SurfSense is an open-source AI research assistant that functions as a personal, private alternative to tools like NotebookLM or Perplexity. It enables users to save webpages (even those behind login walls), upload documents, and build a searchable knowledge base that can be queried through natural language. The tool integrates with various external sources including search engines, Slack, Notion, and GitHub, while supporting both cloud-based and local AI models for complete privacy. Users might choose SurfSense if they need a customizable research companion that combines powerful AI capabilities with full data ownership, especially when working with diverse information sources that require advanced organization, search, and AI-assisted analysis without compromising on privacy.