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CountryStateCity vs Zipcodestack

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

APICountryStateCityDEAD0ZipcodestackDEAD0
Uptime · 30d
Uptime · 90d0.0%0.0%
Uptime · 30d0.0%0.0%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

CountryStateCity vs Zipcodestack: common questions

Which is more reliable, CountryStateCity or Zipcodestack?

Both are neck-and-neck — CountryStateCity and Zipcodestack each measure 0.0% 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.

Do CountryStateCity and Zipcodestack need an API key?

Both ask you to authenticate — CountryStateCity uses an API key and Zipcodestack uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call CountryStateCity and Zipcodestack from the browser?

Yes — both CountryStateCity and Zipcodestack 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 CountryStateCity and Zipcodestack free for commercial use?

CountryStateCity has unclear commercial terms, and Zipcodestack 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.