Embodiments include methods for generating automated responses to event feed items in a multiplatform collaboration system. The methods can include receiving event notifications for events generated at a respective application service of a set of applications services, rendering a set of event cards corresponding to the events, and identifying a subset of event cards that include an update to a comment field. Methods include generating, for each event card in the subset of event cards, a comment field and causing the client device to display event cards of the set of event cards in an event feed. Methods include a, in response to a user selecting a reply option in an event card, causing the client device to launch an application platform associated with the application service and generate a response interface including a pre-populated response comment.