AIAI Governance StackFree kit

Prompt Security vs Guardion

Both compete in Runtime Enforcement & Guardrails. Prompt Security positions itself as “Runtime security for enterprise GenAI usage, applications, and AI agents”, while Guardionleads with “Zero-trust runtime security and governance for enterprise AI agents”. The table below compares what each publishes.

Where Prompt Security pulls ahead

Publishes support for NIST AI RMF, EU AI Act, GDPR, which Guardion does not. Security teams governing sanctioned and shadow GenAI use while protecting homegrown AI apps and agents

Where Guardion pulls ahead

Regulated enterprises deploying AI agents that need zero-trust runtime governance and data protection

Prompt Security
Guardion
PositioningRuntime security for enterprise GenAI usage, applications, and AI agentsZero-trust runtime security and governance for enterprise AI agents
CategoryRuntime Enforcement & GuardrailsRuntime Enforcement & Guardrails
FrameworksNIST AI RMF, EU AI Act, GDPRNone published
DeploymentSaaS, On-prem, APISaaS, On-prem, API
Built forSecurity, Risk, ComplianceSecurity, Compliance, Risk
Founded20232024
HeadquartersTel Aviv, IsraelDover, Delaware, USA
OwnershipAcquired by SentinelOne (announced August 2025, reported ~$250M)Independent early-stage startup
Funding~$23M total; investors include Hetz Ventures, Jump Capital, Ridge Ventures, Okta, F5Not published
PricingEnterprise licensing / subscriptionEnterprise licensing (not publicly detailed)
Key capabilities
  • Real-time GenAI usage visibility
  • Policy-based prompt and data controls
  • Sensitive-data leakage prevention
  • Prompt-injection and jailbreak prevention
  • MCP gateway security
  • Model-agnostic coverage across major LLMs
  • Zero-trust encrypted agent gateway
  • Runtime prompt-attack detection
  • Sensitive-data discovery and redaction
  • Data-leakage prevention
  • Policy enforcement across agent workflows
  • Low-latency drop-in proxy with high-availability SLA
IntegrationsOpenAI, Anthropic, Google, Browser extensions / proxy, MCP servers, Enterprise SSO/SIEMAI agents and tools via proxy, MCP / tool connections, Enterprise systems in the execution path
Notable customersNone publishedNone published
Best forSecurity teams governing sanctioned and shadow GenAI use while protecting homegrown AI apps and agentsRegulated enterprises deploying AI agents that need zero-trust runtime governance and data protection
LimitationsBeing integrated into SentinelOne, so standalone roadmap may converge with that platform; primarily security-focused rather than a full GRC/compliance suiteVery early-stage and small; limited public track record, customer references, and disclosed funding; product maturity and independent validation still developing

Which should you shortlist?

Choose Prompt Security if security teams governing sanctioned and shadow GenAI use while protecting homegrown AI apps and agents

Choose Guardion if regulated enterprises deploying AI agents that need zero-trust runtime governance and data protection

Neither is a substitute for a governance program. Whichever you pick, you still need people who can define the policies the tool enforces.

Full Prompt Security profile →Full Guardion profile →

AI Governance Tool Selection Kit

A vendor-comparison worksheet plus EU AI Act, NIST AI RMF and ISO/IEC 42001 requirement checklists — so you can shortlist tools against the obligations that actually apply to you.

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