LLM Guard Alternatives
Open-source input and output scanners for LLM apps; the repository was archived in July 2026
LLM Guard is an open-source security toolkit for LLM applications, from Protect AI.
Explore 8 alternatives to LLM Guard across 1 category. Updated September 2026.
Top LLM Guard alternatives at a glance
- HOL Guard. Local-first runtime firewall that intercepts AI coding agent tool calls before they run
- HAIEC. Scans AI application code, runs adversarial tests against live endpoints, and generates signed compliance evidence
- Redcells. Automated adversarial testing for AI systems you own, with replayable evidence
- Presidio. Microsoft open-source SDK for detecting and anonymizing PII in text and images
- Guardrails AI. Open-source framework for adding input and output validators around LLM calls
Compare LLM Guard with its alternatives
| Product | Pricing Model | Free Tier | Open Source | Hosting | HQ |
|---|---|---|---|---|---|
| LLM Guard | Free | ✓ | ✓ | Self-hosted | 🇺🇸 United States |
| HOL Guard | Freemium | ✓ | ✓ APACHE2 | Self-hosted | — |
| HAIEC | Subscription | ✓ | — | Cloud | 🇺🇸 United States |
| Redcells | Pay-per-use | — | — | Cloud | — |
| Presidio | Free | ✓ | ✓ | Cloud + Self-hosted | 🇺🇸 United States |
| Guardrails AI | — | ✓ | ✓ | — | — |
| NeMo Guardrails | Free | ✓ | ✓ | Self-hosted | 🇺🇸 United States |
| Cleanlab | — | ✓ | — | — | 🇺🇸 United States |
| Lakera | Contact Sales | ✓ | — | Cloud | 🇺🇸 United States |
📊 Observability & Analytics
Presidio
Microsoft open-source SDK for detecting and anonymizing PII in text and images
Open Source
Free Trial
Guardrails AI
Open-source framework for adding input and output validators around LLM calls
Open Source
Free Trial
NeMo Guardrails
NVIDIA toolkit for adding programmable guardrails to LLM conversational apps
Open Source
Free Trial
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