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EmailRep vs Portscan

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

APIEmailRepNEW—PortscanNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

EmailRep vs Portscan: common questions

Which is more reliable, EmailRep or Portscan?

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

Neither needs a paid key — EmailRep is callable with no signup, and Portscan is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call EmailRep and Portscan from the browser?

Only Portscan 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 Portscan free for commercial use?

EmailRep 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.