Chinilla

The tool lets users construct system architectures by dragging and dropping services, queues, and databases, then wires them together to form a complete design. Once assembled, a built‑in simulation engine generates realistic traffic, allowing users to observe packet flow, queue buildup, request drops, and bottlenecks as they occur in real time. The interface includes a set of universal blocks, behaviors, and templates, and can import code from GitHub or raw files in many languages, automatically extracting an architectural diagram for immediate simulation.

It is aimed at people preparing for system‑design interviews, educators, and developers who want to test the resilience of their designs under load. The platform supports collaborative editing via live cursors, a mock interview mode with a rubric, and an AI assistant that analyzes simulation results, explains failures, and suggests fixes. Export options cover static images, animated GIFs, Mermaid diagrams, and embeddable live links.

The free tier provides the core drag‑drop, simulation, and export features without requiring a credit card, while a paid tier adds the AI design partner, GitHub repository import, and additional export formats. The product is positioned as an experimental, web‑based simulator for exploring and validating system designs.