If you're a bookkeeper managing multiple small-business clients, the two I'd put at the top of your list are QuickBooks Online Accountant and Xero Partner Hub.
Quick comparison
| QuickBooks Online Accountant | Xero Partner Hub
--- | --- | ---
Multi-client dashboard | Excellent | Excellent
Jump between client books | Yes | Yes
Client task/bookkeeping status | Yes | Yes
Bank/reconciliation visibility | Yes | Yes
Practice management | Strong | Strong
Report templates across clients | Good | Strong
Best if clients already use it | QuickBooks | Xero
Accountant/bookkeeper partner program | Yes | Yes
Client limit | Up to 2,000 per firm | Designed for growing practices
QuickBooks Online Accountant gives you a client dashboard where you can see client information, banking activity, payroll dates, tax-prep tasks and month-end review status, then jump directly into a client's books. Intuit also currently has newer Accountant Suite tools for cross-client insights and month-end close.
Xero Partner Hub is particularly built around the "manage your whole client portfolio" workflow. Its client-insights dashboard lets you see things such as cash balance, A/R, A/P, revenue, expenses, profit and reconciliation status across clients, with filtering and drill-down.
My practical recommendation
If most of your clients are already on QuickBooks, I'd use QuickBooks Online Accountant rather than trying to migrate everyone just for the dashboard. Its accountant tools are specifically designed for working across multiple QBO clients.
If you're building a bookkeeping practice from scratch, I'd seriously consider Xero. The Xero Partner Program is free to join, Partner Hub is included for partners, and Xero offers tools specifically for managing clients, staff, workflows and reporting from a centralized environment.
One particularly useful Xero feature for a bookkeeper is report templates: you can create a standardized set of reports and apply it across your client base rather than rebuilding reports individually.
Bottom line: there isn't one universally "best" choice—the biggest deciding factor is what your clients already use. For a mixed client base, I'd choose based on which platform you expect to standardize on going forward.
If you tell me roughly how many clients you manage (e.g. 10, 30, 100+) and whether they're mostly QuickBooks, Xero, or mixed, I can compare the pricing, accountant discounts, client-management features, payroll, and workflow automation specifically for your practice.