Nozbe is a Getting Things Done inspired task and project manager. It has a number of great features, such as an option to create tasks directly from email. It's very easy to use and has basic collaboration tools, but if you are need full-featured project management with Gantt chart, client management, employee time planning, work reports, you have to look elsewhere. If you are searching for a free Nozbe alternative, you'll love Bitrix24. Free for 12 users with unlimited tasks and projects, it's available in cloud or on-premise as self-hosted software with open source code. Here's a comparison chart that'll help you decide if Bitrix24 is the right choice for you.
* Please note that the information may have changed since the publication. For current prices and features please visit Bitrix24 pricing page.