System Design Interview Preparation Tool

Diagrammatic is a comprehensive system design learning platform that helps software engineers, students, and architects master the art of designing scalable distributed systems. Our interactive playground provides hands-on experience with real-world architecture patterns.

Learn System Design Through Practice

Practice makes perfect. Our curated collection of system design problems covers everything from basic CRUD applications to complex distributed systems serving millions of users. Each problem includes detailed requirements, constraints, and AI-powered feedback on your solution.

Components Library

Build realistic architectures using our extensive component library: API Gateway, Load Balancer, Reverse Proxy, Backend Server, Microservice, Database (SQL/NoSQL), Cache (Redis/Memcached), Message Queue, CDN, Object Storage, Search Engine, Analytics Engine, Monitoring System, and 1k+ more components. Includes AWS, Azure, and GCP cloud-specific components for designing cloud-native architectures.

Multiple Diagram Types

Not just system design! Create Entity-Relationship (ER) diagrams for database schema design, UML diagrams for software architecture, and cloud infrastructure diagrams with provider-specific components.

AI-Powered Features

Leverage AI for intelligent design assistance. Get instant assessment of your architecture designs, receive smart component recommendations based on your current design context, and identify potential improvements in scalability, reliability, and performance.

Collaboration & Sharing

Work together in real-time with your team. Share designs via compressed URLs, manage collaborator permissions, see live cursor positions, and sync changes instantly. Perfect for distributed teams and remote collaboration.

Free & Open Source

Diagrammatic is completely free to use. No signup required for the Design Studio. Create unlimited diagrams, export them in multiple formats (PNG, JPEG, SVG, JSON, XML), and share with your team or interview panel.