ipify vs Userstack
Same instrument, two spec sheets — measured, not claimed.
ipify vs Userstack: common questions
Which is more reliable, ipify or Userstack?
On our scheduled checks, Userstack leads on measured uptime — ipify at —% versus Userstack at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
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.