Bitrix24 is a free CRM with VoIP telephony that requires no integration. Unlike other CRM systems that
require extensive (and expensive) efforts in order to make it work with your telephony, in Bitrix24 you will be able to make and receive calls in just 30 seconds.
You can rent local, international and toll free numbers in 43 different countries, or keep your current number and connect your PBX/VoIP system to Bitrix24 via SIP trunk.
Bitrix24 works with SIP/VoIP phone sets and softphones. Importantly, all calls to and from CRM are logged, recorded, if necessary, and are automatically routed to a
manager assigned to that lead or client. Missed phone calls can be converted to leads automatically. Business hours, recorded messages, on hold music and other parts
of Bitrix24 CRM are fully customizable. Bitrix24 is available in cloud and on premise with open source code access that you can modify.