Ducks Unlimited vs Postcodes.io
Same instrument, two spec sheets — measured, not claimed.
Ducks Unlimited vs Postcodes.io: common questions
Which is more reliable, Ducks Unlimited or Postcodes.io?
On our scheduled checks, Postcodes.io leads on measured uptime — Ducks Unlimited at 99.02% versus Postcodes.io at 100% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Which is faster, Ducks Unlimited or Postcodes.io?
Postcodes.io has the lower median latency in our checks — Ducks Unlimited responds in 832 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 Ducks Unlimited and Postcodes.io need an API key?
Neither needs a paid key — Ducks Unlimited 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 Ducks Unlimited and Postcodes.io from the browser?
Yes — both Ducks Unlimited 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 Ducks Unlimited and Postcodes.io free for commercial use?
Ducks Unlimited has unclear commercial terms, 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.