Finnhub vs Twelve Data
Same instrument, two spec sheets — measured, not claimed.
Finnhub vs Twelve Data: common questions
Which is more reliable, Finnhub or Twelve Data?
On our scheduled checks, Twelve Data leads on measured uptime — Finnhub at —% versus Twelve Data at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Do Finnhub and Twelve Data need an API key?
Both ask you to authenticate — Finnhub uses an API key and Twelve Data 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 Twelve Data from the browser?
Yes — both Finnhub and Twelve Data send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.
Are Finnhub and Twelve Data free for commercial use?
Finnhub has unclear commercial terms, and Twelve Data 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.