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Sheetsu vs staffSign

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

APISheetsuNEW—staffSignNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree tier — API key required
Rate limit90 req/window · 89 remainingUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Sheetsu vs staffSign: common questions

Which is more reliable, Sheetsu or staffSign?

On our scheduled checks, staffSign leads on measured uptime — Sheetsu at —% versus staffSign 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 Sheetsu and staffSign need an API key?

Both ask you to authenticate — Sheetsu uses an API key and staffSign 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 Sheetsu and staffSign from the browser?

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

Are Sheetsu and staffSign free for commercial use?

Sheetsu has unclear commercial terms, and staffSign 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.