OpenCorporates vs REST Countries
Same instrument, two spec sheets — measured, not claimed.
OpenCorporates vs REST Countries: common questions
Which is more reliable, OpenCorporates or REST Countries?
On our scheduled checks, REST Countries leads on measured uptime — OpenCorporates at —% versus REST Countries 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 REST Countries need an API key?
REST Countries needs no key, while OpenCorporates requires a free API key. If you want to start calling without signup, reach for REST Countries first.
Can I call OpenCorporates and REST Countries from the browser?
Only REST Countries 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 REST Countries free for commercial use?
OpenCorporates has unclear commercial terms, and REST Countries allows commercial use on its free tier. 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.