Data Theorem API Security vs Promptfoo Guardrails: side-by-side comparison (2026)
Data Theorem API Security is a commercial API security solution by Data Theorem. Promptfoo Guardrails is a commercial LLM guardrails solution by Promptfoo. Features, integrations, deployment and the company behind each one, side by side.
API security platform for discovery, testing, and runtime protection
Adaptive LLM guardrails that self-improve via red team feedback loops.
Side-by-side comparison
Feature
Data Theorem API Security
Promptfoo Guardrails
Pricing model
Commercial
Commercial
Category
API Security
LLM Guardrails
Deployment and fit
Deployment type
Hybrid
Hybrid
Company size fit
SMB, Mid-Market, Enterprise
Startup, SMB, Mid-Market, Enterprise
Company
Company
Data Theorem
Promptfoo
Use cases and capabilities
Bot Protection
Yes
No
DAST
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
Integrations
13 integrations listed
No integrations listed
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