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PostcodeData.nl vs Ziptastic

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

APIPostcodeData.nlHEALTHY91ZiptasticHEALTHY95
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms692366
P95 · ms19892018
Authnonenone
CORSyesyes
HTTPSnoyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

PostcodeData.nl vs Ziptastic: common questions

Which is more reliable, PostcodeData.nl or Ziptastic?

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

Ziptastic has the lower median latency in our checks — PostcodeData.nl responds in 692 ms versus Ziptastic at 366 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 PostcodeData.nl and Ziptastic need an API key?

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

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

Only Ziptastic 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 PostcodeData.nl and Ziptastic free for commercial use?

PostcodeData.nl has unclear commercial terms, and Ziptastic 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.