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adresse.data.gouv.fr vs Postcodes.io

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

APIadresse.data.gouv.frHEALTHY88Postcodes.ioHEALTHY100
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms85333
P95 · ms2310328
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useyesunclear
Data licenseLicence Ouverte / ODbL (Base Adresse Nationale)Service MIT-licensed; postcode data license unverified
Free tierFree, no API keyFree — no key required
Rate limit50 requests/second per IP (documented)Unpublished (no key; fair use)
In directory since2026-07-052026-07-05
operationalpartialdownno data

adresse.data.gouv.fr vs Postcodes.io: common questions

Which is more reliable, adresse.data.gouv.fr or Postcodes.io?

Both are neck-and-neck — adresse.data.gouv.fr and Postcodes.io each measure 100% 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.

Which is faster, adresse.data.gouv.fr or Postcodes.io?

Postcodes.io has the lower median latency in our checks — adresse.data.gouv.fr responds in 853 ms versus Postcodes.io at 33 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do adresse.data.gouv.fr and Postcodes.io need an API key?

Neither needs a paid key — adresse.data.gouv.fr is callable with no signup, and Postcodes.io is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call adresse.data.gouv.fr and Postcodes.io from the browser?

Yes — both adresse.data.gouv.fr and Postcodes.io 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 adresse.data.gouv.fr and Postcodes.io free for commercial use?

adresse.data.gouv.fr allows commercial use on its free tier, and Postcodes.io 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.