Subdomain Module for HRM SAAS has been launched on 15th July 2020 Now have companies their own sub-domain
https://froiden.freshdesk.com/en/support/solutions/articles/43000585327-hrm-saas-module-installation
https://froiden.freshdesk.com/en/support/solutions/articles/43000585298-documentation-and-setup
This plugin is available for HRM SAAS version above 4.1.3