Alternativer til CircleBack til Firefox OS med kommerciel licens

• Firefox OS
  Alle platforme 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
• Kommerciel licens
  Enhver licens Gratis licens Open Source-licens Kommerciel licens