Can the users in my domain access to the Zumpul app?

Can the users in my domain access to the Zumpul app?

No, only the G Suite super admin who installed the app is able to login by default, or any collaborator that is intendedly added as a collaborator in the app, for more information on how to add signatures managers or collaborators watch:https://support.zumpul.com/portal/en/kb/articles/104-adding-new-signatures-administrator