Best AI Guardrail Software in 2026
Updated
In short: Enkrypt AI Guardrails is ranked #1 of 21 as of 5 October 2026, ahead of Fiddler Guardrails and OpenSecureAI Prompt Firewall. The best-ranked option with a free plan is Fiddler Guardrails. The lowest first paid tier on this page is Amazon Bedrock Guardrails at $0.07/mo.
AI guardrails are intended to set boundaries around AI use, so compare the safeguards and integration details that matter for your application. The ranked entries are compared on custom policies, jailbreak detection, prompt injection defense and PII detection, along with deployment and SDK languages. Free-plan availability and paid-from pricing can help you weigh cost as well. Enkrypt AI Guardrails, Fiddler Guardrails and OpenSecureAI Prompt Firewall appear first among the entries shown; Pangea AI Guard and PromptGuard follow. Match the listed protections to the risks you need to address, and consider how the deployment choices and SDK support fit the systems your team operates.
21 AI guardrail software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
AI Guardrail Software, ranked on how quickly a newcomer can get going. 7 of the 21 on this page can be tried for free.
- 1 Enkrypt AI GuardrailsPaid from $134/mo
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 2 Fiddler GuardrailsFree plan
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 3 OpenSecureAI Prompt FirewallPaid from $49/mo
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 4 PromptGuardPaid from $19/mo
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: yes
- 5 Amazon Bedrock GuardrailsPaid from $0.07/mo
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 6 Openlayer GuardrailsFree plan
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 7 HiddenLayer AI Runtime Security
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 8 OpenAI Guardrails
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 9 Guardrails AI
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 10 Pangea AI Guard
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 11 Radware Alteon
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 12 OpenGuardrailsPaid from $10/mo
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 13 Oracle Mobile Authenticator
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: yes
- 14 Microsoft Custom Neural Voice
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 15 PII FirewallFree plan
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
- 16 Check Point AI Guardrails
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
- 17 Amazon Nova Reel
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 18 NVIDIA NeMo Guardrails
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
- 19 VotalAI
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
- 20 CyberSecEval
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
- 21 LLM Guard
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
Compare all 21 in a table
| # | Platform | Score | Free plan | From | Free plan | Paid from | Deployment | Prompt injection defense |
|---|---|---|---|---|---|---|---|---|
| 1 | Enkrypt AI Guardrails | 7.2 | Free plan | $134/mo | Yes | 134 /mo | — | Yes |
| 2 | Fiddler Guardrails | 7.1 | Free plan | Free | Yes | — | hybrid | Yes |
| 3 | OpenSecureAI Prompt Firewall | 7.1 | Free plan | $49/mo | Yes | 49 /mo | hybrid | Yes |
| 4 | PromptGuard | 7.1 | Free plan | $19/mo | Yes | — | — | — |
| 5 | Amazon Bedrock Guardrails | 7.0 | No | $0.07/mo | No | — | — | — |
| 6 | Openlayer Guardrails | 7.0 | Free plan | Free | Yes | — | hybrid | Yes |
| 7 | HiddenLayer AI Runtime Security | 6.6 | No | — | — | — | hybrid | Yes |
| 8 | OpenAI Guardrails | 6.5 | No | — | — | — | hybrid | Yes |
| 9 | Guardrails AI | 6.4 | No | — | — | — | — | — |
| 10 | Pangea AI Guard | 6.4 | No | — | Yes | — | hybrid | Yes |
| 11 | Radware Alteon | 6.3 | No | — | — | — | cloud | Yes |
| 12 | OpenGuardrails | 6.2 | No | $10/mo | No | 10 /mo | hybrid | Yes |
| 13 | Oracle Mobile Authenticator | 6.1 | No | — | Yes | — | — | — |
| 14 | Microsoft Custom Neural Voice | 5.9 | No | — | — | — | — | — |
| 15 | PII Firewall | 5.8 | Free plan | Free | — | — | self_hosted | No |
| 16 | Check Point AI Guardrails | 5.7 | No | — | — | — | — | — |
| 17 | Amazon Nova Reel | 5.4 | No | — | No | — | — | — |
| 18 | NVIDIA NeMo Guardrails | 5.4 | No | — | — | — | — | — |
| 19 | VotalAI | 5.3 | No | — | — | — | — | — |
| 20 | CyberSecEval | 5.2 | No | — | Yes | — | — | — |
| 21 | LLM Guard | 4.9 | No | — | — | — | — | — |
Is your platform on this list?
Numbered spots on this list can be sponsored, and a sponsored row is labelled as paid.
Questions about this list
Which AI guardrail software is ranked first on The Geeks Club?
Enkrypt AI Guardrails is ranked #1 of 21 with a score of 7.2. Fiddler Guardrails is second and OpenSecureAI Prompt Firewall third.
How many of these have a free plan?
6 of the 21 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Amazon Bedrock Guardrails has the lowest first paid tier we found: $0.07/mo.
How is this list ranked?
Ranked on how quickly a newcomer can get going: documentation depth, a free tier or trial, and the platforms it runs on.