Best OpenAI Guardrails Alternatives in 2026
Updated
20 tools from AI guardrail software ranked against OpenAI Guardrails on the same published basis.
- 1OpenAI Guardrails vs PromptGuard
- 2OpenAI Guardrails vs Enkrypt AI Guardrails
- 3OpenAI Guardrails vs NVIDIA NeMo Guardrails
- 4OpenAI Guardrails vs Fiddler Guardrails
- 5OpenAI Guardrails vs OpenSecureAI Prompt Firewall
- 6OpenAI Guardrails vs Openlayer Guardrails
- 7OpenAI Guardrails vs Amazon Bedrock Guardrails
- 8OpenAI Guardrails vs HiddenLayer AI Runtime Security
- 9OpenAI Guardrails vs VotalAI
- 10OpenAI Guardrails vs CyberSecEval
- 11OpenAI Guardrails vs PII Firewall
- 12OpenAI Guardrails vs LLM Guard
- 14OpenAI Guardrails vs Radware Alteon
- 15OpenAI Guardrails vs Guardrails AI
- 16OpenAI Guardrails vs Pangea AI Guard
- 17OpenAI Guardrails vs Amazon Nova Reel
- 18OpenAI Guardrails vs Check Point AI Guardrails
- 19OpenAI Guardrails vs OpenGuardrails
- 20OpenAI Guardrails vs Oracle Mobile Authenticator
- 21OpenAI Guardrails vs Microsoft Custom Neural Voice
OpenAI Guardrails alternatives compared
| # | Tool | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | PromptGuard | 7.3 | Free plan | $19/mo | API, Browser, Linux, Mac, self-hosted, Web, Windows |
| 2 | Enkrypt AI Guardrails | 7.1 | Free plan | $134/mo | API, self-hosted, Web |
| 3 | NVIDIA NeMo Guardrails | 7.1 | Free plan | Free | API, Linux, Mac, self-hosted, Windows |
| 4 | Fiddler Guardrails | 7.0 | Free plan | Free | API, self-hosted, Web |
| 5 | OpenSecureAI Prompt Firewall | 7.0 | Free plan | $49/mo | self-hosted, Web |
| 6 | Openlayer Guardrails | 6.9 | Free plan | Free | API, self-hosted, Web |
| 7 | Amazon Bedrock Guardrails | 6.8 | No | $0.07/mo | Web |
| 8 | HiddenLayer AI Runtime Security | 6.8 | No | — | API, Linux, self-hosted, Web |
| 9 | VotalAI | 6.8 | No | — | API, self-hosted, Web |
| 10 | CyberSecEval | 6.7 | Free plan | Free | API, Linux, self-hosted |
| 11 | PII Firewall | 6.7 | Free plan | Free | Linux, self-hosted |
| 12 | LLM Guard | 6.6 | Free plan | Free | API, Linux, self-hosted |
| 14 | Radware Alteon | 6.6 | No | — | API, Linux, self-hosted, Web |
| 15 | Guardrails AI | 6.5 | No | — | API, self-hosted, Web |
| 16 | Pangea AI Guard | 6.5 | No | — | API, Browser, self-hosted |
| 17 | Amazon Nova Reel | 6.4 | No | — | API, Web |
| 18 | Check Point AI Guardrails | 6.4 | No | — | API, self-hosted, Web |
| 19 | OpenGuardrails | 6.4 | No | $10/mo | API, self-hosted, Web |
| 20 | Oracle Mobile Authenticator | 6.3 | No | — | Android, iOS, Windows |
| 21 | Microsoft Custom Neural Voice | 6.0 | No | — | 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 7.3 out of 10. The others here: Enkrypt AI Guardrails, NVIDIA NeMo Guardrails, Fiddler 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 on what each maker publishes, the fullest spec sheet first: how deeply the product is documented, the platforms it runs on, a free tier or trial to test it, and its standing.