Weights & Biases

Weights & Biases is an AI developer platform designed to help teams build AI agents, applications, and models with confidence. The platform provides a comprehensive suite of tools spanning the entire machine learning lifecycle, from experiment tracking and hyperparameter optimization to model management, evaluation, and production monitoring. Their two core product lines—W&B Models for building and managing AI models, and W&B Weave for iterating, evaluating, and monitoring AI agents—enable organizations to productionize AI at scale. Trusted by over 1,000 leading companies including OpenAI, Microsoft, Toyota, and Canva, Weights & Biases has established itself as a critical infrastructure provider in the AI development ecosystem. The platform offers enterprise-grade security with certifications including ISO 27001, SOC 2, and HIPAA compliance, along with flexible deployment options including multi-tenant SaaS, dedicated, and customer-managed environments. With integrations across popular frameworks like PyTorch, TensorFlow, LangChain, and LlamaIndex, teams can get started with minimal code changes while gaining comprehensive visibility into their AI workflows. The company also provides serverless reinforcement learning capabilities for fine-tuning large language models, access to hosted inference models from leading providers like OpenAI, Meta, and DeepSeek, and educational resources including AI courses to help teams upskill in modern machine learning practices.