5 tools compared
Best PlantUML Alternatives in 2026
PlantUML (PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams) isn't the right fit for everyone. Below are 5 real alternatives pulled straight from our PlantUML profile.
| # | Tool | Pricing | Platforms |
|---|---|---|---|
| 1 | LucidChart | — | — |
| 2 | Dia | — | — |
| 3 | OmniGraffle | — | |
| 4 | yEd | — | |
| 5 | draw.io | Open source |
1. LucidChart
LucidChart is built for users looking to create, collaborate on, and publish flowcharts and diagrams directly from a web browser. It stands out with a user-friendly interface, cross-platform web browser access, and robust collaboration tools that include real-time editing and commenting.
Full LucidChart profile →2. Dia
Dia is a GTK+ based diagram creation program suited for users who need a free and open-source tool released under the GPL license. It provides support for a wide range of diagram types such as flowcharts, network diagrams, and UML diagrams. Users can also utilize a customizable toolset to create custom shapes and objects for specific projects, backed by extensive documentation and an active user community.
Full Dia profile →3. OmniGraffle
OmniGraffle is built for creating precise graphics like website wireframes, electrical system designs, and software class maps. It stands out with a user-friendly interface that offers a minimal learning curve, alongside advanced diagram tools such as customizable templates, Bézier lines, and powerful styling options. Users also benefit from cross-platform support on macOS and iOS, integration capabilities that include exporting to different formats and APIs for automation, and frequent updates from The Omni Group.
Full OmniGraffle profile →4. yEd
yEd is a free desktop application well-suited for individuals and organizations working within budget constraints who need to create, import, edit, and automatically arrange diagrams. It stands out with a user-friendly interface that minimizes the learning curve, alongside powerful automatic layout algorithms designed to quickly organize complex structures into clear diagrams. The software supports versatile diagram types such as flowcharts, UML diagrams, and network diagrams to accommodate a wide variety of documentation needs.
Full yEd profile →5. draw.io
draw.io is an online diagramming application built for users who need to create flowcharts, UML diagrams, and network diagrams directly in a web browser without requiring any installation. The platform features an intuitive drag-and-drop interface, customizability for shapes, styles, and templates, and real-time collaboration capabilities that allow multiple users to work on the same diagram simultaneously. It integrates directly with cloud storage services such as Google Drive, OneDrive, and Dropbox.
Full draw.io profile →