Diagram Designer Alternatives

yEd is a free desktop application to quickly create, import, edit, and automatically arrange diagrams. It runs on Windows, Mac OS X, and Unix/Linux.

Online diagramming application

Open Source

GEES is an all-in-one AI design platform that is shaping a future where you can brainstorm, design, hand-off in one file — without changing any other tools.

Visit website freemium

LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.

OmniGraffle is for creating precise graphics like website wireframes, an electrical system designs, or mapping out software class.

Dia is a GTK+ based diagram creation program for GNU/Linux, MacOS X, Unix, and Windows, and is released under the GPL license.

UMLGraph is a professional automated drawing tool that allows the designers the declarative specification and drawing of UML class and sequence diagram.

PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.

Open Source

ArgoUML, free and safe download. ArgoUML latest version: Open-source diagramming application for personal computers. ArgoUML is a program that allows users to create complex and professional diagrams.

StarUML

UMLet - Free UML Tool for Fast UML Diagrams

Visualize, design, innovate. The ultimate diagramming and modeling suite for UML, ERD, BPMN, flowcharting and data architecture. Elevate your ideas to new heights.

freemium €59.0 / One-off (Standard Edition)

NClass is a free tool to easily create UML class diagrams with full C# and Java language support.

Umbrello UML Modeller is a Unified Modelling Language diagram programme for KDE.