Abstract: Certain embodiments herein relate to generating profiles associated with users and comparing the profiles to determine which contributions, such as conversations, in which the users should participate. User profiles may be based on a user's historical activities, such as browsing certain web pages or generating ideas that may be shared by others, as well as a user's personality profile. Each profile may be scored based at least in part on the user's historical activities and personality profile, as examples, to identify other users who should be invited to participate in conversations with the user.