prompt-firewall

Open-source Prompt Firewall — deflect up to 95% of redundant LLM traffic before it leaves your infrastructure. Documents: https://isartor-ai.github.io/Isartor/index.html

🔥 QFIRE — a prompt firewall for LLM applications (proxy + CLI + benchmark harness) in Rust (100+ firewall rules).

Local-first prompt firewall — stop secrets & PII from reaching AI tools (IDE, git, AI-API proxy, MCP). Built on Microsoft Presidio.

An open source inline security layer that sits between user applications and large language models (LLMs) to monitor, filter, and modify inbound prompts and outbound responses in real time.

AI Gateway — independent third-party profile of a public API surface, by API Evangelist. An API Evangelist landscape index of AI gateways — the LLM routers, prompt firewalls, model fallback proxies, cost-control planes, and policy engines that sit between applications and AI providers.