ERPNext supports multiple companies in one database, but the day-to-day experience keeps every company's modules and records in one cluttered desk - users must pick the company on every transaction, and it is easy to post into the wrong subsidiary. Groups coming from Odoo expect something better: log in once, choose the company you are working in, and see only that company's world. Company Hub delivers exactly that as a separate, upgrade-safe Frappe app, ready to install. A company dropdown sits in the main navigation; the selection is remembered and every new transaction defaults to it; each company displays only the workspaces you map to it (a construction subsidiary sees projects and procurement, a property subsidiary sees leases and landlords, a security firm sees its own operations); and group management can switch freely with a consolidated view. Crucially, restriction is not cosmetic - data isolation is enforced server-side with ERPNext User Permissions, so records stay protected in reports, search and direct links. Includes a per-company workspace mapping screen and an admin helper to grant company access per user. ECOSIRE configures it for your group's companies during installation.