Conjecture, hosted on GitHub at https://github.com/etsy/Conjecture, is an open-source project developed by Etsy. It provides a scalable machine learning framework specifically designed for handling massive-scale learning tasks. The focus of Conjecture is to offer robust, distributed machine learning algorithms that can process and analyze large datasets effectively. This framework is particularly useful for businesses and developers looking to implement machine learning capabilities into their applications to enhance decision-making and provide predictive insights based on vast amounts of data. Conjecture supports various machine learning models and is engineered to integrate seamlessly into large, complex technology ecosystems. This tool is valued for its scalability, flexibility, and efficiency in handling big data machine learning challenges.