AutoChangelog vs VATlayer
Same instrument, two spec sheets — measured, not claimed.
AutoChangelog vs VATlayer: common questions
Which is more reliable, AutoChangelog or VATlayer?
Both are neck-and-neck — AutoChangelog and VATlayer 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, AutoChangelog or VATlayer?
VATlayer has the lower median latency in our checks — AutoChangelog responds in 578 ms versus VATlayer at 473 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 AutoChangelog and VATlayer need an API key?
Both ask you to authenticate — AutoChangelog uses an API key and VATlayer uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.
Can I call AutoChangelog and VATlayer from the browser?
Neither sends browser-friendly CORS headers reliably, so call AutoChangelog and VATlayer from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.
Are AutoChangelog and VATlayer free for commercial use?
AutoChangelog has unclear commercial terms, and VATlayer 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.