Bitrix24 (www.bitrix24.com) is a collaboration platform launched by Bitrix, Inc. in 2012. Bitrix24 provides a complete suite of social collaboration, communication and management tools for your team, including CRM, files sharing, time management, calendars, and more. Bitrix24 has been chosen by over one million organizations worldwide and is free for unlimited users in cloud. On-Premise version of the platform comes with source code access and can be installed on your server.