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jsDelivr vs VATlayer

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

APIjsDelivrHEALTHY98VATlayerHEALTHY93
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms181473
P95 · ms10572118
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree, no keyFree tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

jsDelivr vs VATlayer: common questions

Which is more reliable, jsDelivr or VATlayer?

Both are neck-and-neck — jsDelivr and VATlayer 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 VATlayer?

jsDelivr has the lower median latency in our checks — jsDelivr responds in 181 ms versus VATlayer at 473 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 VATlayer need an API key?

jsDelivr needs no key, while VATlayer requires a free API key. If you want to start calling without signup, reach for jsDelivr first.

Can I call jsDelivr and VATlayer from the browser?

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

Are jsDelivr and VATlayer free for commercial use?

jsDelivr has unclear commercial terms, and VATlayer 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.