2 Best HOL Guard Alternatives in 2026 (Open Source)
HOL Guard — Local-first runtime firewall for AI coding agents. It provides local-first, harness-specific enforcement before coding-agent tools run, with optional approvals and evidence.
Short answer
- Closest match to HOL Guard: NemoClaw.
- Most actively developed: NemoClaw (3,176 commits in the last 90 days).
- Fastest growing: NemoClaw (+330 GitHub stars in the last 30 days).
These 2 open-source tools do the same job. They are ordered by how closely they match HOL Guard, with live GitHub data so you can see which projects are actively maintained.
| Tool | GitHub stars | Stars / 30d | Last commit | Downloads / 30d |
|---|---|---|---|---|
| HOL Guard(original) | — | — | — | — |
| NemoClaw | 22.6k | +330 | 2026-10-02 | — |
| LLM Guard | 3.2k | +74 | 2026-07-08 | 101.8K |
1. NemoClaw
Run agents like Hermes, LangChain Deep Agents, and OpenClaw more securely inside NVIDIA OpenShell with managed inference
What sets it apart: Provides a managed, secure execution environment for AI agents using NVIDIA's OpenShell sandbox technology with guided deployment and lifecycle management.
Best for: running AI agents securely in sandboxes; managed agent deployments; enterprise agent safety
2. LLM Guard
The Security Toolkit for LLM Interactions
Best for: Enterprise teams deploying LLMs in production needing security guardrails; Organizations with strict data leakage prevention requirements; Applications handling sensitive user data through LLM interfaces
FAQ
- What are the best alternatives to HOL Guard?
- The closest open-source alternatives to HOL Guard are NemoClaw and LLM Guard. They are ranked by how closely they match what HOL Guard does.
- Which HOL Guard alternative is the most popular?
- NemoClaw has the most GitHub stars among HOL Guard alternatives, with 22,644 stars.
- Which HOL Guard alternative is the most actively maintained?
- By recent activity, NemoClaw (3,176 commits in the last 90 days) is the most actively developed alternative.
Maintain HOL Guard or one of these alternatives?
Each tool page has a maintainer box: a README badge with your live rank and stars, or a homepage + category feature for $49 / 7 days.