Founded in 2017 and headquartered in New York and San Francisco, Weights & Biases is an ML experiment tracking and visualization platform used by 500,000+ data scientists, offering dashboards, Sweeps hyperparameter search, model registry and team collaboration.
MLflow is an open source ML lifecycle platform initiated by Databricks in 2018 and now a Linux Foundation project. It offers experiment tracking, model registry and model serving with a framework-agnostic, lightweight design and about 20,000 GitHub stars.
Neptune.ai is a professional ML experiment tracking and metadata management platform headquartered in the United States. Through structured metadata, team workspaces and model registry capabilities, it helps data science teams systematically record, compare and collaborate on ML experiments.