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Mediastack vs OpenCorporates

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

APIMediastackNEW—OpenCorporatesNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Mediastack vs OpenCorporates: common questions

Which is more reliable, Mediastack or OpenCorporates?

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

Both ask you to authenticate — Mediastack uses an API key and OpenCorporates 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 Mediastack and OpenCorporates from the browser?

Neither sends browser-friendly CORS headers reliably, so call Mediastack and OpenCorporates from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are Mediastack and OpenCorporates free for commercial use?

Mediastack has unclear commercial terms, and OpenCorporates 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.