7 Best Guardrails AI Alternatives (Self-Hosted)
The best self-hosted alternatives to Guardrails AI.
Guardrails AI is an open-source Python framework for adding structural guardrails to large language model (LLM) applications. It lets you define verifiable guardrails — input/output validation, risk detection, content moderation, and custom policies — that run before and after every LLM call. With built-in support for OpenAI, Anthropic, and local models, Guardrails AI provides a declarative API for safe, reliable LLM deployment. It includes guardrails_hub for pre-built validators covering PII detection, toxicity checking, code safety, and more.