PlantUML review (2026): is it any good?
Draw UML and other diagrams from plain-text descriptions
PlantUML report card
Very good · out of 4.0 · graded Nov 12, 2026
Best for text-described UML and other diagrams
PlantUML turns a few lines of text into sequence, class, activity and other diagrams, and it costs nothing. But you write code to draw, the engine decides where things sit, and there's no canvas for freehand sketching. If you want to drag boxes around, look elsewhere.
Who PlantUML is for
- Fits if you want diagrams stored as text next to your code
- Works for teams documenting systems in wikis or Markdown
Who PlantUML is not for
- Skip it if you want to drag shapes around a canvas
- Not for you if you sketch freehand, because it has no whiteboard
- Watch out: layout is decided by the engine, so fine control over placement is limited
- Watch out: only the GPL build has every feature, and other license builds lack some such as ditaa
Why PlantUML gets a 3.0
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- AValue for moneyFree and open source, with a jar anyone can download or an online editor. Nothing to pay, whatever the category's $5 to $10 a month.
- AFree plan and trialThe whole tool is free, under GPL, LGPL, Apache, BSD, EPL or MIT licenses, so there's no cap to hit.
- CFeaturesUML plus Gantt, mind maps and wireframes from text. But the FAQ admits you get less say over layout, there's no visual canvas, and non-GPL builds lose some features like ditaa.
- CEase of useYou have to learn its text language before you get a diagram, and no store rating is on record. The in-browser editor takes some of the sting out.
- BPlatforms and integrationsRuns in a browser and through a jar, with links into Confluence, MediaWiki, IntelliJ IDEA, Eclipse and GitHub. No phone app or desktop app of its own is listed.
What these grades rest on. Graded from this listing, whose facts were read from PlantUML's own pages on 12 November 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
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<a href="https://toolgpa.com/tools/plantuml#review"><img src="https://toolgpa.com/badge/plantuml.svg" alt="PlantUML: 3.0 GPA on ToolGPA" width="196" height="56"></a>Where PlantUML stands among whiteboard and mind map tools
PlantUML's GPA of 3.0 is higher than 53 of the 61 other whiteboard and mind map tools we grade, and level with 5.
It stands best on free plan and trial (A, above 53 of 61) and worst on features (C, above 0).
PlantUML has no paid plan.
On features, ease of use and platforms it scores 2.3 out of 4. Nothing scores higher for less, though at least one tool matches that score at a lower price.
Each grade against the category
Every bar is all 62 whiteboard and mind map tools we grade, cut by the letter each got. PlantUML’s own letter is outlined.
- AValue for moneyAbove 47 of 61, level with 14
- AFree plan and trialAbove 53 of 61, level with 8
- CFeaturesAbove 0 of 61, level with 42
- CEase of useAbove 0 of 61, level with 44
- BPlatforms and integrationsAbove 22 of 61, level with 31
Price against what you get
Each dot is one of 55 whiteboard and mind map tools. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep PlantUML, or make your own?
Keep it
PlantUML is free, so making your own would save you nothing.
And it is not the kind of software a weekend replaces. It is one of the better ones too: its GPA of 3.0 is higher than 53 of the 61 other whiteboard and mind map tools we grade.
What you could make
- Mind mapping and Gantt & timelines: an app builder makes these well.
What you could not
- A diagram editor.
- It plugs into other products, Confluence, MediaWiki and WordPress among them.
What this rests on. PlantUML’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is PlantUML?
PlantUML is an open-source tool that turns short text descriptions into diagrams. It covers UML types such as sequence, class and activity diagrams, plus non-UML ones such as Gantt charts, mind maps and wireframes. It is free, and the project offers an online editor, a downloadable jar and integrations with many wikis and editors.
Worth knowing
- Layout is controlled by the engine; the FAQ says it gives less control over placement than drag-and-drop tools.
- Diagrams are written in code, so there is no visual canvas for freehand sketching.
- Builds under licenses other than GPL lack some features, such as the ditaa integration.
Key features
- Text-to-diagram language
- Diagrams are written as short text and drawn from it, so changing the text updates the picture.
- UML and non-UML diagrams
- Supports sequence, use case, class, object, activity, component, deployment, state and timing diagrams, plus Gantt, MindMap, WBS, wireframe and others.
- In-browser editor
- The home page has an editor that runs in the browser with a JavaScript rendering engine and redraws as the code changes.
- Many integrations
- The Running page lists connections to wikis and forums, editors and IDEs, including Confluence, MediaWiki, IntelliJ IDEA and Eclipse.
- Several license options
- The download page offers jars under GPL, LGPL, Apache, BSD, EPL and MIT; the GPL build is the one with every feature, such as ditaa.
PlantUML pricing
As of Nov 12, 2026, PlantUML is free to use.
- Starts at
- Free
- Free plan
- Free of charge and open source, under several license options including GPL, LGPL, Apache, BSD, EPL and MIT.
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| Open source | $0 | Free jar and source code under your choice of license; you run it yourself or use the online editor. |
Read from plantuml.com on Nov 12, 2026. Prices change, so confirm with PlantUML before you buy.
Works with
- Confluence
- MediaWiki
- WordPress
- IntelliJ IDEA
- Eclipse
- GitHub
- GitLab
- Slack
PlantUML alternatives
- PlantUML vs Mermaid
Free plan · from $10/mo
- PlantUML vs Eraser
Free plan · from $45/mo
- PlantUML vs Flowchart Fun
Free plan · from $2/mo
- PlantUML vs Visual Paradigm
Free plan · from $6/mo
Common questions
Does PlantUML have an Android app?
No Android app was listed when its pages were read on Nov 12, 2026. PlantUML is listed for Web.
Does PlantUML have an iPhone app?
No iPhone app was listed when its pages were read on Nov 12, 2026. PlantUML is listed for Web.
Is PlantUML open source?
Yes. PlantUML is open source, according to its own site.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 12, 2026.