72🏆 | 54 |
| Total fundingi | $178.5M | $425M🏆 |
| Latest roundi | Series D · Jun 2025 | Series F · Apr 2021 |
| Valuationi | — | $1.2B🏆 |
| 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 Horizon3.ai and Vectra AI.
| Capability | Horizon3.ai | Vectra AI |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✓ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✗ | ✗ |
| Free trial | ✓ | ✗ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Horizon3.ai
- Higher Neuron score (72 vs 54)
- Offers a free trial
- Newer company (2019)
🔵 Strengths of Vectra AI
- Has raised more capital ($425M vs $178.5M)
Which should you choose?
Choose Vectra AI if price matters most — it starts at Enterprise · Contact sales, 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 Vectra AI if you want the most established option — it has raised $425M, 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 Vectra AI — which is better?
It depends on your priority. Horizon3.ai is the leaner option; Vectra AI has broader feature depth. See the side-by-side table above.
Is Horizon3.ai cheaper than Vectra AI?
No — Vectra AI's cheapest paid plan is Enterprise · Contact sales, while Horizon3.ai's is Enterprise · Contact sales.
Do Horizon3.ai and Vectra AI offer free plans?
Horizon3.ai: Free trial only. Vectra AI: Paid only.
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