In PreprLabs, organizations are entities that create and administer Labs, Challenges, and Resources. You can start an organization by registering as one on the start page, and invite people via email or username search as managers.
To learn more about inviting users as managers, see this article.
Organizations are tied to plans, which determine how many users, managers, Labs, Challenges, and Resources they can have. For more information about plans, see this article.
Each organization has its own page, listing the Labs, Challenges, and Resources it administers, as well as branding information and key personnel. You can follow organizations to keep track of new and updated Labs, Challenges, and Resources.