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Authentication vs FingerprintJS Pro

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

APIAuthenticationNEW—FingerprintJS ProNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Authentication vs FingerprintJS Pro: common questions

Which is more reliable, Authentication or FingerprintJS Pro?

On our scheduled checks, FingerprintJS Pro leads on measured uptime — Authentication at —% versus FingerprintJS Pro 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 Authentication and FingerprintJS Pro need an API key?

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

Can I call Authentication and FingerprintJS Pro from the browser?

Only FingerprintJS Pro is browser-friendly — it returns CORS headers over HTTPS. Authentication needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Authentication and FingerprintJS Pro free for commercial use?

Authentication has unclear commercial terms, and FingerprintJS Pro 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.