About Supaboard
Supaboard is a system design interview practice tool built specifically for software engineers preparing for technical interviews at top tech companies.
The Problem
System design interviews require candidates to sketch architectures on a whiteboard, define requirements, discuss trade-offs, and explain scaling strategies. But most diagramming tools — Excalidraw, draw.io, Miro — are built for general-purpose drawing, not system design practice.
Engineers end up spending time building shapes from scratch instead of practicing the design thinking that interviewers actually evaluate. There is no built-in way to track requirements, no system design component library, and no community of real architecture diagrams to learn from.
What Supaboard Provides
Supaboard is purpose-built for the system design interview workflow. Every feature is designed around how engineers practice and how interviewers evaluate candidates.
Purpose-Built Components
Databases, load balancers, caches, message queues, CDNs, servers, and more. Every shape is designed for system design notation, not generic diagramming.
Requirements Tracker
A floating requirements panel that mirrors how interviewers score candidates. Track functional and non-functional requirements as you design, just like in a real interview.
AI Mentor
Get real-time feedback on your system design from an AI mentor powered by Claude. Ask about trade-offs, scalability, and design decisions as you work.
Community Gallery
Browse system design diagrams created by other engineers. Learn from real-world architectures for URL shorteners, chat systems, payment platforms, and more.
How Engineers Use Supaboard
1. Pick a challenge or start from scratch
Choose from guided system design challenges — URL shortener, chat system, payment platform — or create a blank board for open-ended practice.
2. Design on the canvas
Drag system components onto the canvas: databases, load balancers, caches, queues, and servers. Connect them to show data flow. The component library matches standard system design notation.
3. Track requirements
Use the floating requirements tracker to define functional and non-functional requirements as you design. This mirrors the interview workflow where candidates are expected to clarify requirements before diving into architecture.
4. Get AI feedback
Ask the AI Mentor about trade-offs, missing components, or scaling strategies. It reviews your design in context and provides actionable feedback.
5. Publish and learn from others
Publish your board to the community gallery for feedback. Browse diagrams from other engineers to discover new patterns and approaches.
Start Practicing Today
Free to start, no credit card required. Create your first system design diagram in under 60 seconds.
Get Started Free