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Cartes.io vs Ducks Unlimited

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

APICartes.ioNEW—Ducks UnlimitedNEW—
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 — limits not published
Rate limit60 req/window · 59 remainingUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Cartes.io vs Ducks Unlimited: common questions

Which is more reliable, Cartes.io or Ducks Unlimited?

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

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

Can I call Cartes.io and Ducks Unlimited from the browser?

Yes — both Cartes.io and Ducks Unlimited 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 Ducks Unlimited free for commercial use?

Cartes.io has unclear commercial terms, and Ducks Unlimited 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.