Controlling feature release using gates

The disclosure is directed to controlling availability of a feature of an application without having to change a code of the application. A gate application employs a "gate" that facilitates making a feature available to a set of users without having to change the code of the application as the set of users to whom the feature is to be made available change. The gate includes parameters and criteria that can determine whether a particular feature of the application, e.g., a photo tagging feature of a social networking application, is to be made available to a particular user. If the request attributes, e.g., attributes associated with a requesting user, satisfy the criteria defined in the gate, the gate indicates to the host application to make the feature available, which then executes a portion of the code corresponding to the particular feature to make the particular feature available to the user.