Techniques are described that determine a user to participate in software testing of a social network application and/or service and to enable the user to propagate an invitation to contacts of the user to participate in the software testing of the social network application. In some examples, the user may be provided a message via an inbox of a first service including the invitation and a selectable option to install an application associated with a second service. In some, examples, the user may be sent a list of contacts from which the user may select other users to also participate in the software testing of the social network application. In some examples, responsive to the user's selection, a message may be sent to an inbox of the selected contacts that contains an invitation to participate in the beta version of the social network application.