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SecurityProtect AI (Palo Alto Networks)

LLM Guard

Security toolkit that sanitizes and screens LLM prompts and responses.

Category
Security
Pricing
FREE
Source
Open source
Platforms
API
Models
Model-agnostic
Verified
Jun 23, 2026

LLM Guard is a security toolkit for large language model applications. It runs prompts and model responses through configurable scanners — prompt-injection and jailbreak detection, PII redaction, toxicity and bias checks, and secrets scanning — to sanitize input and validate output before it reaches users. It ships as a Python library you wrap around your own LLM calls, with the scanners running locally.

Pros & cons

  • Prompt-injection & jailbreak detection
  • PII redaction and secrets scanning
  • Composable input/output scanners
  • Self-hosted — data stays in your stack
  • Active community, well-documented
  • Python library — you build the integration
  • No managed/hosted option
  • Latency from running multiple scanners
  • Tuning needed to cut false positives

Tags

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Open LLM Guard