Guardrails AI
Open-source output-validation framework where composable validators enforce schemas, policies and safety constraints on LLM I/O.
| Category | Guardrails & Safety |
| Open source | Yes |
| Self-hostable | Yes |
| Pricing model | freemium |
| Pricing notes | Apache-2.0 framework free; Guardrails Hub community validators; managed offering for enterprises |
| Framework integrations | openai-sdk, anthropic, langchain, litellm |
| Funding / ownership | $7.5M seed (2024) |
Pricing/feature source: https://www.guardrailsai.com