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Gladia vs Lookup.im API

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

APIGladiaHEALTHY76Lookup.im APIHEALTHY84
Uptime · 30d
Uptime · 90d100%99.04%
Uptime · 30d100%100%
P50 · ms10341128
P95 · ms41213581
AuthapiKeyapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key may be required for productionFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Gladia vs Lookup.im API: common questions

Which is more reliable, Gladia or Lookup.im API?

On our scheduled checks, Gladia leads on measured uptime — Gladia at 100% versus Lookup.im API at 99.04% 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, Gladia or Lookup.im API?

Gladia has the lower median latency in our checks — Gladia responds in 1034 ms versus Lookup.im API at 1128 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 Gladia and Lookup.im API need an API key?

Both ask you to authenticate — Gladia uses an API key and Lookup.im 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 Gladia and Lookup.im API from the browser?

Only Gladia 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 Gladia and Lookup.im API free for commercial use?

Gladia has unclear commercial terms, and Lookup.im 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.