Label Studio-Open-source Data Annotation Platform-Multi-project Management-Multi-user Collaboration-Label Studio is an open-source data annotation tool that supports multiple projects and users.

Label Studio is an open-source data annotation platform that supports multiple projects, users, and various data types. It allows annotation for different types of data using multiple data formats and integrates with machine learning backends.

1. Multi-project management: Label Studio supports managing multiple projects on one platform, each with different data types and annotation requirements. 2. Multi-user collaboration: Multiple users can participate in the annotation work of a project simultaneously, with the ability to assign different tasks and permissions. 3. Support for multiple data formats: Label Studio supports various data formats, including images, text, audio, and video, to meet different annotation needs. 4. Customizable annotation types: Users can customize annotation types, including rectangles, polygons, text, and classifications, to meet different annotation requirements. 5. Integration with machine learning backend: Label Studio can be integrated with a machine learning backend to utilize annotation data for AI model training and refinement.