Guardrails AI vs ZeroTrusted AI Firewall

Guardrails AI9.0Visit ZeroTrusted AI Firewall7.0Visit

Higher score Guardrails AI #1 in LLM Security Tools 9.0/10 Open source ✓ 4 of 5 features Visit Guardrails AI

vs

ZeroTrusted AI Firewall #6 in LLM Security Tools 7.0/10 Pricing on request · 15-day trial ✓ 5 of 5 features Visit ZeroTrusted.ai

• Guardrails AI fits best

  Open-source runtime validation and policy enforcement

• ZeroTrusted AI Firewall fits best

  Security teams needing broad inline AI protection

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Side by side

Feature	Guardrails AI 9.0/10 Visit ↗	ZeroTrusted AI Firewall 7.0/10 Visit ↗
At a glance
Editor score	9.0	7.0
Ranking	#1 in LLM Security Tools	#6 in LLM Security Tools
Best for	Open-source runtime validation and policy enforcement	Security teams needing broad inline AI protection
Pricing model	Free	Paid
Starting price	Not published	Not published
Free plan	Not published	—
Free trial	—	—
Deployment	Cloud, Self-hosted	Cloud, Self-hosted, Browser extension
Platforms	Web	Web
Compliance	SOC 2	SOC 2, ISO 27001, GDPR, HIPAA, PCI DSS
Built for	Small business, Mid-market, Enterprise	Mid-market, Enterprise
Features Guardrails AI 4/5 · ZeroTrusted AI Firewall 5/5
Prompt injection defense	✓	✓
PII redaction	✓	✓
Secrets detection	✓	✓
Output guardrails	✓	✓
Model-abuse detection	Not published	✓ (best)
Specs
Deployment model	Hybrid	Hybrid
Our review
Pros	Covers PII, prompt injection, jailbreaks, secrets, and hallucinations Supports runtime validation for both LLM inputs and outputs Runs in cloud or on-premises environments with customizable validators	Inspects prompts, responses, and tool calls with policy rules Redacts PII, PHI, classified data, and secrets Supports SaaS, on-premises, air-gapped, and multi-cloud deployment
Cons	Validator selection and customization require policy-design work Guardrails Pro is a separate offering for centralized management Its focus is runtime governance rather than broader model development	Custom enterprise pricing can make budgeting less direct No free plan is available The published offering centers on one Enterprise plan
Our verdict	Guardrails AI is an open-source framework for building, governing, and scaling production generative-AI applications across LLMs and deployment environments. It is designed for developers who need runtime controls around model… Read the review →	ZeroTrusted AI Firewall is an AI security layer for organizations operating LLMs, agents, and AI APIs. It inspects prompts, model responses, and tool calls in real time, with controls for prompt injection, jailbreaks, data exfiltration,… Read the review →

Strengths and trade-offs

• Guardrails AI — where it wins

  • Covers PII, prompt injection, jailbreaks, secrets, and hallucinations
  • Supports runtime validation for both LLM inputs and outputs
  • Runs in cloud or on-premises environments with customizable validators

  Where it doesn't

  • Validator selection and customization require policy-design work
  • Guardrails Pro is a separate offering for centralized management
  • Its focus is runtime governance rather than broader model development

• ZeroTrusted AI Firewall — where it wins

  • Inspects prompts, responses, and tool calls with policy rules
  • Redacts PII, PHI, classified data, and secrets
  • Supports SaaS, on-premises, air-gapped, and multi-cloud deployment

  Where it doesn't

  • Custom enterprise pricing can make budgeting less direct
  • No free plan is available
  • The published offering centers on one Enterprise plan

• Guardrails AI9.0/10 · Open source

  A broad open-source toolkit for runtime LLM validation, policy enforcement, and risk detection.

  Visit Guardrails AIFull verdict →
• ZeroTrusted AI Firewall7.0/10 · Pricing on request · 15-day trial

  Broad inline protection for organizations running LLMs, agents, and AI APIs.

  Visit ZeroTrusted.aiFull verdict →