Designbase is a design runtime platform that allows users to design, build, and evolve products on the same foundation across design, engineering, and AI. It enables operating design, development, and AI on the same runtime with user-defined system constraints. Features include visual editing, defining state and events visually, using real data in designs, collaboration with team and agents. Supports creating and curating patterns, distributing to teams and agents, documenting decisions and guidelines. Agents learn the system and design taste to provide aligned suggestions. Works with existing tools and platforms like VSCode, OpenAI, Claude, Cursor, Gemini, OpenRouter. Allows generating a full design system quickly or bringing own components. Facilitates multiplayer collaboration with built-in or custom agents. Connects tools and agents to Designbase context for suggestions and collaboration. Backed by investors including OpenAI, Gitlab, Cognition Labs.