Trello is a popular online project management platform with millions of users worldwide. Unfortunately, its advantages (simplicity, Kanban view) frequently make Trello unusable in business environment, especially as project complexity increases. Here's a side by side feature comparison between Trello and Bitrix24 to help you decide, if it's a free Trello alternative you've been searching for.
* Please note that the information may have changed since the publication. For current prices and features please visit Bitrix24 pricing page.