IP Data API vs PostalCodes
Same instrument, two spec sheets — measured, not claimed.
IP Data API vs PostalCodes: common questions
Which is more reliable, IP Data API or PostalCodes?
Both are neck-and-neck — IP Data API and PostalCodes each measure 99.02% 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, IP Data API or PostalCodes?
IP Data API has the lower median latency in our checks — IP Data API responds in 124 ms versus PostalCodes at 1030 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 IP Data API and PostalCodes need an API key?
Neither needs a paid key — IP Data API is callable with no signup, and PostalCodes is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call IP Data API and PostalCodes from the browser?
Only IP Data API is browser-friendly — it returns CORS headers over HTTPS. PostalCodes needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are IP Data API and PostalCodes free for commercial use?
IP Data API has unclear commercial terms, and PostalCodes 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.