ddownload vs QuickChart
Same instrument, two spec sheets — measured, not claimed.
ddownload vs QuickChart: common questions
Which is more reliable, ddownload or QuickChart?
Both are neck-and-neck — ddownload and QuickChart 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, ddownload or QuickChart?
QuickChart has the lower median latency in our checks — ddownload responds in 365 ms versus QuickChart at 318 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 ddownload and QuickChart need an API key?
QuickChart needs no key, while ddownload requires a free API key. If you want to start calling without signup, reach for QuickChart first.
Can I call ddownload and QuickChart from the browser?
Neither sends browser-friendly CORS headers reliably, so call ddownload and QuickChart from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.
Are ddownload and QuickChart free for commercial use?
ddownload has unclear commercial terms, and QuickChart 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.