CompanyData.com vs Yahoo Finance Chart
Same instrument, two spec sheets — measured, not claimed.
CompanyData.com vs Yahoo Finance Chart: common questions
Which is more reliable, CompanyData.com or Yahoo Finance Chart?
On our scheduled checks, Yahoo Finance Chart leads on measured uptime — CompanyData.com at 49.0% versus Yahoo Finance Chart at 100% 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, CompanyData.com or Yahoo Finance Chart?
Yahoo Finance Chart has the lower median latency in our checks — CompanyData.com responds in 243 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 CompanyData.com and Yahoo Finance Chart need an API key?
Neither needs a paid key — CompanyData.com is callable with no signup, and Yahoo Finance Chart is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call CompanyData.com and Yahoo Finance Chart from the browser?
Only CompanyData.com is browser-friendly — it returns CORS headers over HTTPS. Yahoo Finance Chart needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are CompanyData.com and Yahoo Finance Chart free for commercial use?
CompanyData.com 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.