Is PlantUML a modelling tool?

It is a diagram renderer rather than a modelling tool, and that is a design choice rather than a gap. It produces a picture from a description; it does not hold a model that several pictures are views of, so there is nothing to query, validate across diagrams, or export as a model.

Can I move from PlantUML to Archyno?

Not automatically today. Archyno exports Mermaid, XMI, ArchiMate Exchange and Sparx .qea, but it does not import PlantUML source, and no import path exists in either direction. Treat a move as a redraw, which for a handful of diagrams is an afternoon.

Comparison

Archyno vs PlantUML

PlantUML turns text into a diagram. Archyno keeps a model and draws views of it. That is the whole comparison, and which one you want depends on whether your diagrams have to agree with each other.

What PlantUML is

PlantUML is an open-source tool that draws UML diagrams from a plain-text description. You write a few lines, it renders sequence, use case, class, object, activity, component, deployment, state or timing diagrams, plus ArchiMate. It is free, it has no licence to manage, and the text lives wherever your other text lives.

What PlantUML does better

It is free and open source, with nothing to buy and no account to create.
The source is text, so a diagram lives in the repository, appears in a pull request diff and reviews alongside the code it describes.
It renders anywhere - a CI job, a Markdown pipeline, an editor plugin - because rendering is all it does.

The difference that matters

PlantUML renders each diagram independently from its own source. There is no shared model underneath, so the same class appearing in three diagrams is three unrelated pieces of text: rename it and you edit three files, and nothing tells you when you have edited two. Archyno inverts that - one model, many views, and the rename is one edit that every view reflects. The cost is that Archyno's source is not a text file you can grep.

At a glance

Dimension	PlantUML	Archyno
How a diagram is authored	A text DSL, rendered to an image	Direct manipulation on a canvas, backed by a model
Relationship between two diagrams	None - each renders from its own source	One model; a view is a projection of it
Cost	Free and open source	Free tier, paid for collaboration and interop
Output	PNG, SVG, LaTeX, EPS, ASCII art	PNG, SVG, Mermaid, XMI, ArchiMate Exchange, Sparx .qea

Choose PlantUML when

Your diagrams are documentation attached to code, you want them in git, and each one standing alone is fine. PlantUML is the better tool for that job and it costs nothing.

Choose Archyno when

The same elements appear across several diagrams and have to stay consistent, or you need a standards export - XMI, ArchiMate Exchange, Sparx .qea - that a renderer does not produce.

Templates

Common questions

Is PlantUML a modelling tool?: It is a diagram renderer rather than a modelling tool, and that is a design choice rather than a gap. It produces a picture from a description; it does not hold a model that several pictures are views of, so there is nothing to query, validate across diagrams, or export as a model.
Can I move from PlantUML to Archyno?: Not automatically today. Archyno exports Mermaid, XMI, ArchiMate Exchange and Sparx .qea, but it does not import PlantUML source, and no import path exists in either direction. Treat a move as a redraw, which for a handful of diagrams is an afternoon.

Claims about PlantUML were checked against plantuml.com on 2026-08-09. Products change; verify anything that decides a purchase.

PlantUML is a product of the PlantUML project. We are not affiliated with them, and this page is written by Archyno.