InternetDB API vs Userstack
Same instrument, two spec sheets — measured, not claimed.
InternetDB API vs Userstack: common questions
Which is more reliable, InternetDB API or Userstack?
On our scheduled checks, InternetDB API leads on measured uptime — InternetDB API at 100% versus Userstack at 99.02% 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, InternetDB API or Userstack?
InternetDB API has the lower median latency in our checks — InternetDB API responds in 133 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 InternetDB API and Userstack need an API key?
InternetDB API needs no key, while Userstack requires a free API key. If you want to start calling without signup, reach for InternetDB API first.
Can I call InternetDB API and Userstack from the browser?
Yes — both InternetDB API 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 InternetDB API and Userstack free for commercial use?
InternetDB API has unclear commercial terms, 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.