Pick Guardrails AI if
app teams who will self-host validators (or already have a model endpoint) and want a Hub instead of writing every regex.
Read the Guardrails AI pageGuardrails AI vs Langfuse
Our take
Pick Guardrails AI if you're on a app team who will self-host validators (or already have a model endpoint) and want a Hub instead of writing every regex. Pick Langfuse if you're on a team shipping LLM apps who need traces and a cost tile, not another chat UI. Skip Guardrails AI if you're buyers who want a quoted enterprise prompt firewall with a SOC2 sales motion, or a trace warehouse (Langfuse). Skip Langfuse if
Best for
Guardrails AI Fail a bad completion before it ships
Langfuse Debug and cost-track generations
Free plan
Guardrails AI $0 · license. You pay compute
Langfuse $0 · for the MIT core. ee/ is not the community license
Lowest paid
Guardrails AI Not published by the vendor
Langfuse Enterprise $2/mo
Next step up
Guardrails AI
Langfuse Core $29/mo
Runs where
Guardrails AI Hosted
Langfuse Local or hosted
Watch out
Guardrails AI You run it
Langfuse Hobby is two users and 30-day retention
Last checked
Guardrails AI 2026-10-28 · github.com/guardrails-ai/guardrails
Langfuse 2026-10-19 · langfuse.com/pricing
Which one, then?
Pick Langfuse if
teams shipping LLM apps who need traces and a cost tile, not another chat UI.
Read the Langfuse page