Guardrails AI
Guardrails AI is an open-source validator hub for LLM output: you pick Ban List, Detect PII, Detect Jailbreak, or one of the other Hub cards, then generate…
OUR TAKE
Pick Guardrails AI for app teams who will self-host validators (or already have a model endpoint) and want a Hub instead of writing every regex. You run it.
Good fit
App teams who will self-host validators (or already have a model endpoint) and want a Hub instead of writing every regex.
Poor fit
Buyers who want a quoted enterprise prompt firewall with a SOC2 sales motion, or a trace warehouse (Langfuse).
Self-host
USD, before tax · Checked 2026-10-28 · github.com/guardrails-ai/guardrails
OUR TAKE
Pick Guardrails AI for app teams who will self-host validators (or already have a model endpoint) and want a Hub instead of writing every regex. You run it. There is no $20 hosted tile after Aug 2026.
Good fit
App teams who will self-host validators (or already have a model endpoint) and want a Hub instead of writing every regex.
Poor fit
Buyers who want a quoted enterprise prompt firewall with a SOC2 sales motion, or a trace warehouse (Langfuse).
Self-host
USD, before tax · Checked 2026-10-28 · github.com/guardrails-ai/guardrails
What it costs
USD, before tax · Checked 2026-10-28 · github.com/guardrails-ai/guardrails
Self-host
license. You pay compute
$0
Hosted remote inference
Not published by the vendor
Not published by the vendor
Pro
Not published by the vendor
Not published by the vendor
Checked 2026-10-28·github.com/guardrails-ai/guardrails
Before you pay
Good fit
App teams who will self-host validators (or already have a model endpoint) and want a Hub instead of writing every regex.
Poor fit
Buyers who want a quoted enterprise prompt firewall with a SOC2 sales motion, or a trace warehouse (Langfuse).
Watch out
You run it. There is no $20 hosted tile after Aug 2026.
Instead, try
Promptfoo if eval/red-team YAML when you want CI fixtures, not Hub cards; Phoenix if local-first OTel traces when the job is spans, not validators
Compare Guardrails AI with
Limits, in full
- 01
You run it. There is no $20 hosted tile after Aug 2026.
- 02
Pro is a quote. Do not invent dollars.
- 03
Validators, not traces. For generations + cost tables see Lunary or Langfuse.
If Guardrails AI isn't it
Why: eval/red-team YAML when you want CI fixtures, not Hub cards.
Free· open source,MIT
Community red team is 10k probes/monthChecked 2026-10-27·promptfoo.dev/pricing
vs Guardrails AI
Why: local-first OTel traces when the job is spans, not validators.
Free· paid from$50/mo
ELv2, not ApacheChecked 2026-10-27·arize.com/pricing
vs Guardrails AI
Why: traces / evals you can self-host.
Free· paid from$2/mo
Hobby is two users and 30-day retentionChecked 2026-10-19·langfuse.com/pricing
vs Guardrails AILimits & alternatives3 limits · Promptfoo, Phoenix, Langfuse instead
Limits, in full
- 01
You run it. There is no $20 hosted tile after Aug 2026.
- 02
Pro is a quote. Do not invent dollars.
- 03
Validators, not traces. For generations + cost tables see Lunary or Langfuse.
If Guardrails AI isn't it
Why: eval/red-team YAML when you want CI fixtures, not Hub cards.
Free· open source,MIT
Community red team is 10k probes/monthChecked 2026-10-27·promptfoo.dev/pricing
vs Guardrails AIWhy: local-first OTel traces when the job is spans, not validators.
Free· paid from$50/mo
ELv2, not ApacheChecked 2026-10-27·arize.com/pricing
vs Guardrails AIWhy: traces / evals you can self-host.
Free· paid from$2/mo
Hobby is two users and 30-day retentionChecked 2026-10-19·langfuse.com/pricing
vs Guardrails AI