shipapis
StarSubmit an APISubmit API

Azure DevOps vs Userstack

Same instrument, two spec sheets — measured, not claimed.

APIAzure DevOpsHEALTHY97UserstackHEALTHY93
Uptime · 30d
Uptime · 90d100%99.02%
Uptime · 30d100%98.3%
P50 · ms313443
P95 · ms8693029
AuthapiKeyapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Azure DevOps vs Userstack: common questions

Which is more reliable, Azure DevOps or Userstack?

On our scheduled checks, Azure DevOps leads on measured uptime — Azure DevOps 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, Azure DevOps or Userstack?

Azure DevOps has the lower median latency in our checks — Azure DevOps responds in 313 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 Azure DevOps and Userstack need an API key?

Both ask you to authenticate — Azure DevOps 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 Azure DevOps and Userstack from the browser?

Only Userstack is browser-friendly — it returns CORS headers over HTTPS. Azure DevOps needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Azure DevOps and Userstack free for commercial use?

Azure DevOps 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.