Scrapfly vs serpstack
Same instrument, two spec sheets — measured, not claimed.
Scrapfly vs serpstack: common questions
Which is more reliable, Scrapfly or serpstack?
On our scheduled checks, serpstack leads on measured uptime — Scrapfly at 98.3% versus serpstack at 99.44% 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, Scrapfly or serpstack?
serpstack has the lower median latency in our checks — Scrapfly responds in 884 ms versus serpstack at 288 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 Scrapfly and serpstack need an API key?
Both ask you to authenticate — Scrapfly uses an API key and serpstack 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 Scrapfly and serpstack from the browser?
Neither sends browser-friendly CORS headers reliably, so call Scrapfly 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 Scrapfly and serpstack free for commercial use?
Scrapfly 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.