Upwork has two kinds of freelancer accounts: individual and agency. Individual freelancers work independently and directly with their clients. Agencies are freelancer accounts that can add team members who work together on projects for their clients.
When you hire an individual freelancer, you will typically communicate directly with the freelancer about the project. In addition, the freelancer sets the rate and your payments go directly to the freelancer.
On the other hand, if you hire an agency member you are effectively hiring the agency itself, which has a number of freelancers that it pays to do work on your project. On agency proposals and contracts you may communicate mostly with a project manager or with the freelancer or freelancers working on your project, depending on how the agency does business and what arrangements you negotiate with the agency. In addition, agency contracts are paid to the agency itself, not a specific agency freelancer. The agency then pays its freelancers off platform for the work they perform for the agency at rates negotiated among them.
For more information on agencies, please visit the Hiring Headquarters.