Practice on a real-time canvas with instant cost and traffic simulation. Get AI feedback on every design — like a senior engineer in your corner. No credit card to start.
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Structured practice with cost, traffic, and AI feedback — not just diagrams.
Drag-and-drop system design with 20+ components. Connect APIs, DBs, caches, and see data flow.
Real-time monthly cost as you design. No more guessing AWS bills.
Stress-test your architecture. Find bottlenecks before the interviewer does.
Run a deep analysis and get feedback like from a staff engineer — bottlenecks, scaling, security, and clear next steps.
Three steps to go from blank canvas to interview-ready system architect. Structured system design practice + AI feedback — not just diagrams.
Drag components from the palette — APIs, databases, caches, load balancers, queues — and connect them into your distributed system.
Run load simulations to stress-test your design. Get real-time cost estimates and see exactly where your system breaks under pressure.
Trigger deep AI analysis of your design. Get actionable feedback on bottlenecks, single points of failure, and improvement suggestions.
Start free →Diagram tools let you draw. MockArch gives you cost simulation, load testing, and AI feedback so you're ready for the real thing.
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Unlimited AI feedback & interview practice
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Join engineers who stopped guessing and started designing with confidence. Start for free in under 60 seconds.
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