Bitrix24 is the best free CRM for small business. Why are we so confident?
First, our free CRM comes with unlimited contacts, leads, deals, quotes and invoices. Second, integrated telephony and email marketing
is included free of charge. Third, we give you free online storage for your files and documents. Also, we give you the option - you can
use Bitrix24 in cloud or opt for the self hosted solution that can be deployed on premise.
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.