Various embodiments of systems and methods to provide pluggable extensions of software applications are provided herein. In one aspect, plugin application package is received for deployment. The plugin application package includes configuration data to comprising various definitions for the deployment of the plugin application. In another aspect, configuration data of a host software application is updated with at least a part of the configuration data of the plugin application. The host application is reconfigured based on the updated host configuration data to refer to the plugin application. In yet another aspect, one or more plugin services provided by the plugin application are exposed through the reconfigured host application, to handle corresponding user requests.