GuardionAI vs. Prompt Security (SentinelOne)
Which AI security platform is right for your team? We break down the differences in features, latency, and protection scope to help you decide.
Last reviewed: 2026-07-03
| Feature | GuardionAI | Prompt Security (SentinelOne) |
|---|---|---|
| Primary Focus | Agent Runtime Governance | Enterprise GenAI Governance |
| Tool Call Protection | Deep Inspection | Not documented |
| Deployment | Inline Security Gateway / Guard API / Claude Code plugin | Cloud API |
| Guardrails Latency | <130ms policy decision | < 50ms |
| Detection Accuracy | 96.3 F1 on the Prompt Security Leaderboard with 0.02% false positives | Not published / varies by deployment |
| Compliance | GDPR-ready, HIPAA-ready, LGPD-ready, SOC 2 Type II (in progress) | SOC2, GDPR, NIST AI RMF |
GuardionAI figures from guardion.ai (Policy engine decisions return in under 130ms — 20× faster than cloud provider guardrails.) • Prompt Security (SentinelOne) figures from public documentation, reviewed 2026-07-03.
Choose GuardionAI if...
- •You are building autonomous AI agents that use tools, MCP servers, or APIs.
- •Latency is critical for your application (Policy engine decisions return in under 130ms — 20× faster than cloud provider guardrails).
- •You want DLP for PII and secrets before data leaves your org.
- •You need a single hub to investigate and respond to agent incidents.
Choose Prompt Security (SentinelOne) if...
- •SentinelOne customers extending Singularity to GenAI usage
- •Enterprises prioritizing employee/shadow-AI governance
- •Security teams that want AI risk in the same console as endpoint telemetry
Frequently asked questions
Is Prompt Security still available as a standalone product?
Following the September 2025 acquisition by SentinelOne (~$250M reported), Prompt Security's capabilities are delivered through the SentinelOne Singularity platform rather than as an independent offering.
What is Prompt Security (SentinelOne)?
Secures the entire lifecycle of Generative AI, protecting employees from risky AI use and developers from insecure model integrations. Acquired by SentinelOne in September 2025 (~$250M reported) and integrated into the Singularity platform for prompt injection, data leakage, and shadow AI protection. It is categorized under Runtime Guardrails & AI Firewall in the Guardion AI Security Index.
Who owns Prompt Security (SentinelOne)?
Prompt Security was acquired by SentinelOne. Acquired by SentinelOne in September 2025 (~$250M reported) and integrated into the Singularity platform for prompt injection, data leakage, and shadow AI protection.
Is Prompt Security (SentinelOne) open source?
No, Prompt Security (SentinelOne) is a commercial product (Subscription / Quote).
What are the best Prompt Security (SentinelOne) alternatives?
Teams evaluating Prompt Security (SentinelOne) most often compare it with Lakera (Check Point), Meta (Llama Guard), Cisco AI Defense (Robust Intelligence), and GuardionAI — all listed under Runtime Guardrails & AI Firewall.
How does Prompt Security (SentinelOne) compare to GuardionAI?
Prompt Security (SentinelOne) focuses on enterprise genai governance, while GuardionAI is an agent runtime governance platform ("EDR for AI agents") that governs every agent tool call inline with sub-130ms guardrails latency.
Last reviewed: 2026-07-03
Sources: prompt.security · sentinelone.com