Vigil Guard

Paid#22 of 30 in LLM Security Tools

Vigil Guard: Broad LLM security coverage across browser, API, agent, and policy controls. Ranked #22 of 30 in LLM Security Tools by our editors (7.1/10); pricing: Pricing on request; best for teams needing browser and runtime protection.

7.1/10★★★★☆Editor score

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At a glance

• Editor score
  7.1 / 10
• Pricing
  Pricing on request
• Best for
  Teams needing browser and runtime protection
• Prompt injection defense
  Yes
• Facts checked
  21 Sep 2026

• Where it wins

  • Covers prompt injection, PII, moderation, drift, and agent runtime risks
  • Supports browser monitoring, API integration, SIEM export, and credential controls
  • Enterprise includes on-premises, air-gapped deployment, and custom policies

• Where it doesn't

  • Advanced API integration starts with the Growth plan
  • Unlimited users and environments are limited to Enterprise
  • Licensing depends on scope and environment

Our verdict on Vigil Guard

Vigil Guard is an AI Detection and Response platform for securing LLM applications, autonomous agents, employee AI tools, and internal AI usage. It analyzes prompts, model responses, and agent actions in real time, with coverage for direct and indirect prompt injection, PII, content moderation, semantic drift, and runtime controls. Its browser extension and API integrations make it relevant to teams protecting both employee-facing AI use and developer-built applications.

The platform’s standout strength is the breadth of its policy and detection layer. Vigil Guard can detect and filter sensitive data, apply masking, moderate content across safety categories, and return ALLOW, SANITIZE, or BLOCK decisions. It also monitors assistant behavior against its intended scope, supports credential-path deny-lists and URL access controls, and exports security events through CEF or JSON for SIEM workflows. Integrations span OpenAI, Anthropic, Google, Meta, Mistral, Microsoft, xAI, LiteLLM, n8n, Bielik.ai, and Claude Code.

Plan structure determines how much deployment and operational support teams receive. Starter includes up to 100 users, unlimited AI agents, six detection layers, prompt injection and jailbreak detection, PII detection and policy enforcement, and the browser extension. Growth adds OpenAI-compatible API integration, deployment guidance, and priority support. Enterprise adds unlimited users and environments, full on-premises and air-gapped deployment, custom policies and integrations, compliance-ready logging, SLA coverage, and dedicated support. Teams needing browser protection and core detection can start with Starter; organizations requiring broad API deployment, isolated environments, or tailored controls should consider the higher tiers.

Vigil Guard pricing

All 3 Vigil Guard plans and prices →

Vigil Guard fact sheet

Vigil Guard integrations

Vigil Guard lists 11 integrations on its own site.

• OpenAI
• Anthropic
• Google
• Meta
• Mistral
• n8n
• Microsoft
• xAI
• LiteLLM
• Bielik.ai
• Claude Code

Alternatives to Vigil Guard

• Guardrails AIA broad open-source toolkit for runtime LLM validation, policy enforcement, and risk detection.9.3
• LGLLM GuardA self-hosted toolkit for scanning prompts, outputs, PII, secrets, and LLM risks.9.2
• NVIDIA NeMo GuardrailsA broad, self-hosted toolkit for controlling inputs, outputs, tools, and AI-agent behavior.9.1

See all Vigil Guard alternatives →

Featured on iTechGuides

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update