Lookup.im API vs REST Countries
Same instrument, two spec sheets — measured, not claimed.
Lookup.im API vs REST Countries: common questions
Which is more reliable, Lookup.im API or REST Countries?
On our scheduled checks, REST Countries leads on measured uptime — Lookup.im API at 97.8% versus REST Countries at 100% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Which is faster, Lookup.im API or REST Countries?
Lookup.im API has the lower median latency in our checks — Lookup.im API responds in 180 ms versus REST Countries at 274 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.
Do Lookup.im API and REST Countries need an API key?
REST Countries needs no key, while Lookup.im API requires a free API key. If you want to start calling without signup, reach for REST Countries first.
Can I call Lookup.im API and REST Countries from the browser?
Only REST Countries is browser-friendly — it returns CORS headers over HTTPS. Lookup.im API needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are Lookup.im API and REST Countries free for commercial use?
Lookup.im API 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.