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Userstack vs WakaTime

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

APIUserstackNEW—WakaTimeNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree public endpoints; personal data needs API key/OAuth
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Userstack vs WakaTime: common questions

Which is more reliable, Userstack or WakaTime?

On our scheduled checks, WakaTime leads on measured uptime — Userstack at —% versus WakaTime 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 WakaTime need an API key?

WakaTime needs no key, while Userstack requires a free API key. If you want to start calling without signup, reach for WakaTime first.

Can I call Userstack and WakaTime from the browser?

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

Are Userstack and WakaTime free for commercial use?

Userstack has unclear commercial terms, and WakaTime 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.