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Poptin API vs Serialif Color

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

APIPoptin APIREACHABLE100Serialif ColorDYING36
Uptime · 30d
Uptime · 90d100%27.5%
Uptime · 30d100%12.1%
P50 · ms6981541
P95 · ms17053571
AuthapiKeynone
CORSyesno
HTTPSyesyes
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 Serialif Color: common questions

Which is more reliable, Poptin API or Serialif Color?

On our scheduled checks, Poptin API leads on measured uptime — Poptin API at 100% versus Serialif Color at 27.5% 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, Poptin API or Serialif Color?

Poptin API has the lower median latency in our checks — Poptin API responds in 698 ms versus Serialif Color at 1541 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 Serialif Color need an API key?

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

Can I call Poptin API and Serialif Color from the browser?

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

Are Poptin API and Serialif Color free for commercial use?

Poptin API has unclear commercial terms, and Serialif Color 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.