Abstract: In some examples, notification service implementation may include detecting, with respect to a notification service of a plurality of notification services, based on an analysis of signals received at an activity event hub, at least one incident associated with activities of an entity. Based on an analysis of the incident, a determination may be made as to whether the incident is actionable, and information related to the incident may be requested from a data endpoint. Based on the received information, a notification object may be generated to notify the entity of the incident. Further information related to the incident may be stored with respect to the notification service by utilizing a database that is commonly used by the plurality of notification services. A stateless restart associated with the notification service may be performed in an event of a failure of the notification service based on the stored further information.