This page's audience our own tag's counts — open to see them

Period

–Visits

–Page views

–Clicks to vendors

–Time on page

–Reading now

Clicks to vendors, by tool

Top countries

Devices

– · visits, page views and clicks counted by our own tag, which counts more than our checked analytics; every figure rounded down · how we count

Guardrails AI

Free#4 of 23 in AI Guardrail SoftwareLLM Security Tools AI Agent Security Software

Guardrails AI: A flexible open-source framework for checking LLM inputs, outputs, and application risks. Ranked #4 of 23 in AI Guardrail Software by our editors (8.8/10); pricing: Open source; best for teams wanting open-source, flexible guardrails.

8.8/10Editor score

Visit Guardrails AI

Guardrails AI8.8 Visit Guardrails AI

At a glance

Editor score
8.8 / 10
Pricing
Open source
Best for
Teams wanting open-source, flexible guardrails
Paid from
Free
Facts checked
21 Sep 2026

Where it wins
- Validates inputs and outputs across multiple LLM application risks
- Detects PII, secrets, prompt injection, jailbreaks, and hallucinations
- Supports cloud and on-premises deployment with customizable validators
Where it doesn't
- Customization and validator selection require developer involvement
- Guardrails Pro is a separate offering for centralized management
- Its focus is LLM application governance rather than broad software security

Our verdict on Guardrails AI

Guardrails AI is an open-source framework for building, governing, and scaling production generative-AI applications. It is designed for developers and teams that need runtime checks around LLM applications across web, API, and self-hosted environments. Validators can inspect inputs and outputs for PII, prompt injection, jailbreaks, secrets, unsafe code, hallucinations, factuality issues, and policy violations. The framework also supports content moderation rules and PII anonymization.

Its strongest value is breadth within the AI guardrail layer. Teams can select validators from Guardrails Hub, customize them, and apply checks during application runtime rather than treating safety review as a separate process. The published capabilities cover both input-side and output-side controls, including prompt-injection defense, jailbreak detection, secrets masking, factuality validation, and policy enforcement. That makes Guardrails AI suitable for applications where several risk types need to be addressed through one framework.

Deployment flexibility is another important consideration. Guardrails AI supports cloud and on-premises environments, giving teams options for how guardrails are operated. The open-source model can suit organizations that want control over validator selection and deployment, but it also places more responsibility on developers to configure and maintain those controls. The separate Guardrails Pro offering adds centralized guardrail deployment and management for enterprise use. Choose Guardrails AI when open-source flexibility, customizable validation, and hybrid deployment matter most; consider another option if your priority is a narrowly scoped tool with minimal engineering ownership.

Your product? Our editors can test Guardrails AI in depth and publish a review, labelled as paid · from $149/mo →

Guardrails AI pricing

Plans Open sourceFree Free to use — no paid tier required for the core job.

See plans on guardrailsai.com

Guardrails AI fact sheet

Free plan	Not verified
Paid from	Free
Deployment	Not verified
Prompt injection defense	Not verified
PII detection	Not verified
Jailbreak detection	Not verified
Custom policies	Not verified
SDK languages	Not verified
Deployment	Cloud, Self-hosted
Platforms	Web
Compliance & security	SOC 2
Support	Community, Docs
Built for	Small business, Mid-market, Enterprise (editorial estimate)
Pricing	Open source
Website	guardrailsai.com
Facts checked	21 Sep 2026

Alternatives to Guardrails AI

See all Guardrails AI alternatives →

Guardrails AI vs the competition

Compare Guardrails AI with any tool side by side →

Also Ranked In

Guardrails AI is ranked in 3 of our directories.

Used Guardrails AI? Be the first to review it

The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used Guardrails AI for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.

Write a reviewTwo minutes · verified accounts only · read by an editor before it appears

Reviews come only from verified accounts. Sign in or create an account first — your e-mail is never shown.

Title

Your review

0 characters · at least 80, up to 3,000

Pros (optional · one per line)

Cons (optional · one per line)

Your name (shown with your review)

Role (optional)

Company (optional)

How long have you used it?

I've used Guardrails AI myself and this is my honest opinion — nobody paid or asked me to write it.

Posted from your verified account. Reviews appear after an editor reads them, usually within two working days.

Featured on iTechGuides

Guardrails AI is listed in our AI Guardrail Software directory. Add the badge to your site — it links back to this page.

<a href="https://www.itechguides.com/products/guardrails-ai/"><img src="https://www.itechguides.com/best/badge/guardrails-ai.svg" alt="Featured on iTechGuides" width="230" height="46"></a>

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Last updated 7 Oct 2026 · How we research and update