QuickBooks Online (QBO) is the cloud-based, online version of accounting software provided through a monthly subscription pricing plan. Small business plans include Simple Start, Plus, and Advanced. The QBO Self-Employed plan is offered to freelancers. QuickBooks Online offers upgrade options and integrates with many add-on third-party apps to increase functionality.  CPAs and bookkeepers use QuickBooks Online Accountant software to access or prepare their clients’ accounting.