C4 Model Tool - Interactive C4 Diagrams & Architecture Documentation | Archyl

Create interactive C4 model diagrams online. Visualize software architecture at 4 levels: Context, Containers, Components, and Code. AI-powered discovery, drift detection, and Architecture as Code.

The best C4 model tool for modern software teams

See All Features

What is the C4 model?

System Context (Level 1)

Container Diagram (Level 2)

Technical building blocks

Component Diagram (Level 3)

Inside each container

Code Level (Level 4)

Implementation details

More than just a C4 diagram tool

AI-Powered Discovery

Architecture Drift Detection

MCP Server Integration

Architecture as Code

Architecture Change Requests

Architecture Insights

How Archyl compares

Interactive C4 diagrams

AI architecture discovery

Architecture drift detection

Architecture as Code (YAML)

MCP server for AI agents

Change request workflows

DORA metrics & releases

Free plan available

Frequently asked questions

Everything you need to know about the C4 model and Archyl.

What is the C4 model for software architecture?

The C4 model is a hierarchical approach to visualizing software architecture created by Simon Brown. It uses four levels of abstraction -- Context, Containers, Components, and Code -- to describe a system from the broadest overview down to implementation details. It is technology-agnostic and works for any software system.