Neptune.ai

Neptune.ai is a lightweight, high-performance experiment tracker and MLOps metadata store built for large-scale model training and tracking. It features a flexible hierarchical namespace dictionary architecture (run["parameters/lr"] = 0.001, run["metrics/loss"].append(0.24)), enabling data scientists to log any arbitrary nested data structure, code snapshots, and model weights asynchronously with zero training loop overhead. It includes a centralized model registry, scalable run querying across millions of experiments, and flexible team workspace dashboards.