Tambo is an open source AI orchestration framework focused on React front-end apps, letting developers build rich, generative UI assistants that respond to natural language. With Tambo, you register React components and tools once, and the system handles when and how to display UI components (forms, dashboards, charts, etc.), manage state, and call APIs/tools as needed. It supports features like message-thread history, streaming UI/content, suggested actions, authentication, and integration with Model Context Protocol (MCP) servers for context or external data. There’s a pre-built component library to accelerate development (e.g., control bars, message threads, generative forms), CLI tools, hosting via Tambo Cloud, and self-hosting options. Plans range from a free tier (with message/usage limits and community support) to paid tiers that offer higher message volumes, team seats, SSO/RBAC, SLAs, observability, and more.