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Professional services

Applying specialist judgment to a client problem.

Professional firms sell expertise through projects, retainers, or continuing services. Work depends on scarce skills, client trust, and the ability to turn an uncertain brief into a defined deliverable. Time is an input, but the customer may pay for an outcome or a fixed scope.

What to look for

Look at utilization alongside realization, project margin, and client concentration. More billable hours can conceal underpricing or rework. Methods, reusable knowledge, staffing leverage, and quality review explain how a firm can grow beyond the capacity of its founders.

Explore this sector

10 companies to know

Selected examples from the industries covered in this sector, spanning different operating roles. This is an editorial selection, not a ranking by revenue, market value, or size.

Listed alphabetically. Names link to official sources. Checked . How we select examples.

This is a developing reference. This sector currently contains 1 detailed profile; the index does not claim exhaustive coverage of every subsector.

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From understanding to operating

Try this workflow with ERP.AI

Plan client projects, assign work, track dependencies and milestones, and review time, expenses, and client approvals as professional teams deliver an agreed scope.

1 Choose the app

Project Management PSA on ERP.AI

Review the app and start its setup.

2 Run it with Proto

Download Proto

Get the desktop agent, then return to the app page to continue setup.