Best AI Data Labeling & Annotation Platforms

AI data labeling and annotation platforms are software solutions for tagging and categorizing datasets used in training machine learning models. They support tasks such as image bounding boxes, semantic segmentation, text entity recognition, and video frame annotation. Included are SaaS platforms, self-hosted tools, and open-source options; general-purpose image editors and spreadsheet-based methods are excluded. Key decision factors include supported data types, automation capabilities, team collaboration features, and pricing scalability.