Quandl vs Zenodo
Same instrument, two spec sheets — measured, not claimed.
Quandl vs Zenodo: common questions
Which is more reliable, Quandl or Zenodo?
On our scheduled checks, Quandl leads on measured uptime — Quandl at 100% versus Zenodo at 99.02% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Which is faster, Quandl or Zenodo?
Quandl has the lower median latency in our checks — Quandl responds in 823 ms versus Zenodo at 1698 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 Quandl and Zenodo need an API key?
Neither needs a paid key — Quandl is callable with no signup, and Zenodo is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Quandl and Zenodo from the browser?
Only Zenodo 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 Zenodo free for commercial use?
Quandl has unclear commercial terms, and Zenodo 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.