Weights Biases
Weights & Biases (W&B) is an AI developer platform that specializes in tools for machine learning and artificial intelligence development. Founded by Lukas Biewald, Chris Van Pelt, and Shawn Lewis, the company aims to streamline the machine learning workflow from experimentation to production. W&B has raised $15 million in funding, highlighting its growth and adoption in the AI community. The platform consists of three main components: W&B Models, W&B Weave, and W&B Core. W&B Models includes features for tracking training runs, automating hyperparameter tuning, and sharing models and datasets. W&B Weave focuses on tracking and evaluating large language model applications, while W&B Core offers version control for datasets and models, visualization tools for structured data, and collaborative documentation for insights. W&B's tools are utilized by leading AI research teams and organizations, including OpenAI and NVIDIA, and have tracked nearly a million experiments, showcasing their impact on model development and reproducibility.
Work at Weights Biases in HR or recruiting? Claim this page
Headcount trend
Weights Biases went from 183 employees in Jul 2023 to 259 in Jun 2025. Jan to Jun 2025: 42 people joined, 19 left.
Headcount data through Jun 2025
Org structure
Headcount by department
Salaries at Weights Biases
All salaries8 salary profiles in the US
Most reported roles
H-1B sponsorship
The department split adds up all the years listed above. FY2025 alone: 1 filings.
Peer reviews
Worked with someone at Weights Biases?
Anonymous peer reviews on OffTheRecord
Similar companies
Weights Biases FAQ
How many employees does Weights Biases have?
Weights Biases has about 259 employees, up 0.4% over the 3 months to Jun 2025.
Does Weights Biases sponsor H1B visas?
Yes. Weights Biases filed 1 H1B (LCA) application in FY2025, according to the latest U.S. Department of Labor disclosures. It was for a Operations role.
What is Weights Biases's revenue per employee?
Weights Biases makes about $146K in revenue per employee, based on $37.8M annual revenue and 259 employees.
How much does Weights Biases pay?
6figr has 8 salary profiles for Weights Biases in the US, with pay broken down by role, level, gender and ethnicity on the Weights Biases salaries page. See Weights Biases salaries
Data from Company Prospectus, DOL LCA disclosures, WARN notices and 6figr salary profiles.
