Markbase vs Twelve Data
Same instrument, two spec sheets — measured, not claimed.
Markbase vs Twelve Data: common questions
Which is more reliable, Markbase or Twelve Data?
On our scheduled checks, Twelve Data leads on measured uptime — Markbase at 98.3% versus Twelve Data at 99.44% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Which is faster, Markbase or Twelve Data?
Twelve Data has the lower median latency in our checks — Markbase responds in 581 ms versus Twelve Data at 111 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 Markbase and Twelve Data need an API key?
Markbase needs no key, while Twelve Data requires a free API key. If you want to start calling without signup, reach for Markbase first.
Can I call Markbase and Twelve Data from the browser?
Yes — both Markbase 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 Markbase and Twelve Data free for commercial use?
Markbase 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.