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Poptin API vs VATlayer

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

APIPoptin APIREACHABLE100VATlayerHEALTHY96
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms698286
P95 · ms17052118
AuthapiKeyapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified
Free tierFree tier — key may be required
Rate limit120 req/window · 119 remainingUnpublished
In directory since2026-10-042026-07-05
operationalpartialdownno data

Poptin API vs VATlayer: common questions

Which is more reliable, Poptin API or VATlayer?

Both are neck-and-neck — Poptin API and VATlayer 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, Poptin API or VATlayer?

VATlayer has the lower median latency in our checks — Poptin API responds in 698 ms versus VATlayer at 286 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 Poptin API and VATlayer need an API key?

Both ask you to authenticate — Poptin API uses an API key and VATlayer 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 Poptin API and VATlayer from the browser?

Only Poptin API is browser-friendly — it returns CORS headers over HTTPS. VATlayer needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Poptin API and VATlayer free for commercial use?

Poptin API has unclear commercial terms, and VATlayer 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.