Kaggle vs Quandl
Same instrument, two spec sheets — measured, not claimed.
Kaggle vs Quandl: common questions
Which is more reliable, Kaggle or Quandl?
Both are neck-and-neck — Kaggle and Quandl 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, Kaggle or Quandl?
Kaggle has the lower median latency in our checks — Kaggle responds in 250 ms versus Quandl at 823 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 Kaggle and Quandl need an API key?
Quandl needs no key, while Kaggle requires a free API key. If you want to start calling without signup, reach for Quandl first.
Can I call Kaggle and Quandl from the browser?
Only Kaggle 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 Kaggle and Quandl free for commercial use?
Kaggle has unclear commercial terms, and Quandl 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.