Multi-chamber hosted computing environment for collaborative development between untrusted partners

A collaboration computing environment can be established for facilitating collaboration among multiple users where is distrust between them. The collaboration computing environment comprises one or more chambers that provide data security by limiting data access pathways, deactivating data access functionality and providing an indirect data upload path. Individual users, or defined groups of users, such as users associated with a specific entity, can utilize computing functionality provided within the confines of a single chamber to execute computer-executable instructions and, thereby, consume existing data and generate modified and/or new data. To facilitate collaboration, a shared storage can be enabled in the collaboration computing environment to which multiple chambers can be provided at least some form of access. Further collaboration is facilitated through a collaboration chamber, which can comprise computing environments, such as virtual machines, that can be established to require multiple simultaneous logins.