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EmailRep vs FingerprintJS Pro

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

APIEmailRepNEW—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

EmailRep vs FingerprintJS Pro: common questions

Which is more reliable, EmailRep or FingerprintJS Pro?

On our scheduled checks, FingerprintJS Pro leads on measured uptime — EmailRep 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 EmailRep and FingerprintJS Pro need an API key?

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

Can I call EmailRep and FingerprintJS Pro from the browser?

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

Are EmailRep and FingerprintJS Pro free for commercial use?

EmailRep 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.