TeamBrain is a shared AI-native workspace that gives entire teams a single, structured knowledge base their AI tools can read from and write to. It stores team knowledge as plain markdown so any AI supporting MCP can connect directly without custom integrations. Built-in project management features include a Kanban board, shared calendar, decision log, and asset attachments, all operable by AI. TeamBrain sits between a team's existing AI tools and their collective knowledge, meaning members keep using Claude, ChatGPT, or any other preferred model while pulling from one shared brain.