Implementations set forth herein relate to providing a subsidiary application GUI via a client interface. The GUI can be rendered when a user is accessing a first party system via an application that is provided by the first party or a separate entity. The subsidiary application GUI can be rendered in response to the user providing a search query to the first party server-such as a search query that is in furtherance of initializing receiving certain search results. The server can identify, based on the search query, one or more entities that offer primary and/or subsidiary applications, and request subsidiary data for visibly rendering corresponding subsidiary applications for each entity. The subsidiary applications can optionally provide access to application functions that would not otherwise be available at the client without a corresponding application being installed.