FilterLists vs URLScan.io
Same instrument, two spec sheets — measured, not claimed.
FilterLists vs URLScan.io: common questions
Which is more reliable, FilterLists or URLScan.io?
On our scheduled checks, FilterLists leads on measured uptime — FilterLists at 98.0% 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, FilterLists or URLScan.io?
FilterLists has the lower median latency in our checks — FilterLists responds in 357 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 FilterLists and URLScan.io need an API key?
FilterLists needs no key, while URLScan.io requires a free API key. If you want to start calling without signup, reach for FilterLists first.
Can I call FilterLists and URLScan.io from the browser?
Neither sends browser-friendly CORS headers reliably, so call FilterLists 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 FilterLists and URLScan.io free for commercial use?
FilterLists has unclear commercial terms, 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.