Flowdock is a group chat and a business messenger acquired by RallySoftware. It was created with the idea of creating a centralized 'team inbox' but fell short of the goal since Flowdock never managed to integrate email server, project management, document management and other team tools. Flowdock creators also decided to concentrate on software developers as their target audience, failing to provide tools and integrations relevant to 'regular business'. Here's a detailed comparison chart to help you decide if Bitrix24 is a free Flowdock alternative you've been looking for.
* Please note that the information may have changed since the publication. For current prices and features please visit Bitrix24 pricing page.