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Piloterr vs SLA Uptime Calculator

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

APIPiloterrNEW—SLA Uptime CalculatorNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Piloterr vs SLA Uptime Calculator: common questions

Which is more reliable, Piloterr or SLA Uptime Calculator?

On our scheduled checks, SLA Uptime Calculator leads on measured uptime — Piloterr at —% versus SLA Uptime Calculator 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 Piloterr and SLA Uptime Calculator need an API key?

SLA Uptime Calculator needs no key, while Piloterr requires a free API key. If you want to start calling without signup, reach for SLA Uptime Calculator first.

Can I call Piloterr and SLA Uptime Calculator from the browser?

Only SLA Uptime Calculator 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 SLA Uptime Calculator free for commercial use?

Piloterr has unclear commercial terms, and SLA Uptime Calculator 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.