Twelve Data vs ValueRay
Same instrument, two spec sheets — measured, not claimed.
Twelve Data vs ValueRay: common questions
Which is more reliable, Twelve Data or ValueRay?
On our scheduled checks, ValueRay leads on measured uptime — Twelve Data at —% versus ValueRay 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 Twelve Data and ValueRay need an API key?
ValueRay needs no key, while Twelve Data requires a free API key. If you want to start calling without signup, reach for ValueRay first.
Can I call Twelve Data and ValueRay from the browser?
Yes — both Twelve Data and ValueRay 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 Twelve Data and ValueRay free for commercial use?
Twelve Data has unclear commercial terms, and ValueRay 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.