CVAT

CVAT is a leading open-source annotation platform for image, video, and 3D data, with AI-assisted labeling, QA, and analytics, available free self-hosted or via paid cloud tiers.

CVAT is the Computer Vision Annotation Tool, a widely adopted open-source platform for annotating images, video, and 3D data for computer-vision projects that require high precision and scale. Originally developed by Intel and now maintained by CVAT.ai, it has grown into one of the most widely used annotation platforms, with a large global developer community building on it. CVAT handles nearly every computer-vision annotation task: bounding boxes, polygons, polylines, keypoints, semantic segmentation, video tracking, and 3D cuboids for LiDAR and point-cloud data. It adds AI-assisted labeling, quality assurance, team collaboration, analytics, and developer APIs, making it suitable for both individual researchers and larger data-operations teams. The self-hosted version is fully free and open source under the MIT license, so teams with their own infrastructure can run it without cost, while paid cloud and enterprise tiers offer managed hosting and additional capabilities. Active development continues, with regular releases keeping the tool current for modern vision AI workflows.