ipify vs Userstack
Same instrument, two spec sheets — measured, not claimed.
ipify vs Userstack: common questions
Which is more reliable, ipify or Userstack?
Both are neck-and-neck — ipify and Userstack 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, ipify or Userstack?
ipify has the lower median latency in our checks — ipify responds in 149 ms versus Userstack at 443 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 ipify and Userstack need an API key?
ipify needs no key, while Userstack requires a free API key. If you want to start calling without signup, reach for ipify first.
Can I call ipify and Userstack from the browser?
Yes — both ipify and Userstack 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 ipify and Userstack free for commercial use?
ipify allows commercial use on its free tier, and Userstack 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.