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?
On our scheduled checks, IP Data API leads on measured uptime — IP Data API at 99.44% versus PostalCodes at 80.9% 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, IP Data API or PostalCodes?
IP Data API has the lower median latency in our checks — IP Data API responds in 148 ms versus PostalCodes at 968 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.