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Portscan vs URLScan.io

Same instrument, two spec sheets — measured, not claimed.

APIPortscanHEALTHY96URLScan.ioHEALTHY58
Uptime · 30d
Uptime · 90d99.02%97.1%
Uptime · 30d100%95.0%
P50 · ms3351322
P95 · ms7344908
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — key may be required
Rate limitUnpublished30 req/window · 29 remaining
In directory since2026-07-052026-07-05
operationalpartialdownno data

Portscan vs URLScan.io: common questions

Which is more reliable, Portscan or URLScan.io?

On our scheduled checks, Portscan leads on measured uptime — Portscan at 99.02% 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, Portscan or URLScan.io?

Portscan has the lower median latency in our checks — Portscan responds in 335 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 Portscan and URLScan.io need an API key?

Portscan needs no key, while URLScan.io requires a free API key. If you want to start calling without signup, reach for Portscan first.

Can I call Portscan and URLScan.io from the browser?

Only Portscan is browser-friendly — it returns CORS headers over HTTPS. URLScan.io needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Portscan and URLScan.io free for commercial use?

Portscan 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.