Authenticator plugin interface for an enterprise virtualization portal is provided. An example method for evaluating a portal access request may comprise: receiving, by a virtualization management platform, a request initiated by a requestor for access to an enterprise virtualization portal associated with the virtualization management platform, the request comprising a login credential; transmitting, to a first external authentication system, a first authentication query comprising an identifier of a first data type, and a first value of the first data type, wherein the first value is derived from the login credential; receiving a first response message comprising an identifier of a second data type, and an authentication response of the second data type; and responsive to evaluating the authentication response, granting the requestor access to the enterprise virtualization portal.