Exchangerate.host vs Twelve Data
Same instrument, two spec sheets — measured, not claimed.
Exchangerate.host vs Twelve Data: common questions
Which is more reliable, Exchangerate.host or Twelve Data?
Both are neck-and-neck — Exchangerate.host and Twelve 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, Exchangerate.host or Twelve Data?
Twelve Data has the lower median latency in our checks — Exchangerate.host responds in 398 ms versus Twelve Data at 253 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 Exchangerate.host and Twelve Data need an API key?
Exchangerate.host needs no key, while Twelve Data requires a free API key. If you want to start calling without signup, reach for Exchangerate.host first.
Can I call Exchangerate.host and Twelve Data from the browser?
Yes — both Exchangerate.host 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 Exchangerate.host and Twelve Data free for commercial use?
Exchangerate.host 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.