PromptGuard – A firewall securing AI prompt interactions

Summary: PromptGuard is a drop-in security layer that intercepts requests between applications and large language models (LLMs) to block prompt injections, redact sensitive data, and prevent information leaks without code changes. It supports providers like OpenAI, Claude, Groq, and Azure, enhancing security for AI-powered applications.

What it does

PromptGuard analyzes incoming prompts to detect malicious instructions and redact personally identifiable information before forwarding requests to LLMs. It operates by simply replacing the base URL, requiring no modifications to existing code.

Who it's for

It is designed for teams and companies integrating LLMs into their applications who need to secure AI interactions against prompt injection and data leaks.

Why it matters

Prompt injection can override system prompts and expose sensitive data, creating security risks that traditional tools cannot address in AI workflows.