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positionstack vs PostcodeData.nl

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

APIpositionstackHEALTHY93PostcodeData.nlHEALTHY91
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms455692
P95 · ms33281989
AuthapiKeynone
CORSnoyes
HTTPSyesno
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

positionstack vs PostcodeData.nl: common questions

Which is more reliable, positionstack or PostcodeData.nl?

Both are neck-and-neck — positionstack and PostcodeData.nl 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, positionstack or PostcodeData.nl?

positionstack has the lower median latency in our checks — positionstack responds in 455 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 positionstack and PostcodeData.nl need an API key?

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

Can I call positionstack and PostcodeData.nl from the browser?

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

Are positionstack and PostcodeData.nl free for commercial use?

positionstack 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.