ZeriFlow vs CheckVibe vs Snyk vs OWASP ZAP (2026): Which Security Scanner Should You Use?

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Quick Comparison Table

ZeriFlow

ZeriFlow is a deployed-app security scanner built specifically for developers who want a fast, clear answer to "is my app secure?" You paste in a URL, hit scan, and within 60 seconds you get a security score out of 100 along with a prioritized list of issues — each one with a copy-paste fix included.

What it checks. ZeriFlow runs 80+ checks across six critical categories: TLS/SSL configuration (certificate validity, cipher strength, protocol versions), HTTP security headers (CSP, HSTS, X-Frame-Options, and more), cookie security flags (HttpOnly, Secure, SameSite), DNS configuration, email authentication (SPF, DKIM, DMARC), and basic source code exposure. It covers the full surface area of a deployed web application.

Pricing. The free tier gives you 3 scans per day — enough to check your main domain and a staging environment regularly. The Pro plan is $9.99/month, which includes unlimited scans, CI/CD webhook integration, PDF reports, and historical scan tracking. Token packs are also available for teams that need batch scanning without a subscription. All paid plans include a 14-day money-back guarantee.

Strengths. The biggest differentiator is actionability. Every issue in the report comes with an explanation of the risk and the exact code or configuration change needed to fix it. There is no translation step between "here is the problem" and "here is the fix." ZeriFlow is also 2x cheaper than CheckVibe at $9.99/mo versus roughly $16/mo — a meaningful difference for solo developers and small teams. CI/CD integration means you can block deployments that regress your security score.

Limitations. ZeriFlow does not yet offer an MCP server integration (no native Cursor or Claude Code plugin as of 2026). It also does not have Supabase-specific or Firebase-specific checks — things like Row Level Security validation or anon key exposure detection are not in scope. These are CheckVibe's differentiators.

Best for. Developers and vibe coders who want a complete deployed-app security baseline fast. If you are launching a product and need to know your security posture before you go live, ZeriFlow is the most efficient path.

CheckVibe

CheckVibe is ZeriFlow's closest direct competitor — also built for the vibe coder and solo developer market, also scanning the deployed app in under 60 seconds. The differences are meaningful but narrow.

What it checks. CheckVibe runs 100+ checks, slightly more than ZeriFlow, and covers much of the same ground: TLS, HTTP headers, cookies, and general web security hygiene. Where CheckVibe genuinely differentiates is in its BaaS-specific checks: it natively detects Supabase Row Level Security misconfigurations and exposed anon keys, and it does the same for Firebase. If your app is built on Supabase or Firebase, these checks matter — they catch a category of vulnerability that ZeriFlow does not currently surface.

MCP server integration. CheckVibe ships an MCP server, which means you can run security scans directly from inside Cursor, Claude Code, or Windsurf without leaving your IDE. For developers who live in their code editor, this is a significant workflow improvement. You can scan, get results, and fix — all without switching context.

Pricing. CheckVibe costs approximately $16/month (£13) — about 60% more than ZeriFlow's $9.99/mo. The free tier offers a basic scan with limited detail.

Limitations. The higher price point is the main friction. CheckVibe's TLS and DNS depth is also slightly less detailed than ZeriFlow's, and the email authentication checks (SPF, DKIM, DMARC) are less comprehensive. If you are not building on Supabase or Firebase and do not need the MCP integration, you are paying a premium for features you will not use.

Best for. Vibe coders who are deep in a Supabase or Firebase stack and want native IDE integration. If your workflow is Cursor-first and your backend is Supabase, CheckVibe's $6/mo premium is likely worth it. For everyone else, ZeriFlow covers more ground at a lower price.

Snyk

Snyk is not a deployed-app scanner — and understanding that distinction is essential before you decide whether it belongs in your stack.

What it checks. Snyk operates at the source code and dependency layer, not the deployed application layer. It scans your package.json, requirements.txt, or whatever dependency manifest your project uses, and it tells you which packages have known CVEs (Common Vulnerabilities and Exposures). It also does Infrastructure as Code (IaC) scanning — checking your Terraform, Kubernetes, or Dockerfile configurations for security issues — and SAST (Static Application Security Testing), which analyzes your source code for common vulnerability patterns before you run it.

What it does not check. Snyk has no visibility into your deployed app's HTTP response headers, TLS configuration, cookie flags, or DNS records. It cannot tell you whether your Content Security Policy is missing or whether your SSL certificate is using a deprecated cipher. That is simply not what it is designed to do. Snyk and ZeriFlow are complementary, not competing.

Pricing. Snyk offers a free tier with limited scanning, but meaningful team usage starts at $25/month or more depending on the plan and team size. For solo developers, the free tier is often sufficient for basic dependency scanning.

Best for. Development teams who want automated CVE monitoring on their third-party dependencies. If you are running a team of three or more people shipping code regularly, Snyk's automated pull request checks and Slack alerts for new vulnerabilities are genuinely valuable. For solo developers, npm audit covers most of the same ground for free.

OWASP ZAP

OWASP ZAP (Zed Attack Proxy) is in a different category from the other three tools on this list. It is not a misconfiguration scanner — it is an active penetration testing tool.

What it does. ZAP actively probes your application for exploitable vulnerabilities. It does not just check whether a header is missing — it sends crafted requests designed to trigger SQL injection, cross-site scripting, path traversal, and dozens of other attack types. It intercepts and modifies HTTP traffic, replays requests with malicious payloads, and attempts to actually exploit weaknesses in your app's logic. When ZAP finds something, it is because it found a real attack vector.

The learning curve. This power comes with significant complexity. ZAP requires you to configure scan targets, authentication workflows, scope boundaries, and scan policies. Running a meaningful ZAP scan on a modern single-page application — especially one with authentication — can take hours of setup and produce hundreds of results that require expert interpretation. False positives are common without proper configuration.

Pricing. ZAP is fully open source and free. There is also a commercial cloud version (ZAP as a Service) for teams who want managed scanning without self-hosting.

Best for. Security engineers and pentesters who need to validate that an application cannot be actively exploited. It is not appropriate for solo developers looking for a quick security baseline — the setup cost is too high and the results require security expertise to interpret correctly. Most vibe coders and indie developers do not need ZAP unless they are handling particularly sensitive data (healthcare, finance, legal).

Head-to-Head: Which One for Vibe Coders?

If you are a vibe coder — building with Cursor, Lovable, Bolt, or another AI-assisted tool — the real choice is between ZeriFlow and CheckVibe. Here is the honest breakdown.

Choose ZeriFlow if: - You want the most affordable option ($9.99/mo vs $16/mo) - Your stack is not heavily dependent on Supabase or Firebase - You prioritize TLS, header, and email auth depth over BaaS-specific checks - You want the most actionable fix instructions (copy-paste ready) - You want CI/CD integration to enforce security on every deploy

Choose CheckVibe if: - Your backend runs on Supabase or Firebase and you want RLS and anon key validation - You use Cursor, Claude Code, or Windsurf as your primary IDE and want in-editor scanning - The $6/mo price difference is not a factor for you

For the majority of vibe coders, ZeriFlow covers 90% of what matters at half the price. The CheckVibe premium is only worth it if you are specifically on Supabase/Firebase with an MCP-first workflow.

The Recommended Setup for Most Developers

Here is the security stack that covers 95% of developers without overcomplicating things:

1. ZeriFlow for your deployed app. Start with the free tier (3 scans/day) — it is enough to scan your production domain and a staging environment. Upgrade to Pro when you want CI/CD blocking and PDF reports. This gives you continuous coverage of your TLS, headers, cookies, DNS, and email auth.

2. `npm audit` for dependencies. Run it before every release. It is built into Node.js, it is free, and it catches the most common CVE issues in your dependency tree. No setup required.

3. Add Snyk if you have a team of 3 or more. Once you have multiple developers committing code simultaneously, automated pull request CVE checks become worth the cost. Snyk's GitHub integration is particularly smooth for this workflow.

4. OWASP ZAP once per quarter for sensitive apps. If your application handles personal data, payment information, healthcare records, or anything that would make a breach genuinely harmful, schedule a quarterly ZAP scan. Hire a security consultant to run it and interpret the results if needed.

This stack costs $9.99/mo to start and scales only when your team or risk profile grows to justify it.

Conclusion

The security scanner market in 2026 has tools for every skill level and budget — the mistake is treating them as interchangeable. Snyk watches your dependencies. OWASP ZAP attacks your app like a hacker. ZeriFlow and CheckVibe check your deployed app's configuration quickly and clearly, which is exactly what most developers actually need.

For solo developers and vibe coders: start with ZeriFlow. It runs 80+ checks on your live URL in under 60 seconds, gives you a score, and tells you exactly what to fix. The free tier is genuinely useful, and the Pro plan at $9.99/mo is the cheapest way to know your app is not leaking security configuration issues.

Run your first free scan at [zeriflow.com/free-scan](https://zeriflow.com/free-scan) — no account required, results in under a minute.