Ticari lisanslı Google Contacts için CircleBack'a alternatifler

• Google Contacts
  Tüm platformlar Windows Mac Linux Chrome OS Android iPhone Windows Phone Blackberry Blackberry 10 iPad Android Tablet Windows S PlayBook Web Self-Hosted Software as a Service (SaaS) Windows Mobile Java Mobile Microsoft Office Outlook iOS S60 Chrome Gmail Firefox OS Sailfish OS Salesforce.com HubSpot Intercom Marketo Pardot Eloqua Google Contacts
• Ticari lisans
  Herhangi bir lisans Ücretsiz lisans Açık Kaynak lisansı Ticari lisans