Easiio, Inc. provides business phone systems and call center software to small and medium site business. Easiio call center is a feature rich set of complete contact center solution, including call center dialer, CRM integration, IVR with visual editing, web and SMS chat with ITR support, and integration API interface https://community.wongcw.com/blogs/778738/Web-Site-Development-and-SaaS-Web-Development-A-Comprehensive-Guide