Dioptra data management platform is an open-source platform for data management and annotation, providing data filtering, annotation, and retraining functionalities for computer vision, natural language processing, and language models. By registering your metadata to the Dioptra platform, you can diagnose model failure reasons, utilize active learning algorithms to filter the most valuable unlabeled data, and integrate with your annotation and retraining workflows through Dioptra's API. Our customers have achieved improved model accuracy on challenging examples, reduced training cycles, and minimized annotation costs by using the Dioptra platform.