Best AI Guardrail Software in 2026
Updated
In short: Enkrypt AI Guardrails is ranked #1 of 16 as of 3 October 2026, ahead of Fiddler Guardrails and HiddenLayer AI Runtime Security. The best-ranked option with a free plan is Fiddler Guardrails. The lowest first paid tier on this page is Enkrypt AI Guardrails at $11.17/mo.
16 AI guardrail software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
| # | Platform | Score | Why | From | Free plan | Paid from | Deployment | |
|---|---|---|---|---|---|---|---|---|
| 1 | Enkrypt AI Guardrails | 9.0 | RecognisedAPIDocumented | $11.17/mo | Yes | 134 /mo | — | View |
| 2 | Fiddler Guardrails | 8.2 | RecognisedAPIDocumented | Free | Yes | — | hybrid | View |
| 3 | HiddenLayer AI Runtime Security | 8.0 | RecognisedAPIDocumented | — | — | — | hybrid | View |
| 4 |  Openlayer Guardrails | 8.0 | RecognisedAPIDocumented | Free | Yes | — | hybrid | View |
| 5 |  Pangea AI Guard | 8.0 | RecognisedAPIDocumented | — | Yes | — | hybrid | View |
| 6 | PromptGuard | 7.4 | RecognisedAPIDocumented | $19/mo | Yes | — | — | View |
| 7 | OpenAI Guardrails | 6.5 | RecognisedAPIDocumented | — | — | — | hybrid | View |
| 8 |  VotalAI | 6.2 | RecognisedAPIDocumented | — | — | — | — | View |
| 9 |  OpenSecureAI Prompt Firewall | 6.2 | RecognisedAPIDocumented | $49/mo | Yes | 49 /mo | hybrid | View |
| 10 | NVIDIA NeMo Guardrails | 6.0 | RecognisedAPIDocumented | — | — | — | — | View |
| 11 | Guardrails AI | 5.8 | RecognisedAPIDocumented | — | — | — | — | View |
| 12 | Check Point AI Guardrails | 5.5 | RecognisedAPIDocumented | — | — | — | — | View |
| 13 |  OpenGuardrails | 5.4 | RecognisedAPIDocumented | — | No | 10 /mo | hybrid | View |
| 14 |  CyberSecEval | 5.0 | RecognisedAPIDocumented | — | Yes | — | — | View |
| 15 |  PII Firewall | 4.9 | RecognisedAPIDocumented | — | — | — | self_hosted | View |
| 16 |  LLM Guard | 4.5 | RecognisedAPIDocumented | — | — | — | — | View |
Is your platform on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which AI guardrail software is ranked first on Inferse?
Enkrypt AI Guardrails is ranked #1 of 16 with a score of 9.0. Fiddler Guardrails is second and HiddenLayer AI Runtime Security third.
How many of these have a free plan?
5 of the 16 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Enkrypt AI Guardrails has the lowest first paid tier we found: $11.17/mo.
How is this list ranked?
Ranked on what each maker publishes, open and connectable first: a public API, open-source code, the depth of its documentation and a free tier to try it on. Model lists are sorted by the figure in their title, exactly as each provider publishes it. Paid placements never change a rank.