Organization vs. Workspace

Organization and Workspace are two different concepts. The Organization is the billing entity. The Workspace is the access boundary inside it.

The model

What it isWhat it does
OrganizationThe billing entity — typically a law firm or in-house legal departmentOwns the subscription. Buys seats. Contains Workspaces and Members.
WorkspaceA subgroup inside an Organization, scoped to a subset of its MembersDecides who sees which Matters.

Most users belong to one Organization. The workspace switcher always lists Workspaces in the active Organization.

Single-org vs. multi-org

If you belong to more than one Organization, an organization switcher appears on the Organization tab page title. Single-organization users see the organization name as plain text, with no switcher.

Billing

Billing is at the Organization level. Adding a Workspace doesn't change your seat count; only adding a Member does.