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Poptin API vs RSQ API

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

APIPoptin APIREACHABLE100RSQ APIHEALTHY93
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms698172
P95 · ms17054248
AuthapiKeynone
CORSyesyes
HTTPSyesno
Card requirednono
Commercial useunclearunclear
Data licenseUnverified
Free tierFree — limits not published
Rate limit120 req/window · 119 remainingUnpublished
In directory since2026-10-042026-07-05
operationalpartialdownno data

Poptin API vs RSQ API: common questions

Which is more reliable, Poptin API or RSQ API?

Both are neck-and-neck — Poptin API and RSQ API 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 RSQ API?

RSQ API has the lower median latency in our checks — Poptin API responds in 698 ms versus RSQ API at 172 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 RSQ API need an API key?

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

Can I call Poptin API and RSQ API from the browser?

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

Are Poptin API and RSQ API free for commercial use?

Poptin API has unclear commercial terms, and RSQ 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.