Lightly

Lightly is a multimodal computer vision platform for ML teams, covering data curation, annotation and QA, model evaluation, and dataset management. It addresses the problem of selecting and preparing the right data for training and improving computer vision models, combining these steps in a single pipeline.

The platform consists of two products: LightlyStudio, a data hub for curating, annotating, evaluating, and visualizing data, and LightlyTrain, which turns that data into production models. LightlyStudio offers automatic embeddings on index, text and image similarity search, sampling strategies such as deduplication, outlier detection, and class balancing, object-level search, and auto-labeling plugins including SAM3 and LightlyTrain. It supports detection, classification, and segmentation evaluation with a built-in confusion matrix, versioned annotations, role-based access (Viewer, Labeler, Editor, Admin), and export in formats such as COCO, YOLO, and Pascal VOC via GUI or Python. Plugins can be installed or built with the Python API.

Lightly is built for ML engineers and organizations scaling computer vision. A free plan is available, and the platform integrates into existing machine learning pipelines.