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Quandl vs Wikidata

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

APIQuandlNEW—WikidataNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Quandl vs Wikidata: common questions

Which is more reliable, Quandl or Wikidata?

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

Neither needs a paid key — Quandl is callable with no signup, and Wikidata is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Quandl and Wikidata from the browser?

Neither sends browser-friendly CORS headers reliably, so call Quandl and Wikidata from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are Quandl and Wikidata free for commercial use?

Quandl has unclear commercial terms, and Wikidata 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.