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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 9 alternatives to LLM Guard across 1 category. Updated October 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
AiDren. Drop-in security proxy that blocks prompt injection and data leaks in LLM apps by changing one base URL
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

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
AiDren	Subscription	✓	—	—	🇬🇧 United Kingdom
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