PromptShield

What it does

PromptShield is the only fully open-source, self-hosted security gateway for LLM applications. It catches SSNs, emails, credit cards, passwords, and API keys in real time with PII detection. Define security rules without touching code using simple YAML policies, and see exactly what's being blocked with real-time audit trails. Everything runs on Docker Compose in your own infrastructure. No SaaS, no third parties, no data leaving your systems.

Open source LLM gateway with PII and secret detection built in. Runs on your infrastructure. - promptshieldhq/promptshield

PromptShield is an open source LLM security platform. It places a gateway in front of your model traffic to detect secrets and PII, enforce a YAML policy, and emit audit/metrics data. The dashboard provides policy and operational visibility without SDK changes. Note: Only the gateway is required. The detection engine and dashboard are optional. Gateway-only mode includes built-in secret detection (150+ Gitleaks rules), rate limiting, token budgets, and audit logging. Add the engine for PII and injectionfrom github.com

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