About Weights and Biases
Weights and Biases is the leading MLOps and AI development platform for machine learning experiment tracking, founded in 2017 and headquartered in San Francisco, California. Founded by Lukas Biewald, Chris Van Pelt, and Shawn Lewis, Weights and Biases provides experiment tracking, model registry, hyperparameter optimization with Sweeps, dataset versioning with Artifacts, collaborative reports, and the Weights and Biases Weave framework for LLM evaluation and observability. The platform serves over 1 million ML practitioners and over 1,000 enterprises including OpenAI, Toyota, Lyft, Salesforce, and Booking.com. Acquired by CoreWeave in March 2025 for 1.7 billion, Weights and Biases continues operating as a standalone platform within CoreWeaves AI cloud ecosystem.