Mergix

The free cloud-based software helps you to quickly find and remove duplicate contacts in all address books on any devices. Mergix starts decluttering your contact list from the roots. It will scan all connected contact sources (Gmail, Microsoft Outlook, Exchange, Office 365 Mail, iCloud, Hotmail) linked to your device. Compare your contacts across them and find all duplicated, closely matching and junk contact entries. After all your contacts are fixed in email accounts and other connected sources, you will have a clean and updated contact list in each of your device - Windows PC and Mac, iPad, iPhone or Android.