To meet the needs of smaller sites as well as large installations and ISPs, Rumpus is offered in both Standard and Pro versions. The Standard version supports up to 32 simultaneous users and 32 user accounts defined in Rumpus' built-in security. For larger sites and ISPs, Rumpus Pro supports up to 256 simultaneous connections, with no set limit on the number of accounts that can be defined. Rumpus Standard also lacks LDAP support and a few features specifically intended for larger installations.