Khoj is an open-source AI copilot that integrates with your personal notes to provide quick and contextual answers without Google search. It merges online searches with your data from PDFs, markdown, GitHub, and more, keeping you focused and organized. Supporting text-to-speech and offering custom AI agents, it enhances productivity and can run offline for privacy. Accessible across platforms, Khoj aims to make personal AI accessible and transparent, allowing customization and self-hosting. It's backed by YCombinator and offers special pricing for students, emphasizing accessibility, transparency, and security.