Marketstack vs Yahoo Finance Chart
Same instrument, two spec sheets — measured, not claimed.
Marketstack vs Yahoo Finance Chart: common questions
Which is more reliable, Marketstack or Yahoo Finance Chart?
Both are neck-and-neck — Marketstack and Yahoo Finance Chart 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, Marketstack or Yahoo Finance Chart?
Yahoo Finance Chart has the lower median latency in our checks — Marketstack responds in 470 ms versus Yahoo Finance Chart at 167 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 Marketstack and Yahoo Finance Chart need an API key?
Yahoo Finance Chart needs no key, while Marketstack requires a free API key. If you want to start calling without signup, reach for Yahoo Finance Chart first.
Can I call Marketstack and Yahoo Finance Chart from the browser?
Neither sends browser-friendly CORS headers reliably, so call Marketstack and Yahoo Finance Chart from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.
Are Marketstack and Yahoo Finance Chart free for commercial use?
Marketstack has unclear commercial terms, and Yahoo Finance Chart 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.