What is Diagrams used for?

Diagrams lets you draw cloud system architecture diagrams in Python code. It is a good fit for prototyping a new system architecture and describing or visualizing an existing system architecture.

Is Diagrams open source?

Yes. Diagrams is open source under the MIT licence. Its source code is on GitHub at mingrammer/diagrams and is written mainly in Python.

Yes. Diagrams is open source, so the software itself is free to use.

Can I self-host Diagrams?

Yes. Diagrams can be self-hosted on your own server or infrastructure.

What is Diagrams an alternative to?

Diagrams is an open-source alternative to Eraser. Other open-source alternatives to Eraser include Excalidraw and draw.io.

Is Diagrams actively maintained?

Yes. The most recent commit to Diagrams was on 8 October 2026, and the latest release is v0.25.1, published on 22 November 2025. The project has 43k stars on GitHub.

Diagrams: open-source alternative to Eraser

About Diagrams

Diagrams is a Python library that allows users to draw cloud system architecture diagrams as code. It was created for prototyping new system architectures without the need for design tools, and can also be used to describe or visualize existing system architectures.

The library supports major cloud providers including AWS, Azure, GCP, Kubernetes, Alibaba Cloud, and Oracle Cloud, as well as on-premises nodes, SaaS, and major programming frameworks and languages. It does not control actual cloud resources or generate infrastructure code; it is solely for drawing diagrams.

Key features

Draw cloud system architecture diagrams in Python code
Prototype new system architectures without design tools
Track architecture diagram changes in version control systems
Support for major cloud providers: AWS, Azure, GCP, Kubernetes, Alibaba Cloud, Oracle Cloud
Support for on-premises nodes, SaaS, and major programming frameworks and languages

Good fit for

Prototyping a new system architecture
Describing or visualizing an existing system architecture

Built with: Python tools
Tags: diagram; cloud-architecture; python; infrastructure; prototyping; version-control

Diagrams: questions and answers

What is Diagrams used for?: Diagrams lets you draw cloud system architecture diagrams in Python code. It is a good fit for prototyping a new system architecture and describing or visualizing an existing system architecture.
Is Diagrams open source?: Yes. Diagrams is open source under the MIT licence. Its source code is on GitHub at mingrammer/diagrams and is written mainly in Python.
Is Diagrams free?: Yes. Diagrams is open source, so the software itself is free to use.
Can I self-host Diagrams?: Yes. Diagrams can be self-hosted on your own server or infrastructure.
What is Diagrams an alternative to?: Diagrams is an open-source alternative to Eraser. Other open-source alternatives to Eraser include Excalidraw and draw.io.
Is Diagrams actively maintained?: Yes. The most recent commit to Diagrams was on 8 October 2026, and the latest release is v0.25.1, published on 22 November 2025. The project has 43k stars on GitHub.