Data USA vs EPA
Same instrument, two spec sheets — measured, not claimed.
Data USA vs EPA: common questions
Which is more reliable, Data USA or EPA?
On our scheduled checks, Data USA leads on measured uptime — Data USA at 100% versus EPA at 54.9% 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, Data USA or EPA?
Data USA has the lower median latency in our checks — Data USA responds in 433 ms versus EPA at 3150 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 Data USA and EPA need an API key?
Neither needs a paid key — Data USA is callable with no signup, and EPA is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Data USA and EPA from the browser?
Yes — both Data USA and EPA 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 EPA free for commercial use?
Data USA has unclear commercial terms, and EPA 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.