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Postali vs PostcodeData.nl

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

APIPostaliNEW—PostcodeData.nlNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesno
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — no key, no signup, no monthly limit (per site)Free — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Postali vs PostcodeData.nl: common questions

Which is more reliable, Postali or PostcodeData.nl?

On our scheduled checks, PostcodeData.nl leads on measured uptime — Postali at —% versus PostcodeData.nl at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do Postali and PostcodeData.nl need an API key?

Neither needs a paid key — Postali 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 Postali and PostcodeData.nl from the browser?

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

Postali 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.