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FingerprintJS Pro vs Portscan

Same instrument, two spec sheets — measured, not claimed.

APIFingerprintJS ProNEW—PortscanNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

FingerprintJS Pro vs Portscan: common questions

Which is more reliable, FingerprintJS Pro or Portscan?

On our scheduled checks, Portscan leads on measured uptime — FingerprintJS Pro at —% versus Portscan at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do FingerprintJS Pro and Portscan need an API key?

Portscan needs no key, while FingerprintJS Pro requires a free API key. If you want to start calling without signup, reach for Portscan first.

Can I call FingerprintJS Pro and Portscan from the browser?

Yes — both FingerprintJS Pro and Portscan send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are FingerprintJS Pro and Portscan free for commercial use?

FingerprintJS Pro has unclear commercial terms, and Portscan has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.