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Cartes.io vs Postali

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

APICartes.ioNEW—PostaliNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified (open-source project; user-generated maps)Unverified
Free tierFree, no API key for public readFree — no key, no signup, no monthly limit (per site)
Rate limit60 req/window · 59 remainingUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Cartes.io vs Postali: common questions

Which is more reliable, Cartes.io or Postali?

On our scheduled checks, Postali leads on measured uptime — Cartes.io at —% versus Postali 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 Cartes.io and Postali need an API key?

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

Can I call Cartes.io and Postali from the browser?

Yes — both Cartes.io and Postali send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Cartes.io and Postali free for commercial use?

Cartes.io has unclear commercial terms, and Postali 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.