The following are the different service providers involved in the ITIL process :
Internal Service Provider : ISP usually manages the internal business or an organization. It is a dedicated resource of the business unit that physically exists to fulfill the organization's needs.
External Service Provider : ESP usually deals with the management of an external organization. It means that ESP offers IT services and features to external customers and fulfill their needs. It is not limited to any market, business, or individual.
Shared Services Unit : SSU usually acts as an extension of ISPs. This type of provider is considered an autonomous unit within the organization.
