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Prompt Security

Enterprise middleware for securing AI applications against prompt attacks

paidupdated Apr 21, 2026

Prompt Security provides enterprise security middleware that protects AI applications from prompt injection, data leakage, jailbreaks, and toxic content generation. It sits between users and LLM APIs to inspect, filter, and sanitize inputs and outputs in real-time. Supports deployment as a proxy, SDK integration, or browser extension with customizable security policies and compliance reporting.

Prompt Security addresses the growing enterprise concern that AI applications introduce novel attack surfaces that traditional security tools cannot detect. The platform operates as a security layer between users and LLM-powered applications, inspecting both inputs for prompt injection and adversarial manipulation attempts and outputs for sensitive data leakage, toxic content, and policy violations. This bidirectional inspection runs in real-time without adding significant latency to the AI interaction.

The deployment model provides flexibility for different integration scenarios. Organizations can deploy Prompt Security as a network proxy that intercepts all LLM API traffic transparently, as an SDK integrated directly into application code for fine-grained control, or as a browser extension that monitors AI tool usage across the organization. Security policies are customizable per application, user group, or data sensitivity level, enabling nuanced controls that balance security with usability.

Enterprise features include comprehensive audit logging of all AI interactions for compliance documentation, automated detection and redaction of personally identifiable information before it reaches LLM providers, custom classifier training for organization-specific sensitive data patterns, and integration with SIEM platforms for centralized security monitoring. The platform targets organizations in regulated industries where the risk of data leakage through AI applications creates compliance liability.

Pricing

Enterprise pricing based on deployment size

Platforms

SaaS proxy, SDK, browser extension, any cloud

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Comparisons

Lakera vs Prompt Security: AI Defense Plane or Workforce and MCP Control?

Lakera and Prompt Security both protect generative-AI interactions, but their current product boundaries are no longer those of two independent point startups. Lakera is now part of Check Point's AI Defense Plane, where workforce visibility, agent discovery and risk assessment, runtime AI Guardrails, and red-team services are documented as connected layers. Prompt Security is owned by SentinelOne and continues to present focused controls for employee AI use, homegrown applications, code assistants, and agentic/MCP traffic. Lakera is the stronger default for an enterprise building a broad AI security program. Its current documentation connects application and agent runtime protection to workforce governance and agent posture, while retaining a standalone Guard API tier and a self-hosted/on-prem option. Prompt Security is the sharper specialist when the immediate buying problem is shadow AI, code-assistant policy, or MCP gateway enforcement, especially for a SentinelOne-aligned security organization.

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FAQ

What is Prompt Security?

Prompt Security provides enterprise security middleware that protects AI applications from prompt injection, data leakage, jailbreaks, and toxic content generation. It sits between users and LLM APIs to inspect, filter, and sanitize inputs and outputs in real-time. Supports deployment as a proxy, SDK integration, or browser extension with customizable security policies and compliance reporting.

Is Prompt Security free?

No — Prompt Security is a paid tool. Enterprise pricing based on deployment size

What are the best Prompt Security alternatives?

The top editor-verified Prompt Security alternatives are FuzzyAI, Escape.