The C4 Model: Visualizing Software Architecture

The C4 Model: Visualizing Software Architecture

by Simon Brown & Susanne Kaiser

Applied Sciences & Engineering Computing & Cybersecurity UMComputer programmingUMZSoftware Engineering
🎙 Simon Brown & Susanne Kaiser 👥 1.1M 📅 June 18, 2026 ⏱ 27 min 👁 3K 📄 interview 🧭 2026-08-02
Available in: English (current) Français

Keywords

C4 modelarchitecture diagramssystem contextcontainersmicroservices

Summary

In this interview, Simon Brown, the creator of the C4 model, discusses the origins, purpose, and practical application of the C4 model for visualizing software architecture. He explains that the model emerged from his frustration with unclear architecture diagrams and his need for a structured approach to handover documentation. The C4 model consists of four levels: context, containers, components, and code. Brown emphasizes that teams should primarily focus on the top two levels (context and container diagrams) as they are stable and provide high value, while the lower levels are more volatile and often not worth the maintenance effort. He also discusses the importance of including technology choices in diagrams, as they are architecturally significant. Brown recommends starting with a context diagram and gradually moving to container diagrams, using simple tools like whiteboards. He addresses how to model microservices, suggesting that services owned by the team are containers, while external services are modeled as opaque systems. The interview also touches on the collaborative nature of diagramming and the potential role of AI in generating diagrams. The conversation concludes with Brown’s key takeaway: start with the top two levels and only go deeper if it adds value.

196 words

Critical Evaluation

The interview provides valuable insights into the C4 model from its creator, Simon Brown. The discussion is practical and grounded in real-world consulting experience, offering clear guidance on how to apply the model effectively. Brown’s emphasis on starting with context and container diagrams is well-argued, as these levels are less volatile and provide immediate value. The advice on including technology choices in diagrams is particularly insightful, as it aligns with the architectural significance of such decisions. The conversation also addresses common challenges, such as modeling microservices, and offers pragmatic solutions. The quality of information is high, given Brown’s authority on the subject. However, the interview format limits the depth of technical detail, and some points are anecdotal rather than empirically validated. The sources cited in the description are relevant and provide additional resources for further exploration. Overall, the content is rigorous and practical, making it a valuable resource for software architects and developers. The title accurately reflects the content, and the structure with chapters enhances accessibility. The video does not contain any promotional segments. The public comments, if any, were not provided, so no analysis of audience reception is included.

190 words

Title / Content Match

The title accurately reflects the content, which focuses on the C4 model and its application in visualizing software architecture.

Quality & Reliability

8/10

The interview features the creator of the C4 model, providing authoritative insights. The discussion is practical and grounded in real-world experience. The video is well-structured with clear chapters, and the description includes relevant resources. However, it is an interview rather than a peer-reviewed source, and some claims are anecdotal.

Chapters

Cited Sources

  • C4 Model — Official website for the C4 model, providing detailed documentation and examples.
  • Structurizr — Tooling for creating C4 model diagrams, mentioned by Simon Brown.
  • Simon Brown's Website — Personal website of Simon Brown, with additional resources and articles.
  • Susanne Kaiser's Website — Personal website of Susanne Kaiser, host of the interview.
  • GOTO Book Club — The series this interview is part of.

Concurring Sources

  • C4 Model — The official C4 model website aligns with the interview's explanations.
  • Structurizr — Structurizr is the tooling associated with C4, as mentioned in the interview.

External References

Contribution & Novelties

The interview provides a concise and authoritative overview of the C4 model, emphasizing practical advice on its adoption. The key novelty is the emphasis on starting with only the top two levels (context and container) to avoid maintenance overhead, and the guidance on modeling microservices as containers or opaque systems. The discussion also highlights the importance of including technology choices in diagrams, which is often overlooked.

Pour aller plus loin :

  • C4 Model — Official site with detailed explanations and examples.
  • Structurizr — Tooling for C4 diagrams, including a DSL for code-based diagram generation.
  • Simon Brown’s blog — Articles and talks on software architecture and diagramming.
  • Domain-Driven Design — Related concept for modeling complex domains.
  • UML — The predecessor that C4 aims to simplify.

124 words

Radar Profile

The radar profile shows high scores in information quantity, quality, and reliability, with a slightly lower score in technical depth, reflecting the interview's practical focus rather than deep technical detail.

Reliability 8/10