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ipapi.co vs PostcodeData.nl

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

APIipapi.coDYING35PostcodeData.nlHEALTHY91
Uptime · 30d
Uptime · 90d1.0%100%
Uptime · 30d1.7%100%
P50 · ms440692
P95 · ms4401989
Authnonenone
CORSyesyes
HTTPSyesno
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — quota not published; returns 429 when exceededFree — limits not published
Rate limitUnpublished (429 Quota exceeded)Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ipapi.co vs PostcodeData.nl: common questions

Which is more reliable, ipapi.co or PostcodeData.nl?

On our scheduled checks, PostcodeData.nl leads on measured uptime — ipapi.co at 1.0% versus PostcodeData.nl at 100% 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, ipapi.co or PostcodeData.nl?

ipapi.co has the lower median latency in our checks — ipapi.co responds in 440 ms versus PostcodeData.nl at 692 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 ipapi.co and PostcodeData.nl need an API key?

Neither needs a paid key — ipapi.co is callable with no signup, and PostcodeData.nl is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call ipapi.co and PostcodeData.nl from the browser?

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

Are ipapi.co and PostcodeData.nl free for commercial use?

ipapi.co has unclear commercial terms, and PostcodeData.nl 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.