DownStatus vs Userstack
Same instrument, two spec sheets — measured, not claimed.
DownStatus vs Userstack: common questions
Which is more reliable, DownStatus or Userstack?
On our scheduled checks, Userstack leads on measured uptime — DownStatus at 60.8% 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, DownStatus or Userstack?
Userstack has the lower median latency in our checks — DownStatus responds in 589 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 DownStatus and Userstack need an API key?
DownStatus needs no key, while Userstack requires a free API key. If you want to start calling without signup, reach for DownStatus first.
Can I call DownStatus and Userstack from the browser?
Only Userstack is browser-friendly — it returns CORS headers over HTTPS. DownStatus needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are DownStatus and Userstack free for commercial use?
DownStatus 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.