Technologies for generating notification messages from data provided from different data sources in different data formats are provided. The disclosed techniques include a blender service that receives, from a first source, first data that is in a first data format and generates, based on the first data, a first event that includes content from the first data. The blender service also receives, from a second data source, second data that is in a second data format and generates a second event that includes content from the second data. An event processing system receives the first and second events and causes notifications to be generated based on the first event and the second event. A notification system generates the notification messages and sends the notification messages to the recipient users.