Userstack vs ipify
Same instrument, two spec sheets — measured, not claimed.
Userstack vs ipify: common questions
Which is more reliable, Userstack or ipify?
On our scheduled checks, ipify leads on measured uptime — Userstack at —% versus ipify 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 Userstack and ipify 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 Userstack and ipify from the browser?
Yes — both Userstack and ipify 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 Userstack and ipify free for commercial use?
Userstack has unclear commercial terms, and ipify allows commercial use on its free tier. 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.