OWASP ZAP vs KeyDrift
The free DAST everyone should run once — actively maintained by the community.
Open-source dynamic scanner with active/passive modes.
This page compares the two honestly: strengths credited specifically, differences traced to structure rather than quality, and a decision rule at the end. Verified August 2026.
What OWASP ZAP does well
Free/open-source forever.,Active community/rules.,CI-scriptable baseline scans.
- Targeted applications.
- Passive+active scanners.
- As-run.
The gap KeyDrift fills: the deployed bundle
The structural difference is the artifact under inspection. OWASP ZAP watches inputs to the build — commits, branches, configuration. KeyDrift watches the output: the HTML and JavaScript a browser downloads from the live URL. Build-time substitution, agent-written client calls and streamed payloads live in that output and in none of the inputs, which is why a green OWASP ZAP report and a leaking deployment can coexist without anyone being wrong.
- Fetched-and-diffed scanning of live URLs, including chunks reachable only through route manifests.
- Streamed server data (
self.__next_f.push,window.__NUXT__) read as carefully as chunk files. - Calibrated dispositions: Supabase anon keys, publishable keys and Firebase web keys recognised as public-by-design instead of reported as leaks.
- Drift transitions — created, regressed, resolved — so a reintroduced key alerts as a regression, not as news.
Feature-by-feature
- Surfaces scanned. Download/deploy. versus KeyDrift: deployed web artifacts fetched live, or pasted bundle source for anything behind a login.
- Detection approach. budget-limited programs starting DAST. versus KeyDrift: 21 secret detectors across 13 providers with placeholder rejection, alphabet-normalised entropy, payload decoding and a confidence floor below which matches are dropped rather than caveated.
- Change over time. ZAP hunts vulnerability classes; credential inventory diffing remains unaddressed there — add the missing lens cheaply alongside. versus KeyDrift: scheduled scans diffed into created/regressed/resolved with alert routing to email, Slack, Discord and webhooks.
- Getting started. undefined versus KeyDrift: paste a URL at /scan — free, no account — or paste source for private surfaces.
Side-by-side
Every cell below states a specific capability. Where OWASP ZAP documents more detail than fits here, follow their docs; where KeyDrift claims something, it is verifiable in a two-minute free scan.
| Capability | OWASP ZAP | KeyDrift |
| --- | --- | --- |
| Primary surfaces | Download/deploy. | Deployed web artifacts fetched live: HTML, all chunks (incl. route-manifest-only), streamed payloads |
| Build-time substitution (NEXT_PUBLIC_/VITE_) | Not a documented capability | Detected in served output — exactly where it lands |
| Hydration payloads (self.__next_f.push, window.__NUXT__) | Vulnerability-focused tooling; credential payload reading not documented | Read as carefully as chunk files |
| Public-vs-secret calibration | Not applicable to scope | Dispositions built-in: anon/publishable/Firebase-web reported informational, sample keys rejected by name |
| Change over time | ZAP hunts vulnerability classes; credential inventory diffing remains unaddressed there — add the missing lens cheaply alongside. | Scheduled scans diffed into created/regressed/resolved; regression alerts name comebacks |
| Alert routing | ZAP hunts vulnerability classes; credential inventory diffing remains unaddressed there — add the missing lens cheaply alongside. | Email · Slack · Discord · raw webhooks with per-destination severity thresholds |
| Getting started | undefined | Paste any URL at keydrift.dev/scan — free, no account; paste-source mode for behind-login surfaces |
| Privacy of findings | Varies by vendor | Masks + salted fingerprints only; no column anywhere can hold a live secret |_Cells describing OWASP ZAP summarize their public documentation as of the verified date above._
Where each one wins
- OWASP ZAP wins when undefined
- KeyDrift wins when the question is “what credentials can strangers retrieve from this deployment right now?” — live fetching, calibrated dispositions, and regression alerting without agents installed.
Switching from OWASP ZAP
Nobody rip-and-replaces OWASP ZAP, and this page never asks for that. The realistic switch is additive: keep OWASP ZAP as the system of record for its domain, give KeyDrift the URLs you serve to strangers, and let drift alerting catch the reintroductions that neither tooling nor memory catches today.
undefined
Decision rule
- Keeping OWASP ZAP for its documented strengths makes sense — it earns them.
- Add KeyDrift when deployment truth matters: post-build artifacts, preview URLs, and reintroduction watch on a schedule.
_Compared against OWASP ZAP documentation and pricing as verified August 2026. Capabilities change; check their site._ OWSP Foundation / community and associated marks are trademarks of OWSP Foundation / community, referenced for identification and descriptive comparison.
Bottom line: choose OWASP ZAP for its category strengths without hesitation. Choose KeyDrift the moment someone asks what your bundles expose — then keep both, because they were never competing for the same job.
How teams actually run OWASP ZAP and KeyDrift together
In practice the pairing is boring in the best way: OWASP ZAP stays authoritative for whatever it was built to do, KeyDrift runs on a schedule against every public deployment, and alerts route into the same channels your team already reads. Nothing is migrated; nothing is turned off. The only new habit is reading one more alert type — and that one arrives masked, classified, and linked to a fix guide.
What to verify on their site before deciding
- Their current scanned-surface list (Download/deploy.) — confirm against your stack.
- Whether drift/change-detection over time is part of their product or a roadmap item.
- Free-tier shape: what you can prove about YOUR deployment before any purchase conversation.
Common questions
Is OWASP ZAP bad at security?
No — the page credits specific strengths above. The difference is which artifact gets inspected, not effort or care.
Pricing comparison?
Their list pricing lives on their site and changes; ours sits on the plans page with findings visible free at every tier. Numbers go stale; philosophy does not.
Run a free scan at keydrift.dev/scan — paste a URL or the bundle source itself, no account. Findings arrive masked, with the exact chunk they live in.