Best Website Security Scanners in 2026: Troja vs OWASP ZAP vs Snyk vs Burp Suite

Four tools, four different jobs

"Best security scanner" is the wrong question — these tools do genuinely different things. Snyk scans your dependencies and code. Burp is a manual pentester's toolkit. ZAP is an open-source dynamic scanner. Troja is a fast, fix-oriented scanner built for developers shipping with AI tools. Here's how they actually compare, with no pretense that one replaces all the others.

The quick verdict

OWASP ZAP

The open-source Zed Attack Proxy is a respected DAST tool. It proxies traffic, spiders your site, and runs active/passive scans for injection, XSS, and misconfigurations.

• Strengths: free, powerful, scriptable, automatable in CI, no usage limits.
• Weaknesses: real setup and tuning required; noisy results need triage; no dependency or BaaS coverage; you interpret findings yourself.
• Use it if: you want a free, self-hosted dynamic scanner and have the time to configure it.

Snyk

Snyk is fundamentally different — it's SAST + SCA, not a black-box web scanner. It reads your code and dependency manifests to find vulnerable packages, insecure code patterns, container issues, and IaC misconfigs.

• Strengths: excellent dependency/CVE coverage, deep IDE and CI integration, fix PRs for vulnerable packages.
• Weaknesses: needs source/repo access; doesn't probe your running site the way an attacker does; won't catch a misconfigured RLS policy on your live database.
• Use it if: your priority is supply-chain and dependency risk inside the codebase.

Burp Suite

The professional pentester's standard. Burp is an intercepting proxy plus a deep toolkit (Repeater, Intruder, Scanner in Pro) for manual security testing.

• Strengths: unmatched depth and control for skilled testers; finds complex logic and chained vulnerabilities automated tools miss.
• Weaknesses: steep learning curve; largely manual; overkill for a solo dev who just wants to know if their app is safe to launch.
• Use it if: you're a security professional doing hands-on testing.

Troja

Troja is built for the developer who ships with Cursor, Claude, or Windsurf and wants a fast, actionable answer to "is my app safe and visible?"

• Strengths: point it at a URL — no install; 120+ security checks including BaaS misconfigurations (Supabase RLS, Firebase rules) that the others skip; every finding ships a paste-ready AI fix prompt; plus SEO (68 checks) and AEO (46 checks) in the same pass; MCP server so your AI agent can scan and fix in a loop.
• Weaknesses: it's a focused scanner, not a manual pentest framework like Burp, and not a code-level SCA like Snyk.
• Use it if: you want fast, prioritized, fix-first results for a modern (often AI-built) web app — and you care about whether AI engines can see you, not just whether attackers can.

How to choose

• Solo dev / indie SaaS shipping fast: Troja for the live-app + BaaS + fix-prompt workflow; add Snyk in CI for dependencies.
• Open-source-only budget: ZAP for DAST plus npm audit for dependencies.
• Security professional: Burp for manual testing, Snyk for SCA.
• Enterprise: realistically a combination — SCA in CI, DAST in staging, periodic manual pentests.

A pragmatic split many teams land on is one scanner per layer, wired into CI so nothing is manual:

# .github/workflows/security.yml — one tool per layer
jobs:
  deps:
    steps:
      - run: npx snyk test --severity-threshold=high   # supply chain
  liveapp:
    steps:
      - run: npx troja scan https://staging.example     # outside-in + BaaS + headers

Snyk reads the code; Troja attacks the running app and checks your Supabase/Firebase rules — together they cover the two layers a single tool can't.

These aren't mutually exclusive. The honest answer for most shipping developers is Troja for the fast outside-in pass and a dependency scanner in CI — and Burp only when you bring in a professional.

Scan it with Troja

If you want to see what the outside-in, fix-first approach catches on your app — including the Supabase and Firebase misconfigs the other tools don't check — run a free Troja scan and get your threat count in about 30 seconds.