LLM Guard Review 2026

Security toolkit for LLMs to detect prompt injection and PII

⭐ 3k+ stars 📜 Open Source 🏷️ skill

Overview

Security toolkit for LLMs to detect prompt injection and PII

✓ Detects prompt injection attacks and jailbreak attempts before they reach your LLM
✓ Identifies and redacts PII like emails, phone numbers, and credit card data automatically
✓ Runs entirely locally without sending sensitive data to external security services
✓ Provides fine-grained control over sanitization rules and detection thresholds

✗ Requires Python expertise and dependency management; more complex setup than plug-and-play solutions
✗ Detection accuracy depends on regex patterns and ML models; may have false positives on benign inputs

• {'icon': '🛡️', 'title': 'Prompt Injection Detection', 'desc': 'Identifies and blocks prompt injection attacks and jailbreak attempts before they reach your LLM, protecting against instruction override exploits.'}
• {'icon': '🔍', 'title': 'Automatic PII Redaction', 'desc': 'Detects and masks sensitive data including emails, phone numbers, credit cards, and SSNs in real-time without manual configuration.'}
• {'icon': '🔒', 'title': 'Local-Only Processing', 'desc': 'Runs entirely on-premises without transmitting sensitive user data to external services, maintaining complete data privacy and compliance.'}
• {'icon': '⚡', 'title': 'Pre and Post-Request Scanning', 'desc': 'Guards both user inputs before processing and LLM outputs after generation, creating dual-layer protection against security risks.'}
• {'icon': '📋', 'title': 'Configurable Security Policies', 'desc': 'Define custom detection rules and thresholds for your specific use case, from strict security to lenient policies based on application needs.'}

LLM Guard is a solid open-source skill tool with 3k+ GitHub stars. It is worth evaluating against your specific requirements.

LLM Guard is a skill tool with 3k+ GitHub stars. Security toolkit for LLMs to detect prompt injection and PII

LLM Guard is Open Source. Check the official website for current pricing.