ip-api.com vs serpstack
Same instrument, two spec sheets — measured, not claimed.
ip-api.com vs serpstack: common questions
Which is more reliable, ip-api.com or serpstack?
Both are neck-and-neck — ip-api.com and serpstack 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, ip-api.com or serpstack?
ip-api.com has the lower median latency in our checks — ip-api.com responds in 33 ms versus serpstack at 492 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 ip-api.com and serpstack need an API key?
ip-api.com needs no key, while serpstack requires a free API key. If you want to start calling without signup, reach for ip-api.com first.
Can I call ip-api.com and serpstack from the browser?
Neither sends browser-friendly CORS headers reliably, so call ip-api.com and serpstack from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.
Are ip-api.com and serpstack free for commercial use?
ip-api.com has unclear commercial terms, and serpstack 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.