EPA vs OpenRegistry
Same instrument, two spec sheets — measured, not claimed.
EPA vs OpenRegistry: common questions
Which is more reliable, EPA or OpenRegistry?
On our scheduled checks, EPA leads on measured uptime — EPA at 83.1% versus OpenRegistry at 80.0% 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, EPA or OpenRegistry?
OpenRegistry has the lower median latency in our checks — EPA responds in 1268 ms versus OpenRegistry at 241 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 EPA and OpenRegistry need an API key?
EPA needs no key, while OpenRegistry requires a free API key. If you want to start calling without signup, reach for EPA first.
Can I call EPA and OpenRegistry from the browser?
Only EPA is browser-friendly — it returns CORS headers over HTTPS. OpenRegistry needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are EPA and OpenRegistry free for commercial use?
EPA has unclear commercial terms, and OpenRegistry 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.