Weights & Biases Terms of Service

This is the legal agreement between you and Weights & Biases that governs your use of their AI experiment tracking and model management platform. The most important thing to know is that W&B's liability to you is capped at the amount you paid them in the last 12 months, and you must resolve disputes through binding arbitration rather than in court — with only a 30-day window to opt out after you first agree. If you use the platform for healthcare or other highly regulated data, you must separately negotiate a Business Associate Agreement, as none is included by default.

This document is the Weights & Biases (W&B) Master Service Agreement (MSA) governing customer access to and use of W&B's AI developer platform, including its experiment tracking, model management, and MLOps tools, operating under California law with disputes subject to binding arbitration. The MSA imposes significant obligations on customers, including restrictions on reverse engineering, prohibitions on using the platform for HIPAA-regulated data without a separate BAA, customer responsibility for all activity under their accounts, and broad indemnification of W&B for customer-caused harms. Notably, the agreement includes a mutual class action waiver and mandatory arbitration clause, a broad limitation of liability capping W&B's total exposure at fees paid in the prior 12 months, and a unilateral right for W&B to modify pricing and features with limited notice. The agreement engages GDPR (via data processing addendum references for EU customers), CCPA (California-resident data rights), and the EU AI Act insofar as W&B's platform is used to develop and deploy AI/ML systems subject to emerging EU obligations; enterprise customers deploying W&B in regulated industries (healthcare, finance) must assess whether the platform's data handling satisfies sector-specific compliance requirements such as HIPAA and SOC 2. Material compliance considerations include the absence of an embedded HIPAA BAA, reliance on customer-side data controls, and the arbitration clause's 30-day opt-out window that business customers in particular must actively manage.