Kili is a platform that empowers a data-centric approach to Machine Learning through quality training data creation. It provides collaborative data annotation tools and APIs that enable quick iterations between reliable dataset building and model training. You can quickly annotate the image, video, text, pdf, and voice data while controlling the quality of the dataset. In a few minutes you can start annotating your data through a catalog of intuitive and configurable interfaces. You can easily speed up the labeling process by connecting one of your models to pre-annotate the data, making the work of annotators from 2 to 10x faster.
Kili Technology also provides powerful APIs for GraphQL and Python which eases data management a lot. More information here