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Prompt Security

Enterprise middleware for securing AI applications against prompt attacks

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.

About Prompt Security

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 & Platform Specs

Pricing Summary

Prompt Security (part of SentinelOne) operates as a sales-led enterprise security suite for LLMs and AI applications. Pricing is custom-quoted based on organizational size, monitored prompt traffic, and cloud marketplace procurement.

full pricing breakdown →

Supported Platforms

SaaS proxy, SDK, browser extension, any cloud

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Side-by-Side Comparisons

Lakera logo
Lakera
vs
Prompt Security logo
Prompt Security

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.

LakeraPrompt Security

Community experience

Sources & verification

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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. Prompt Security (part of SentinelOne) operates as a sales-led enterprise security suite for LLMs and AI applications. Pricing is custom-quoted based on organizational size, monitored prompt traffic, and cloud marketplace procurement.

Is Prompt Security still maintained?

Yes — Prompt Security is active. Its listing was last verified on August 26, 2026.

What are the best Prompt Security alternatives?

The first editor-selected Prompt Security alternatives are FuzzyAI, Escape.