Piloterr vs Userstack
Same instrument, two spec sheets — measured, not claimed.
Piloterr vs Userstack: common questions
Which is more reliable, Piloterr or Userstack?
On our scheduled checks, Piloterr leads on measured uptime — Piloterr 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, Piloterr or Userstack?
Userstack has the lower median latency in our checks — Piloterr responds in 635 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 Piloterr and Userstack need an API key?
Both ask you to authenticate — Piloterr uses an API key and Userstack uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.
Can I call Piloterr and Userstack from the browser?
Only Userstack is browser-friendly — it returns CORS headers over HTTPS. Piloterr needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are Piloterr and Userstack free for commercial use?
Piloterr 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.