Mem is an AI-powered workspace that acts as a second brain, automatically organizing and connecting notes without manual tagging or filing. It uses GPT-4 to power Smart Search for natural language queries across your knowledge base, Smart Write for generating content from existing notes, and Mem Chat for conversational interaction with your notes. Mem 2.0 added Voice Mode for capturing spoken thoughts into organized, searchable notes, meeting transcription, and full offline support across web, desktop, and mobile. It integrates with email, calendar, Zapier, and browser extensions for seamless capture.