1. A method comprising: at a multi-tenant media processing platform system that includes a plurality of media analysis services: activating a first media analysis service of the plurality of media analysis services for at least a portion of an active communication session of an entity in the platform system, the platform system activating the first media analysis service responsive to at least one of: a determination by the platform system that at least one property of media of the active communication session that is collected by the platform system maps to at least one setting of entity platform configuration that enables media analysis, the entity platform configuration being platform configuration of the entity in the platform system, a communication application instruction, a REST API call, and a SIP message; the activated first media analysis service performing a first media analysis on media of the active communication session that is collected by the activated first media analysis service, while the communication session is active, to generate a first media analysis result; during the active communication session, applying the first media analysis result by transmitting at least one application layer protocol message to at least one callback URI of an external system of the entity, the at least one application layer protocol message providing the first media analysis result, accounting for the use of the first activated media analysis service on behalf of the entity; and generating billing information for the entity based on the accounting for the use of the first activated media analysis service, wherein each external system of the entity is a system of an account holder of a platform account of the multi-tenant media processing platform system, each external system being external to the platform system.