About LikeC4
LikeC4 is an open source toolchain for describing software architecture in a text language. It turns those descriptions into interactive diagrams that you can embed in docs or share with a team.
What it does
You define systems, components, relationships and boundaries in a small DSL file kept in Git. LikeC4 builds views from that model, and the same source can drive a static site, a React component or an interactive web view. A validation step checks changes automatically, which helps catch architecture drift before it reaches a release.
Key features
- Architecture model in a clear DSL
- Interactive views you can drill into
- Git-friendly plain text files
- Automatic validation of changes
- MCP server so AI tools can read the architecture
Who it's for
LikeC4 suits software architects and development teams who want diagrams that stay in sync with their code. It is a good match for groups who already review changes through pull requests and want architecture reviews to follow the same process.
Pricing and good to know
LikeC4 is open source under the MIT license and free to use. You run its command line tools on your own machine, and you can embed the output in documentation or websites. The project also has a separate page for teams that want hosted collaboration, so check that page if you need shared editing.
Highlights
- Architecture model in a clear DSL
- Interactive views you can drill into
- Plain text files kept in Git
- Automatic validation of changes
- MCP server for AI tools
