Gray Swan AI Security Suite vs Promptfoo Guardrails: side-by-side comparison (2026)
Gray Swan AI Security Suite is a commercial LLM guardrails solution by Gray Swan. Promptfoo Guardrails is a commercial LLM guardrails solution by Promptfoo. Features, integrations, deployment and the company behind each one, side by side.
Enterprise AI security suite with real-time filtering and automated testing
Adaptive LLM guardrails that self-improve via red team feedback loops.
Side-by-side comparison
Feature
Gray Swan AI Security Suite
Promptfoo Guardrails
Pricing model
Commercial
Commercial
Category
LLM Guardrails
LLM Guardrails
Deployment and fit
Deployment type
Cloud
Hybrid
Company size fit
Mid-Market, Enterprise
Startup, SMB, Mid-Market, Enterprise
Company
Company
Gray Swan
Promptfoo
Use cases and capabilities
Research
Yes
No
LLM Guardrails
No
Yes
LLM Security
No
Yes
AI Firewall
No
Yes
Prompt Injection
No
Yes
GenAI Security
No
Yes
Red Team
No
Yes
Generative AI
No
Yes
Continuous Testing
No
Yes
Adversarial ML
No
Yes
AI Governance
No
Yes
Core features
10 features listed
6 features listed
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