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Quandl vs Voidly

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

APIQuandlNEW—VoidlyNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedCC BY 4.0
Free tierFree — limits not publishedFree (keyless data endpoints; Hydra ML endpoints need a key)
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Quandl vs Voidly: common questions

Which is more reliable, Quandl or Voidly?

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

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

Can I call Quandl and Voidly from the browser?

Only Voidly 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 Voidly free for commercial use?

Quandl has unclear commercial terms, and Voidly allows commercial use on its free tier. 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.