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Guardrails alternatives

Curated alternatives to Guardrails — and why you'd switch.

plano

AI-native Envoy-based proxy for agentic apps: agent orchestration via a 4B routing model, smart LLM routing, guardrail filter chains and zero-code OTEL traces. Rust, framework-agnostic.

Why switchTwo places to enforce guardrails: NeMo Guardrails runs Colang rails in-process around a model or chain, Plano enforces moderation/jailbreak filters at the proxy so every agent inherits them without code changes.
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