Agentifact assessment — independently scored, not sponsored. Last verified Mar 8, 2026.
LLM Guard
Security toolkit from ProtectAI with 2.5M+ downloads for sanitizing LLM prompts and responses. Input scanners detect prompt injection, PII, ban topics, and secrets; output scanners catch bias, malicious URLs, and deanonymization. Provides real-time safety and compliance filtering via Python library. Open-source core is free; enterprise support available from ProtectAI.
Viable option — review the tradeoffs
You need to block prompt injections, PII leaks, and toxic content in production LLM apps without slowing inference or tying to one model.
Blocks 90%+ common attacks like injections/secrets; fast overhead (<100ms); ML scanners solid but tune for false positives; model-agnostic works everywhere.
You build RAG/agent apps and must secure retrieved context + tool calls against data exfiltration or jailbreaks.
Proven in RAG demos (e.g., blocks PII in HR screening); handles multi-turn but scan pre-ingest for scale; open-source core free.
Not a full runtime monitor
Scans only text prompts/outputs; misses tool calls, multi-turn flows, or non-text attacks—use ProtectAI Layer for agents.
False positives on edge cases
Toxicity/PromptInjection scanners flag legit inputs (e.g., code snippets, competitor names); configure Ban* scanners or set fail_fast=False to review.
LLM Guard excels at scanners; NeMo at policy rails.
Pick for modular input/output filtering in any LLM stack.
Pick NeMo for structured conversations with enforced flows.
Trust Breakdown
What It Actually Does
Scans AI text inputs and outputs to block harmful content like prompt injections, leaked passwords, and biased language before they reach users or the model.
Security toolkit from ProtectAI with 2.5M+ downloads for sanitizing LLM prompts and responses. Input scanners detect prompt injection, PII, ban topics, and secrets; output scanners catch bias, malicious URLs, and deanonymization. Provides real-time safety and compliance filtering via Python library.
Open-source core is free; enterprise support available from ProtectAI.
Fit Assessment
Best for
- ✓llm-security
- ✓prompt-injection-protection
- ✓pii-anonymization
- ✓toxicity-filtering
Score Breakdown
Protocol Support
Capabilities
Governance
- prompt-injection-prevention
- pii-masking
- secrets-detection
- toxicity-filtering
- token-limit