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Quandl vs The Guardian

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

APIQuandlNEW—The GuardianNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree developer key — registration required
Rate limitUnpublished5000 calls/day (developer tier)
In directory since2026-07-052026-07-05
operationalpartialdownno data

Quandl vs The Guardian: common questions

Which is more reliable, Quandl or The Guardian?

On our scheduled checks, The Guardian leads on measured uptime — Quandl at —% versus The Guardian 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 Quandl and The Guardian need an API key?

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

Can I call Quandl and The Guardian from the browser?

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

Are Quandl and The Guardian free for commercial use?

Quandl has unclear commercial terms, and The Guardian 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.