What is Sub-User?
A separate proxy account with its own credentials and usage limits, created under a main account — useful for teams and agencies.
A sub-user is a distinct set of proxy credentials issued beneath your main account. Each one can be given its own bandwidth cap and its own targeting defaults, and can be disabled without affecting anything else.
For agencies this is how per-client billing works: give every client their own sub-user and their consumption is measured separately, with a hard ceiling that stops one project from spending another's traffic.
It is also a containment measure. If credentials leak, only that sub-user is exposed and only up to its cap, and revoking it takes one action instead of rotating the credentials your entire operation depends on.
Related terms
Bandwidth
The volume of data transferred through a proxy, usually measured in gigabytes. Residential proxies are typically billed by bandwidth.
IP Whitelisting
Authorising specific IP addresses to use a proxy without a username and password, as an alternative to credential-based authentication.
Multi-Accounting
Operating several accounts on a platform, with each account isolated on its own dedicated IP to prevent linking and bans.
Latency
The time it takes for a request to travel through a proxy to the target and back. Lower latency means faster responses; ISP and datacenter proxies achieve under 50ms.