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Callook.info vs Voidly

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

APICallook.infoHEALTHY94VoidlyHEALTHY78
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms4371238
P95 · ms11563894
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverified (data from public FCC ULS records)CC BY 4.0
Free tierFree — limits not publishedFree (keyless data endpoints; Hydra ML endpoints need a key)
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Callook.info vs Voidly: common questions

Which is more reliable, Callook.info or Voidly?

Both are neck-and-neck — Callook.info and Voidly each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, Callook.info or Voidly?

Callook.info has the lower median latency in our checks — Callook.info responds in 437 ms versus Voidly at 1238 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 Callook.info and Voidly need an API key?

Neither needs a paid key — Callook.info is callable with no signup, and Voidly is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Callook.info and Voidly from the browser?

Yes — both Callook.info and Voidly send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Callook.info and Voidly free for commercial use?

Callook.info has unclear commercial terms, and Voidly 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.