SniffCat vs URLScan.io
Same instrument, two spec sheets — measured, not claimed.
SniffCat vs URLScan.io: common questions
Which is more reliable, SniffCat or URLScan.io?
On our scheduled checks, URLScan.io leads on measured uptime — SniffCat at 83.3% versus URLScan.io at 97.1% 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, SniffCat or URLScan.io?
SniffCat has the lower median latency in our checks — SniffCat responds in 290 ms versus URLScan.io at 1322 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 SniffCat and URLScan.io need an API key?
Both ask you to authenticate — SniffCat uses an API key and URLScan.io 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 SniffCat and URLScan.io from the browser?
Neither sends browser-friendly CORS headers reliably, so call SniffCat and URLScan.io from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.
Are SniffCat and URLScan.io free for commercial use?
SniffCat allows commercial use on its free tier, and URLScan.io 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.