Like Bitrix24, AirCall is a cloud based telephony service that acts as a virtual call center. Most AirCall reviews are positive. Bitrix24 is a free AirCall alternative that lets you rent local, international and toll free numbers, record phone calls, create phone extensions, leave and listen to voicemail, set up your own virtual PBX and do other things. Essentially, Bitrix24 is a call center and CRM in one. It is available both in cloud and as self-hosted software that can be deployed on-premise and installed on your server (you get access to open source code as well). To see if Bitrix24 is a free AirCall alternative that you've been looking for, please consult the table below.
* Please note that the information may have changed since the publication. For current prices and features please visit Bitrix24 pricing page.