Data Theorem API Security vs RealmGuard: side-by-side comparison (2026)
Data Theorem API Security is a commercial API security solution by Data Theorem. RealmGuard is a commercial LLM guardrails solution by Realm Labs. Features, integrations, deployment and the company behind each one, side by side.
API security platform for discovery, testing, and runtime protection
AI guardrail platform detecting harmful outputs, prompt injections & policy violations.
Side-by-side comparison
Feature
Data Theorem API Security
RealmGuard
Pricing model
Commercial
Commercial
Category
API Security
LLM Guardrails
Deployment and fit
Deployment type
Hybrid
Hybrid
Company size fit
SMB, Mid-Market, Enterprise
SMB, Mid-Market, Enterprise
Company
Company
Data Theorem
Realm Labs
Use cases and capabilities
Bot Protection
Yes
No
DAST
Yes
No
LLM Guardrails
No
Yes
LLM Security
No
Yes
Prompt Injection
No
Yes
AI Firewall
No
Yes
GenAI Security
No
Yes
Content Filtering
No
Yes
PII
No
Yes
AI Compliance
No
Yes
AI Governance
No
Yes
OWASP
No
Yes
Core features
10 features listed
10 features listed
Integrations
13 integrations listed
No integrations listed
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