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Scrnify vs SLA Uptime Calculator

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

APIScrnifyHEALTHY88SLA Uptime CalculatorHEALTHY82
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms9271373
P95 · ms17422741
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

Scrnify vs SLA Uptime Calculator: common questions

Which is more reliable, Scrnify or SLA Uptime Calculator?

Both are neck-and-neck — Scrnify 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, Scrnify or SLA Uptime Calculator?

Scrnify has the lower median latency in our checks — Scrnify responds in 927 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 Scrnify and SLA Uptime Calculator need an API key?

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

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

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

Are Scrnify and SLA Uptime Calculator free for commercial use?

Scrnify 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.