SketchSystemThe whiteboard that teaches you system design.
An infinite canvas with an AI tutor that reads your diagram, critiques it, and draws with you — every box and arrow explained. Practice interview classics or sketch your own architecture.
- Draw together. Ask for a diagram and watch it materialize — or draw yourself and get critique on your design, not generic advice.
- Every change explained. Click any AI-drawn element to see the engineering reason it exists.
- Interview-ready. Practice prompts from URL shorteners to ride-sharing dispatch, with a tutor that can explain everything or just critique.