shipapis
StarSubmit an APISubmit API

What3Words vs Zippopotam.us

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

APIWhat3WordsNEW—Zippopotam.usNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnoyes
HTTPSyesyes
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

What3Words vs Zippopotam.us: common questions

Which is more reliable, What3Words or Zippopotam.us?

On our scheduled checks, Zippopotam.us leads on measured uptime — What3Words at —% versus Zippopotam.us 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 What3Words and Zippopotam.us need an API key?

Zippopotam.us needs no key, while What3Words requires a free API key. If you want to start calling without signup, reach for Zippopotam.us first.

Can I call What3Words and Zippopotam.us from the browser?

Only Zippopotam.us is browser-friendly — it returns CORS headers over HTTPS. What3Words needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are What3Words and Zippopotam.us free for commercial use?

What3Words has unclear commercial terms, and Zippopotam.us 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.