serpstack vs US Autocomplete
Same instrument, two spec sheets — measured, not claimed.
serpstack vs US Autocomplete: common questions
Which is more reliable, serpstack or US Autocomplete?
Both are neck-and-neck — serpstack and US Autocomplete each measure 99.02% 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, serpstack or US Autocomplete?
serpstack has the lower median latency in our checks — serpstack responds in 492 ms versus US Autocomplete at 683 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 serpstack and US Autocomplete need an API key?
Both ask you to authenticate — serpstack uses an API key and US Autocomplete 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 serpstack and US Autocomplete from the browser?
Only US Autocomplete is browser-friendly — it returns CORS headers over HTTPS. serpstack needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are serpstack and US Autocomplete free for commercial use?
serpstack has unclear commercial terms, and US Autocomplete 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.