Twelve Data vs World Trading Data
Same instrument, two spec sheets — measured, not claimed.
Twelve Data vs World Trading Data: common questions
Which is more reliable, Twelve Data or World Trading Data?
Both are neck-and-neck — Twelve Data and World Trading Data each measure 99.02% 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, Twelve Data or World Trading Data?
Twelve Data has the lower median latency in our checks — Twelve Data responds in 253 ms versus World Trading Data at 423 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 Twelve Data and World Trading Data need an API key?
Both ask you to authenticate — Twelve Data uses an API key and World Trading 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 Twelve Data and World Trading Data from the browser?
Only Twelve Data is browser-friendly — it returns CORS headers over HTTPS. World Trading Data needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are Twelve Data and World Trading Data free for commercial use?
Twelve Data has unclear commercial terms, and World Trading 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.