Trace and evaluate what AI agents do across sessions.
Weights & Biases Funding History
Weights & Biases develops tools for tracking machine learning experiments, evaluating models and managing them during development. It is part of CoreWeave.
Company Overview
Weights & Biases
Weights & Biases Funding Timeline
Series C
US$135 million
Felicis and BOND joined as new investors as Weights & Biases expanded its tools for managing machine learning workflows.
Participation included Felicis, BOND, Insight Partners, Coatue.
Source · prnewswire.com ↗Series B
US$45 million
Weights & Biases said it would expand beyond experiment tracking into tools for collaborating and managing machine learning workflows.
Led by Insight Partners.
Source · prnewswire.com ↗
Weights & Biases Founding Team
Lukas Biewald, Chris Van Pelt, and Shawn Lewis founded Weights & Biases in 2017 to build better tools for machine learning practitioners.
Weights & Biases Products
Weights & Biases Company Development
Application Evaluation Joins Experiment Tracking
Weights & Biases built its workflow around recording model experiments and comparing results. Weave extended that work to evaluating AI applications, where teams need to trace what a deployed or test application did rather than only inspect a training run.
Weights & Biases Competitive Landscape
Experiment Records and Production Incidents
Weights & Biases covers experiments and application evaluation. Raindrop emphasizes finding failures in live agents and turning related traces into issues. Teams may want both types of record when deciding whether a promising test result holds up in production.
