Fixer vs Marketstack
Same instrument, two spec sheets — measured, not claimed.
Fixer vs Marketstack: common questions
Which is more reliable, Fixer or Marketstack?
On our scheduled checks, Marketstack leads on measured uptime — Fixer at 99.02% versus Marketstack at 100% 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, Fixer or Marketstack?
Marketstack has the lower median latency in our checks — Fixer responds in 481 ms versus Marketstack at 470 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 Fixer and Marketstack need an API key?
Both ask you to authenticate — Fixer uses an API key and Marketstack 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 Fixer and Marketstack from the browser?
Only Fixer is browser-friendly — it returns CORS headers over HTTPS. Marketstack needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are Fixer and Marketstack free for commercial use?
Fixer has unclear commercial terms, and Marketstack 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.