Best Vulnerability Scanners for Vibe-Coded Apps in 2026
SimplyScan, OWASP ZAP, Snyk, Semgrep, or Burp Suite? An honest comparison of vulnerability scanners for people who built their app with AI and want to know if it is safe.
By Daniel A · Kraftwire Software
· 7 min readKey Takeaway
The best vulnerability scanner for a vibe-coded app is the one that matches how the app was built and who is running the scan. SimplyScan is purpose-built for deployed AI-built apps and readable by non-experts, OWASP ZAP offers free depth if you will invest the learning time, Snyk owns dependency risk, Semgrep covers source-level rules, and Burp Suite is for professional testing. Most solo builders should start with a deployed-app scan and a dependency check, in that order.
Why Vibe-Coded Apps Need a Different Lens
An app generated by Lovable, Bolt, or an AI IDE fails in predictable ways: API keys in the frontend bundle, database tables without row-level security, validation that exists only in the browser, security headers that were never configured. The OWASP Top 10 for AI apps maps this landscape well · AI-built apps cluster heavily in a few categories.
That changes what "best scanner" means. Traditional scanners were designed for security teams auditing hand-built software. If you built your app by prompting, two things matter more than raw detection power: whether the scanner looks for the failure modes AI tools actually produce, and whether you can understand the report without a security background.
Scanner Categories in One Minute
- DAST (dynamic analysis): probes the running app from outside, the way an attacker would
- SAST (static analysis): reads your source code for dangerous patterns
- SCA (software composition analysis): checks your dependencies against known vulnerabilities
- Deployed-app scanning: checks the live app's configuration, exposure, and platform-specific risks
No single tool covers everything. The honest framing is which combination you need, and which tools you can realistically operate.
The Contenders
SimplyScan
Our own tool, so judge this section accordingly · the positioning is deliberately narrow. SimplyScan scans deployed apps with 51+ checks across 14 categories, tuned to what AI builders get wrong. The free tier covers exposed secrets, frontend issues, Supabase RLS, and speed. Reports are written in plain English with fix instructions, which matters when the person reading them has never opened a security tool before (how to read a scan report walks through an example).
The Pro report costs $14.99 one-time per scan · no subscription · and includes two free rescans within 14 days plus GitHub repo scanning to catch issues in the source as well as the deployment. The free vs Pro comparison shows exactly where the line sits.
What it does not do: SimplyScan is not an attack proxy. It will not fuzz your business logic or chain exploits the way a skilled human with Burp does. It is security hygiene for deployed apps, done fast and explained clearly.
OWASP ZAP
Free, open source, and genuinely powerful. ZAP is a full DAST tool: it spiders your app, actively probes endpoints, fuzzes parameters, and finds real vulnerabilities that configuration-level scanning cannot see.
The honest tradeoffs: the learning curve is steep, findings are phrased for security practitioners, and an active scan is aggressive enough that you should never point it at production without understanding what it does · run it against a staging environment. If you are willing to invest a weekend learning it, ZAP is the most capable free option on this list.
Snyk
Snyk's core strength is SCA: it knows which of your dependencies have known vulnerabilities and often opens fix pull requests automatically. It has expanded into code and infrastructure scanning, but dependency risk remains where it shines. It wants to live in your repo and CI pipeline, which is exactly right for teams and a bit of setup for a solo builder. It will not tell you that your RLS is missing or your headers are absent · that is the wrong layer for it.
Semgrep
Semgrep is a fast, developer-friendly SAST engine: rules that match dangerous code patterns across your source. It is excellent in CI, supports custom rules, and the open-source engine is free. The tradeoffs: you need access to the source, result quality depends on which rulesets you enable, and it knows nothing about your deployed configuration. Best for developers who want security checks as part of the build rather than as a separate ritual.
Burp Suite
Burp is the standard toolkit of professional penetration testers: an intercepting proxy plus scanning and manipulation tools that reward expertise. The Community edition is limited; the paid edition is built for people who test applications for a living. For a solo builder, Burp is overkill in the precise sense: its power is only unlocked by a skilled human driving it. If you find yourself wanting Burp, what you probably want is the person who operates it.
Comparison Table
- SimplyScan · deployed-app scan · runs against a live URL (GitHub repo on Pro) · free tier, $14.99 one-time Pro · learning curve: minutes · best for AI-built apps and non-experts
- OWASP ZAP · DAST · runs against a running app (staging) · free · learning curve: steep · best for deep testing by willing learners
- Snyk · SCA and more · runs against your repo and CI · free tier, paid plans · learning curve: moderate · best for dependency risk and teams
- Semgrep · SAST · runs against source code · free engine, paid platform · learning curve: moderate · best for CI-integrated code checks
- Burp Suite · proxy and DAST · runs against a running app · limited free, paid Pro · learning curve: steep · best for professional testers
When You Need a Human Pentest
Every tool on this list automates pattern detection. None of them reasons about your business logic: whether a coupon can be applied twice, whether user A can act on user B's records through a forgotten endpoint, whether your password reset flow can be chained into account takeover. That is human work.
If your app handles payments, sensitive personal data, or enterprise customers, budget for a professional penetration test on top of automated scanning · not instead of it. We wrote up the differences honestly in SimplyScan vs penetration testing; the short version is that scanners are your weekly hygiene and a pentest is your periodic deep exam.
What About Compliance?
A scanner does not make you SOC 2 compliant, and no vendor should tell you otherwise. Compliance frameworks are about controls, processes, and evidence collected over time; vulnerability scanning is one control among dozens. If customers are starting to ask about it, read SOC 2 compliant infrastructure to understand the actual scope before buying tools for it.
Who Should Use What
- You shipped a Lovable, Bolt, or Cursor app and are not a security person: start with SimplyScan's free scan, upgrade to the Pro report if the app handles real users
- You have a staging environment and want maximum free depth: learn ZAP, and add Snyk for dependencies
- You have CI/CD and a team: Semgrep and Snyk in the pipeline, plus a deployed-app scan on every release
- You handle money, health data, or enterprise contracts: all of the hygiene above, plus a scheduled human pentest
These tools compose rather than compete. The failure mode to avoid is not picking the wrong scanner · it is running none of them because the choice felt overwhelming.
Find out where your app stands right now with a free security scan · it takes about two minutes.