Unassigned at IANA, with no widely used default service.
IANA lists 8092 through 8096 as one Unassigned block, so 8093 belongs to nobody. There is no common product default here; when it appears it is a locally chosen port, typically another HTTP or application listener picked because it was free. Identify it from the service itself rather than assuming anything from the number.
Expose with care
An unregistered listener is an unknown one until you fingerprint it — treat it as an unaudited service, not as benign because it is obscure.
$ sudo lsof -nP -iTCP:8093 -sTCP:LISTENSeen this on your network? Beige Box scans your Wi-Fi and shows every open port on every device — and its Ports tool links straight back here.
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Corrections or a missing port? Reply @rimrocksystems.