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) |
Pricing/feature source: https://github.com/protectai/llm-guard