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