Data USA vs PermisAPI
Same instrument, two spec sheets — measured, not claimed.
Data USA vs PermisAPI: common questions
Which is more reliable, Data USA or PermisAPI?
Both are neck-and-neck — Data USA and PermisAPI each measure 100% 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, Data USA or PermisAPI?
Data USA has the lower median latency in our checks — Data USA responds in 433 ms versus PermisAPI at 1125 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 PermisAPI need an API key?
Data USA needs no key, while PermisAPI requires a free API key. If you want to start calling without signup, reach for Data USA first.
Can I call Data USA and PermisAPI from the browser?
Only Data USA is browser-friendly — it returns CORS headers over HTTPS. PermisAPI needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are Data USA and PermisAPI free for commercial use?
Data USA has unclear commercial terms, and PermisAPI 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.