Authentication vs EmailRep
Same instrument, two spec sheets — measured, not claimed.
Authentication vs EmailRep: common questions
Which is more reliable, Authentication or EmailRep?
Both are neck-and-neck — Authentication and EmailRep 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, Authentication or EmailRep?
EmailRep has the lower median latency in our checks — Authentication responds in 720 ms versus EmailRep at 277 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 Authentication and EmailRep need an API key?
Neither needs a paid key — Authentication is callable with no signup, and EmailRep is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Authentication and EmailRep from the browser?
Neither sends browser-friendly CORS headers reliably, so call Authentication and EmailRep from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.
Are Authentication and EmailRep free for commercial use?
Authentication has unclear commercial terms, and EmailRep 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.