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About

HOL Guard is a local-first runtime security layer for AI agents that watches what an AI assistant is about to do and stops risky actions before they happen. It sits between the agent and the computer, evaluating supported tool calls and local artifacts for threats such as secret and credential exposure, destructive commands, prompt-injection-driven actions, malicious or changed packages, risky MCP configuration, and unsafe plugins, skills, hooks, and settings. Known threats can be blocked automatically, while ambiguous actions are paused for user approval so people remain in control. Guard runs entirely on the developer’s machine, works offline, and does not upload files, prompts, or passwords. Local checks typically complete in under 50 milliseconds and require no changes to existing code or routines. It supports coding agents including Claude Code, Cursor, Codex, Gemini CLI, OpenCode, Hermes, and OpenClaw, with tailored integrations that inspect actions before execution.

About

Mountain Theory, the AI security company: every action an autonomous AI takes is checked before it runs, ALLOW, HOLD or BLOCK. Mountain Theory controls what your AI agents can do. Every action is checked before it runs, then allowed, held for a person to approve, or blocked. When an agent tries to work around a block, the workaround is stopped too. When an agent drifts off the task it was given, that is caught. New bad behavior is stopped the day it appears, with no new rule needed. It keeps personal data from leaving your environment and blocks instructions hidden in emails and documents. Rules are written in plain English, with no code. Every decision is logged for your auditor. It works with any AI you already use, in your environment or the cloud. We publish our recorded tests, misses included.

Platforms Supported

Windows Supported
Mac Supported
Linux Supported
Cloud Not Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Developers and engineering teams in need of a tool to prevent AI coding agents from exposing secrets, executing destructive commands, or performing other risky actions

Audience

Enterprise security, risk and IT teams running autonomous AI agents

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Not Supported

API

Offers API Not Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

Pricing

$4.99 per month
Free Version Supported
Free Trial Not Supported

Pricing

Paid plans use flat annual pricing. A 30-day proof of concept is available.
Free Version Not Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Not Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

HOL
Founded: 2024
United States
hol.org/guard

Company Information

Mountain Theory
Founded: 2024
United States
mountaintheory.ai

Alternatives

Alternatives

No Alternatives
nono

nono

Always Further
Spawn

Spawn

OpenRouter

Categories

AI Security Supported

Categories

AI Agent Security Supported

Integrations

Antigravity CLI Supported
Claude Code Supported
Cursor Supported
Gemini CLI Supported
GitHub Supported
GitHub Copilot CLI Supported
Grok Supported
Hermes Agent Supported
Kimi Supported
Model Context Protocol (MCP) Supported
OpenAI Codex Supported
OpenClaw Supported
OpenCode Supported
Pi Agent Supported
Slack Supported
ZCode Supported

Integrations

Antigravity CLI Not Supported
Claude Code Not Supported
Cursor Not Supported
Gemini CLI Not Supported
GitHub Not Supported
GitHub Copilot CLI Not Supported
Grok Not Supported
Hermes Agent Not Supported
Kimi Not Supported
Model Context Protocol (MCP) Not Supported
OpenAI Codex Not Supported
OpenClaw Not Supported
OpenCode Not Supported
Pi Agent Not Supported
Slack Not Supported
ZCode Not Supported
Claim HOL Guard and update features and information
Claim HOL Guard and update features and information
Claim Mountain Theory and update features and information
Claim Mountain Theory and update features and information