Look at some apps like Clockify, Slack, Trello, Jira, Asana, all have teams, -- I really like the way clockify does workspaces, and then you clients, and projects per client. All organized nicely. This sort of model of teams/projects would probably be quite common in SaaS...think anything tagetting SMB's that need to give access to parts of the app for their employees or contractors, or use it to organize, etc...