LLM Guard (Protect AI)
Open-source input/output scanner toolkit (35+ scanners) for PII, injection and toxicity checks on LLM traffic.
| Category | Guardrails & Safety |
| Open source | Yes |
| Self-hostable | Yes |
| Pricing model | free |
| Pricing notes | MIT OSS scanners free; enterprise via Palo Alto Networks (Protect AI acquisition) |
| Framework integrations | openai-sdk, langchain |
| Funding / ownership | Protect AI acquired by Palo Alto Networks (2025) |
| GitHub stars | 3,068 |
| Maintenance | slow (2025-12-15) |
| License (GitHub) | MIT |
| Open issues | 35 |
| Maturity signal | 64/100 (Established) — computed from public GitHub signals, see methodology |
Pricing/feature source: https://github.com/protectai/llm-guard
Maturity signal is computed from public GitHub data only. How it is calculated.
Frequently asked questions
Is LLM Guard (Protect AI) open source?
Yes. Licensed under MIT.
Can I self-host LLM Guard (Protect AI)?
Yes — LLM Guard (Protect AI) can run in your own infrastructure.
How much does LLM Guard (Protect AI) cost?
Free. MIT OSS scanners free; enterprise via Palo Alto Networks (Protect AI acquisition)