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Best PII Firewall Alternatives in 2026

Updated

20 apps from AI guardrail software ranked against PII Firewall on the same published basis.

  1. 1
    PromptGuard Free plan apiextensionLinuxMacself-hosted $19/mo6.6
    PII Firewall vs PromptGuard
  2. 2
    Amazon Bedrock Guardrails Web $0.07/mo6.4
    PII Firewall vs Amazon Bedrock Guardrails
  3. 3
    Enkrypt AI Guardrails Free plan apiself-hostedWeb $134/mo6.4
    PII Firewall vs Enkrypt AI Guardrails
  4. 4
    Fiddler Guardrails Free plan apiself-hostedWeb Free6.4
    PII Firewall vs Fiddler Guardrails
  5. 5
    Openlayer Guardrails Free plan apiself-hostedWeb Free6.4
    PII Firewall vs Openlayer Guardrails
  6. 6
    OpenSecureAI Prompt Firewall Free plan self-hostedWeb $49/mo6.4
    PII Firewall vs OpenSecureAI Prompt Firewall
  7. 7
    HiddenLayer AI Runtime Security apiLinuxself-hostedWeb 5.5
    PII Firewall vs HiddenLayer AI Runtime Security
  8. 8
    Guardrails AI apiself-hostedWeb 5.4
    PII Firewall vs Guardrails AI
  9. 9
    OpenAI Guardrails apiself-hostedWeb 5.4
    PII Firewall vs OpenAI Guardrails
  10. 10
    Oracle Mobile Authenticator AndroidiOSWin 5.4
    PII Firewall vs Oracle Mobile Authenticator
  11. 11
    Pangea AI Guard apiextensionself-hosted 5.4
    PII Firewall vs Pangea AI Guard
  12. 12
    Check Point AI Guardrails Web 5.2
    PII Firewall vs Check Point AI Guardrails
  13. 13
    Microsoft Custom Neural Voice Web 5.2
    PII Firewall vs Microsoft Custom Neural Voice
  14. 15
    Radware Alteon apiLinuxself-hostedWeb 5.1
    PII Firewall vs Radware Alteon
  15. 16
    NVIDIA NeMo Guardrails 5.0
    PII Firewall vs NVIDIA NeMo Guardrails
  16. 17
    OpenGuardrails apiself-hostedWeb $10/mo5.0
    PII Firewall vs OpenGuardrails
  17. 18
    VotalAI Web 5.0
    PII Firewall vs VotalAI
  18. 19
    CyberSecEval 4.9
    PII Firewall vs CyberSecEval
  19. 20
    Amazon Nova ReelAmazon Web Services api 4.8
    PII Firewall vs Amazon Nova Reel
  20. 21
    LLM Guard 4.8
    PII Firewall vs LLM Guard

PII Firewall alternatives compared

#AppScoreFree planFromRuns on
1PromptGuard6.6Free plan$19/moAPI, Browser, Linux, Mac, self-hosted, Web, Windows
2Amazon Bedrock Guardrails6.4No$0.07/moWeb
3Enkrypt AI Guardrails6.4Free plan$134/moAPI, self-hosted, Web
4Fiddler Guardrails6.4Free planFreeAPI, self-hosted, Web
5Openlayer Guardrails6.4Free planFreeAPI, self-hosted, Web
6OpenSecureAI Prompt Firewall6.4Free plan$49/moself-hosted, Web
7HiddenLayer AI Runtime Security5.5No—API, Linux, self-hosted, Web
8Guardrails AI5.4No—API, self-hosted, Web
9OpenAI Guardrails5.4No—API, self-hosted, Web
10Oracle Mobile Authenticator5.4No—Android, iOS, Windows
11Pangea AI Guard5.4No—API, Browser, self-hosted
12Check Point AI Guardrails5.2No—Web
13Microsoft Custom Neural Voice5.2No—Web
15Radware Alteon5.1No—API, Linux, self-hosted, Web
16NVIDIA NeMo Guardrails5.0No——
17OpenGuardrails5.0No$10/moAPI, self-hosted, Web
18VotalAI5.0No—Web
19CyberSecEval4.9No——
20Amazon Nova Reel4.8No—API
21LLM Guard4.8No——
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Questions about PII Firewall alternatives

What is the best alternative to PII Firewall?

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

What is the best free alternative to PII Firewall?

PromptGuard is the best-ranked alternative with a free plan. 5 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.