Fuses browser entropy with randomization-proof network + hardware signals. Reload, reopen, switch tabs — the id should hold and the confidence should climb.
Tip for the demo: hit Re-identify a few times, then hard-reload. First hit on a fresh browser = NEW. Subsequent hits = KNOWN with rising confidence.
| visitor | sightings | last seen |
|---|---|---|
| loading… | ||
Re-identification rate: share of identifies that matched a known device (recall). Identity separation: of every distinct-ID pair, how many the engine keeps apart — a suspected duplicate is a likely false-split (precision). Actual collisions: merges where a different physical device was absorbed into an id (individuating evidence disagreed) — repeat visits from the same user are confirmed re-ids, never counted here. Blind merges: network-anchored merges with no individuating evidence (e.g. two same-model Macs on Safari) — undecidable by passive fingerprinting, shown honestly. True accuracy needs labeled data; these are honest proxies.
hover a flagged badge for the reason. Mobile-native signals (root/jailbreak/emulator) need a native SDK and aren't shown.