Disclosed embodiments relate to website hosting implemented in a server environment. Operations include co-hosting, on a hosting server, a plurality of websites generated by a plurality of users; making available to the plurality of users common editing tools; preventing at least some of the plurality of users from altering co-hosted specific websites generated by others of the plurality of users; generating an interface for enabling the at least one subset of the plurality of users to upload to the hosting server plugin code associated with plugins for the co-hosted specific websites generated by the at least one subset of the plurality of users; storing the user-uploaded plugin code; and securely enabling, using an isolation mechanism, at least one of execution of front-end plugin functionality code at the client or execution of back-end plugin functionality code at the plugin server.