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Best OpenAI Guardrails Alternatives in 2026

Updated

20 apps from AI guardrail software ranked against OpenAI Guardrails on the same published basis.

  1. 1
    PromptGuard Free plan apiextensionLinuxMacself-hosted $19/mo6.6
    OpenAI Guardrails vs PromptGuard
  2. 2
    NVIDIA NeMo Guardrails Free plan apiLinuxMacself-hostedWin Free6.5
    OpenAI Guardrails vs NVIDIA NeMo Guardrails
  3. 3
    Amazon Bedrock Guardrails Web $0.07/mo6.4
    OpenAI Guardrails vs Amazon Bedrock Guardrails
  4. 4
    Enkrypt AI Guardrails Free plan apiself-hostedWeb $134/mo6.4
    OpenAI Guardrails vs Enkrypt AI Guardrails
  5. 5
    Fiddler Guardrails Free plan apiself-hostedWeb Free6.4
    OpenAI Guardrails vs Fiddler Guardrails
  6. 6
    Openlayer Guardrails Free plan apiself-hostedWeb Free6.4
    OpenAI Guardrails vs Openlayer Guardrails
  7. 7
    OpenSecureAI Prompt Firewall Free plan self-hostedWeb $49/mo6.4
    OpenAI Guardrails vs OpenSecureAI Prompt Firewall
  8. 8
    CyberSecEval Free plan apiLinuxself-hosted Free6.3
    OpenAI Guardrails vs CyberSecEval
  9. 9
    LLM Guard Free plan apiLinuxself-hosted Free6.3
    OpenAI Guardrails vs LLM Guard
  10. 10
    PII Firewall Free plan Linuxself-hosted Free6.3
    OpenAI Guardrails vs PII Firewall
  11. 11
    HiddenLayer AI Runtime Security apiLinuxself-hostedWeb 5.5
    OpenAI Guardrails vs HiddenLayer AI Runtime Security
  12. 12
    Check Point AI Guardrails apiself-hostedWeb 5.4
    OpenAI Guardrails vs Check Point AI Guardrails
  13. 13
    Guardrails AI apiself-hostedWeb 5.4
    OpenAI Guardrails vs Guardrails AI
  14. 15
    Oracle Mobile Authenticator AndroidiOSWin 5.4
    OpenAI Guardrails vs Oracle Mobile Authenticator
  15. 16
    Pangea AI Guard apiextensionself-hosted 5.4
    OpenAI Guardrails vs Pangea AI Guard
  16. 17
    VotalAI Free trial apiself-hostedWeb 5.4
    OpenAI Guardrails vs VotalAI
  17. 18
    Microsoft Custom Neural Voice Web 5.2
    OpenAI Guardrails vs Microsoft Custom Neural Voice
  18. 19
    Amazon Nova ReelAmazon Web Services apiWeb 5.1
    OpenAI Guardrails vs Amazon Nova Reel
  19. 20
    Radware Alteon apiLinuxself-hostedWeb 5.1
    OpenAI Guardrails vs Radware Alteon
  20. 21
    OpenGuardrails apiself-hostedWeb $10/mo5.0
    OpenAI Guardrails vs OpenGuardrails

OpenAI Guardrails alternatives compared

#AppScoreFree planFromRuns on
1PromptGuard6.6Free plan$19/moAPI, Browser, Linux, Mac, self-hosted, Web, Windows
2NVIDIA NeMo Guardrails6.5Free planFreeAPI, Linux, Mac, self-hosted, Windows
3Amazon Bedrock Guardrails6.4No$0.07/moWeb
4Enkrypt AI Guardrails6.4Free plan$134/moAPI, self-hosted, Web
5Fiddler Guardrails6.4Free planFreeAPI, self-hosted, Web
6Openlayer Guardrails6.4Free planFreeAPI, self-hosted, Web
7OpenSecureAI Prompt Firewall6.4Free plan$49/moself-hosted, Web
8CyberSecEval6.3Free planFreeAPI, Linux, self-hosted
9LLM Guard6.3Free planFreeAPI, Linux, self-hosted
10PII Firewall6.3Free planFreeLinux, self-hosted
11HiddenLayer AI Runtime Security5.5No—API, Linux, self-hosted, Web
12Check Point AI Guardrails5.4No—API, self-hosted, Web
13Guardrails AI5.4No—API, self-hosted, Web
15Oracle Mobile Authenticator5.4No—Android, iOS, Windows
16Pangea AI Guard5.4No—API, Browser, self-hosted
17VotalAI5.4No—API, self-hosted, Web
18Microsoft Custom Neural Voice5.2No—Web
19Amazon Nova Reel5.1No—API, Web
20Radware Alteon5.1No—API, Linux, self-hosted, Web
21OpenGuardrails5.0No$10/moAPI, self-hosted, Web
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Questions about OpenAI Guardrails alternatives

What is the best alternative to OpenAI Guardrails?

PromptGuard, number 1 in AI guardrail software with a score of 6.6 out of 10. The others here: NVIDIA NeMo Guardrails, Amazon Bedrock Guardrails, Enkrypt AI Guardrails and 16 more.

What is the best free alternative to OpenAI Guardrails?

PromptGuard is the best-ranked alternative with a free plan. 9 of the 20 alternatives here publish a free plan on their own pricing pages.

How are these alternatives ranked?

Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation.