Attestari vs HOL Guard - AI Tool Comparison 2026
Data updated: (latest change to a listed tool; GateOnAI Scores are recomputed nightly)
In-depth comparison of Attestari and HOL Guard. Compare features, pricing, use cases, and find the best AI tool for your needs.
Attestari
Independent verifier that audits npm and PyPI packages before AI agents install them.
Category: Cybersecurity
Pricing: Free
Best for: Cybersecurity
HOL Guard
Local-first runtime firewall for AI coding agents
Category: Cybersecurity
Pricing: Free
Best for: Cybersecurity
Side-by-Side Comparison
| Feature | Attestari | HOL Guard |
|---|---|---|
| Pricing | Free | Free |
| Category | Cybersecurity | Cybersecurity |
| Best For | Cybersecurity | Cybersecurity |
| GateOnAI Score | 67/100 | 68/100 |
| Website | Attestari | HOL Guard |
Frequently Asked Questions
What is Attestari?
Attestari provides an independent examination of the packages that AI agents install. It reads the exact file downloaded by a package manager—not the source repository—and runs a fixed set of checks on every MCP server and agent tool listed in public registries. For each finding, Attestari publishes the file name, line number, and exact text that triggered the issue, and if a package cannot be read, it reports the reason instead of assigning a grade. All verdicts are public and no publisher pays for the assessment. Grading is based on the highest confirmed severity of findings: Grade A for no confirmed findings, Grade B when the highest confirmed severity is low, and an F for any high‑severity finding. Packages that cannot be fully examined receive no grade, with the limitation recorded. The methodology emphasizes transparency, artifact‑level analysis, and continuous re‑examination of each version rather than a one‑time registry check. GateOnAI Score: 67/100.
What is HOL Guard?
HOL Guard provides a checkpoint for AI agents, letting you allow, ask, or block risky actions before they run. It monitors actions such as destructive commands, secret access, software installs, and data movement, and records each event for later review. On supported integrations, Guard can stop operations like deleting files, reading cloud credentials, or sending data to external sites, while permitting normal tasks such as building projects. The tool runs on your computer, so your files never leave your machine, and it is free to start with optional Guard Cloud plans for cross‑device decision history and shared policies. HOL Guard is open‑source, with release history and verified contributors listed, and includes a plugin scanner that auto‑detects extensions, computes trust scores, and offers CI integration via GitHub Actions. It aims to help developers place a safety layer between their AI agents and the host system, catching mistakes before they cause harm. GateOnAI Score: 68/100.
What is the difference between Attestari and HOL Guard?
Attestari is best for Cybersecurity. HOL Guard is designed for Cybersecurity. Attestari strengths: Listed as free to use; Online at our latest daily check. HOL Guard strengths: Listed as free to use; Online at our latest daily check.
Which is better: Attestari or HOL Guard?
GateOnAI rates Attestari 67/100 and HOL Guard 68/100. Attestari is tagged for Cybersecurity. HOL Guard is tagged for Cybersecurity. Choose Attestari if you need Listed as free to use. Choose HOL Guard if you need Listed as free to use.
Is Attestari free?
Attestari offers Free pricing. Get started for free.
Is HOL Guard free?
HOL Guard offers Free pricing. Get started for free.
What are the pros and cons of Attestari vs HOL Guard?
Attestari pros: Listed as free to use; Online at our latest daily check. Main limitation: No limitations recorded on GateOnAI. HOL Guard pros: Listed as free to use; Online at our latest daily check. Main limitation: No limitations recorded on GateOnAI.