IMPORTANT! As of January 1, 2021, telephony options are available only to Bitrix24 commercial plan users. Please see Bitrix24 pricing page for current information.
If you are looking for a free VoIP phone system for your small business, Bitrix24 is what you need. Unlike other voip solutions, Bitrix24 works both as your internal PBX system and as contact center for inbound and outbound calls. It’s also the only free voip system that comes with fully featured free CRM. Importantly, when you clients call you from a phone number recorded in CRM, they will be identified, connected to assigned manager and their phone call will be logged and recorded, if necessary. Bitrix24 is available in cloud and on premise as self hosted software that can be installed on your server (the latter version comes with open source code access).
* Please note that the information may have changed since the publication. For current prices and features please visit Bitrix24 pricing page.
P.S. If you share this page in Facebook or Twitter with hashtag #bitrix24, you'll automatically get a chance to win a 12-month subscription for Bitrix24 Professional ($2400/yr value)
For more technical information, please refer to Bitrix24 manuals regarding how you can set up Bitrix24 as cloud or self hosted call center software.