Four ways to make a diagram
The biggest difference between diagram apps isn't the price or the template count. It's how you put a diagram together. Pick the way that suits the job, then the app.
Sketch by hand
A freehand canvas: draw boxes and arrows the way you would on a whiteboard.
Good for
- Thinking out loud in a meeting or workshop
- Rough architecture before anyone commits
- Diagrams that should look unfinished on purpose
Gets in the way of
- Keeping a big diagram tidy as it grows
- Exact alignment and consistent shapes
- Diagrams that must match a formal notation
6 apps work this way
Drag shapes
Shape libraries and connectors that snap: flowcharts, UML, network maps.
Good for
- Flowcharts, org charts and network maps people will print
- Formal notations: UML, BPMN, ER, cloud icons
- Pixel-exact layouts for documents and slides
Gets in the way of
- Changing structure late: moving one box means re-routing many lines
- Reviewing changes: a diagram file doesn't diff well
- Keeping docs in step with code
16 apps work this way
Write code
Type text like A --> B and the app draws it. Diagrams live next to your code.
Good for
- Diagrams that live next to code and get reviewed in pull requests
- Sequence and state diagrams that change often
- Rendering the same source in docs, wikis and READMEs
Gets in the way of
- Fine control over where each box sits
- People who don't want to learn a syntax
- Free-form or decorative layouts
8 apps work this way
flowchart LR
A[Idea] --> B{Ready?}
B --> C[Ship]
Describe in words
Write what you want in plain language and AI draws the first version.
Good for
- A fast first draft from a paragraph or a spec
- People who know what they want to show but not how to draw it
- Turning written explanations into visuals for slides and articles
Gets in the way of
- Exact structure: you still check every box and arrow
- Formal notations where the details matter
- Free use: AI drawing is often limited by credits
17 apps work this way
"Idea to ship, with a check that it's ready."
AI draws it
