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OpenCorporates vs WhoisXML API IP Geolocation API

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

APIOpenCorporatesNEW—WhoisXML API IP Geolocation APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

OpenCorporates vs WhoisXML API IP Geolocation API: common questions

Which is more reliable, OpenCorporates or WhoisXML API IP Geolocation API?

On our scheduled checks, WhoisXML API IP Geolocation API leads on measured uptime — OpenCorporates at —% versus WhoisXML API IP Geolocation API 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 OpenCorporates and WhoisXML API IP Geolocation API need an API key?

Both ask you to authenticate — OpenCorporates uses an API key and WhoisXML API IP Geolocation API uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call OpenCorporates and WhoisXML API IP Geolocation API from the browser?

Only WhoisXML API IP Geolocation API is browser-friendly — it returns CORS headers over HTTPS. OpenCorporates needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are OpenCorporates and WhoisXML API IP Geolocation API free for commercial use?

OpenCorporates has unclear commercial terms, and WhoisXML API IP Geolocation API 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.