ip-api.com vs NetworkCalc
Same instrument, two spec sheets — measured, not claimed.
ip-api.com vs NetworkCalc: common questions
Which is more reliable, ip-api.com or NetworkCalc?
Both are neck-and-neck — ip-api.com and NetworkCalc 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-api.com or NetworkCalc?
ip-api.com has the lower median latency in our checks — ip-api.com responds in 33 ms versus NetworkCalc at 448 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-api.com and NetworkCalc need an API key?
Neither needs a paid key — ip-api.com is callable with no signup, and NetworkCalc is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call ip-api.com and NetworkCalc from the browser?
Only NetworkCalc is browser-friendly — it returns CORS headers over HTTPS. ip-api.com needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are ip-api.com and NetworkCalc free for commercial use?
ip-api.com has unclear commercial terms, and NetworkCalc 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.