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ContactBook is G Suite marketplace app that helps you share Gmail contacts with G Suite and Gmail users. All shared contacts will be instantly reflected in all the devices the users are logged in with.
ContactBook: Share Google Contacts
Share Google Contacts with Gmail or G Suite Users
Sunny Dholakia
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In 2020 if you are looking for the best options then you must have tried www.contactbook.app one of the best contact sharing application.
Shared Groups
Contact Sharing Simplified [for Gmail]