Free AI Tools for data annotation

SuperAnnotate is an enterprise AI data platform for annotation, dataset creation, evaluation, and human-in-the-loop workflows.

Ultralytics is an end-to-end computer vision platform for annotating data, training YOLO models, and deploying vision AI at scale.

Roboflow is a computer vision platform for building, training, deploying, and managing visual AI for images, video, and real-time streams.

Appen provides human-validated data and evaluation services that help train, align, and assess frontier AI systems.