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ItsThisForThat vs Numverify

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

APIItsThisForThatHEALTHY98NumverifyHEALTHY93
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms242449
P95 · ms5551488
AuthnoneapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — key may be required
Rate limitUnpublished (docs ask you not to hammer it)Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ItsThisForThat vs Numverify: common questions

Which is more reliable, ItsThisForThat or Numverify?

Both are neck-and-neck — ItsThisForThat and Numverify 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, ItsThisForThat or Numverify?

ItsThisForThat has the lower median latency in our checks — ItsThisForThat responds in 242 ms versus Numverify at 449 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 ItsThisForThat and Numverify need an API key?

ItsThisForThat needs no key, while Numverify requires a free API key. If you want to start calling without signup, reach for ItsThisForThat first.

Can I call ItsThisForThat and Numverify from the browser?

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

Are ItsThisForThat and Numverify free for commercial use?

ItsThisForThat has unclear commercial terms, and Numverify 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.