Finnhub vs Marketstack
Same instrument, two spec sheets — measured, not claimed.
Finnhub vs Marketstack: common questions
Which is more reliable, Finnhub or Marketstack?
Both are neck-and-neck — Finnhub and Marketstack 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, Finnhub or Marketstack?
Finnhub has the lower median latency in our checks — Finnhub responds in 157 ms versus Marketstack at 470 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 Finnhub and Marketstack need an API key?
Both ask you to authenticate — Finnhub uses an API key and Marketstack uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.
Can I call Finnhub and Marketstack from the browser?
Only Finnhub is browser-friendly — it returns CORS headers over HTTPS. Marketstack needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are Finnhub and Marketstack free for commercial use?
Finnhub has unclear commercial terms, and Marketstack 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.