A agentindex
Comparison

Guardrails AI vs LLM Guard

A like-for-like, spec-level comparison. Both entries are verified against their docs and repo.

Guardrails AI

Validation and guardrails library for LLM applications.

  • + Rich validator registry for structure, safety, and correctness
  • + Structural validation ensures outputs match expected schemas
  • − Overhead in defining validators for custom use cases
  • − Not a complete security solution on its own

LLM Guard

Open-source security toolkit for sanitizing LLM inputs and outputs.

  • + 35+ built-in scanners covering PII, injection, toxicity, secrets
  • + Self-hosted middleware with input and output scanning
  • − Cannot guarantee 100% detection of novel attacks
  • − Adds latency to every LLM call
Spec Guardrails AI LLM Guard
Role Guardrails Guardrails
Tags guardrails, persona-platform-engineer guardrails, persona-platform-engineer
License Apache-2.0 MIT
Open source Yes Yes
Self-hostable Yes Yes
MCP support No No
Pricing free free
Price Free Free
Usage cost No model cost No model cost
Models multi multi
Languages python python
GitHub stars 7.1k 3.1k
Last activity 2026-06-30 2025-12-15