IMPORTANT! As of January 1, 2021, telephony options are available only to Bitrix24 commercial plan users. Please see Bitrix24 pricing page for current information.Bitrix24 is a free virtual phone system created specifically for small businesses that works in 43 different countries, including USA, Canada, UK and Australia. You can rent local ($4/mo), toll free ($6/mo) and international phone numbers ($11/mo) or connect it to your own PBX (office or virtual) in order to use your existing phone number(s).
* Please note that the information may have changed since the publication. For current prices and features please visit Bitrix24 pricing page.
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Bitrix24 CRM manual is available here. If you are interested in buying self-hosted editions of Bitrix24, which come with API, CMS and source code, can be easily customized and integrated with other tools, please download a trial version here.