AFFiNE is an open-source, all-in-one KnowledgeOS designed for individuals and teams seeking a versatile, privacy-focused workspace. It combines document editing, whiteboarding, database management, and AI-powered writing and planning in a single platform. With block-based content creation, visual collaboration, and task management, AFFiNE supports creative, professional, and organizational workflows. Its local-first architecture ensures data control while enabling real-time collaboration, making it ideal for startups and established organizations valuing customization and security.