Agency accounts are accounts under top tear plans of SyncSpider. Next to higher number of tasks, task runs and operations, they will also give you Agency Features.
Agency accounts can add X number of Sub-accounts (Sub-Companies) to help you better organize your tasks and work flows.
E.G. You may have have multiple companies you need to automate the tasks for, or you may have a number of clients you are providing automation or sync services.
Agency features will help you better organize your task, find and access them easier.
Additionally, under every Sub-account you can add Projects to organize your tasks even better.