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Piloterr vs SLA Uptime Calculator

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

APIPiloterrHEALTHY91SLA Uptime CalculatorHEALTHY82
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms6351373
P95 · ms17302741
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?

Both are neck-and-neck — Piloterr and SLA Uptime Calculator each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, Piloterr or SLA Uptime Calculator?

Piloterr has the lower median latency in our checks — Piloterr responds in 635 ms versus SLA Uptime Calculator at 1373 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 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.