jsDelivr vs SLA Uptime Calculator
Same instrument, two spec sheets — measured, not claimed.
jsDelivr vs SLA Uptime Calculator: common questions
Which is more reliable, jsDelivr or SLA Uptime Calculator?
Both are neck-and-neck — jsDelivr 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, jsDelivr or SLA Uptime Calculator?
jsDelivr has the lower median latency in our checks — jsDelivr responds in 181 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 jsDelivr and SLA Uptime Calculator need an API key?
Neither needs a paid key — jsDelivr is callable with no signup, and SLA Uptime Calculator is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call jsDelivr and SLA Uptime Calculator from the browser?
Yes — both jsDelivr and SLA Uptime Calculator send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.
Are jsDelivr and SLA Uptime Calculator free for commercial use?
jsDelivr 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.