Open source
Alternatives to PlantUML
12 tools like PlantUML, chosen by what they do. About PlantUML
Open source
Freemium
Mermaid Chart
AI diagram editor for flowcharts, sequences and system designs
DiagrammingMermaid diagram editor
Open source
Structurizr
Models-as-code tool for C4 architecture diagrams from one DSL model
DiagrammingArchitecture diagrams as code
Open source
D2
Text-based diagram language that turns simple code into diagrams
DiagrammingDeclarative diagram language
Open source
Diagrams
Python library that draws cloud architecture diagrams as code
DiagrammingCloud diagrams in Python
Curated
Eraser
AI tool that turns prompts, code and files into technical diagrams
DiagrammingDiagrams for engineering docs
Open source
Graphviz
Draws graphs and networks from a simple text language
DiagrammingGraph visualization software
Open source
Free trial
IcePanel
Collaborative tool for C4 architecture diagrams and software models
DiagrammingC4 model architecture tool
Open source
draw.io
Free diagramming app for flowcharts with local or cloud storage
DesignDiagramming app, self-hostable
Open source
StackEdit
Open source Markdown editor that runs in your browser
Writing ToolsIn browser Markdown editorInactive