HOL Guard vs OWASP ZAP: Which is Better in 2026?
Choosing between HOL Guard and OWASP ZAP comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
Bottom line: OWASP ZAP wins this matchup. Our overall Security pick is Malwarebytes. Our free Security pick is Intruder. Pick HOL Guard if you need a fully free option.
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
HOL Guard
Local-first runtime firewall for risky agent calls; optional Guard Cloud adds sync, team policy, and fleet visibility.
Best for you if:
- • Developers and AI agent builders who need local checks on shell, secrets, MCP, and package-install calls
- • You want local-first runtime firewall for risky agent calls; optional Guard Cloud adds sync, team policy, and fleet visibility
OWASP ZAP
Open-source web application security scanner
Best for you if:
- • You want free security scanner
- • You want good for web apps
| At a Glance | HOL Guard | OWASP ZAP |
|---|---|---|
Starts at | FreeFree tier available | FreeFree tier available |
Best For | Security | Security |
Rating | - | 4.8/5 |
Free plan | Yes | Yes |
Choose HOL Guard or OWASP ZAP?
Choose HOL Guard if
Local-first runtime firewall for risky agent calls; optional Guard Cloud adds sync, team policy, and fleet visibility.
- Developers and AI agent builders who need local checks on shell, secrets, MCP, and package-install calls
- You want local-first runtime firewall for risky agent calls; optional Guard Cloud adds sync, team policy, and fleet visibility
Choose OWASP ZAP if
Open-source web application security scanner
- You want free security scanner
- You want good for web apps
| Feature | HOL Guard | OWASP ZAP |
|---|---|---|
| Pricing Model | Free | Free |
| User Rating | No ratings yet | ★4.8/5 18 reviews |
| Categories | SecurityDeveloper Tools | SecurityTesting & QA |
In-Depth Analysis
HOL Guard
Local-first runtime firewall for risky agent calls; optional Guard Cloud adds sync, team policy, and fleet visibility.
HOL Guard's local-first model is free, which is extremely generous for solo developers, but the Guard Cloud add-on starts at $49/month for 5 agents, which is fair for small teams needing sync and policy.
Watch out
Guard Cloud $49/month only covers 5 agents; extra agents cost $10/month each
Weaknesses
- -Cloud-only shops with no local agent install — Guard Cloud helps teams, but runtime interception is still agent-local.
Key features
OWASP ZAP
Open-source web application security scanner
OWASP ZAP's pricing is exceptionally generous, being entirely free.
Strengths
- +Free security scanner
- +Good for web apps
- +Active community
- +CI/CD integration
- +Open source
Weaknesses
- -Learning curve
- -False positives
- -Performance varies
- -UI dated
- -Configuration needed
Key features
Pricing: HOL Guard vs OWASP ZAP
| Plan | HOL Guard | OWASP ZAP |
|---|---|---|
| Tier 1 | N/A | Free Free |
Pricing verified from each vendor's public pricing page. Compare in detail on HOL Guard pricing and OWASP ZAP pricing.
Who Should Use What?
On a budget?
Both are free. Compare plans on their websites.
Go with: HOL Guard
Want the highest-rated option?
OWASP ZAP is rated 4.8/5. HOL Guard has no ratings yet.
Go with: OWASP ZAP
Value user reviews?
HOL Guard: no ratings yet. OWASP ZAP: 18 reviews (4.8/5).
Go with: OWASP ZAP
3 Questions to Help You Decide
What's your budget?
Both are free. Pricing won't help you decide here.
What's your use case?
Both are security tools. Compare their specific features to decide.
How important are ratings?
OWASP ZAP is rated 4.8/5; HOL Guard has no ratings yet.
Key Takeaways
OWASP ZAP
- Completely free
- Our pick for this comparison
HOL Guard
- Choose if you want local-first runtime firewall for risky agent calls; optional Guard Cloud adds sync, team policy, and fleet visibility
The Bottom Line
OWASP ZAP wins this matchup. Our overall Security pick is Malwarebytes. Our free Security pick is Intruder.
Frequently Asked Questions
Is HOL Guard or OWASP ZAP better?
OWASP ZAP is rated in our evaluation. Both are free.
What are HOL Guard and OWASP ZAP used for?
HOL Guard: Local-first runtime firewall for risky agent calls; optional Guard Cloud adds sync, team policy, and fleet visibility.. OWASP ZAP: Open-source web application security scanner.
What does HOL Guard cost vs OWASP ZAP?
HOL Guard is completely free. OWASP ZAP is completely free. Visit their websites for detailed pricing.