Top Alternatives to UMLet

Lucidchart is a leading web-based diagramming software that empowers individuals and teams to create complex visual representations of ideas, systems, and processes. It offers extensive shape libraries, real-time collaboration features, and seamless integration with popular productivity tools, making it ideal for flowcharts, UML diagrams, wireframes, and more.

Microsoft Visio is a powerful diagramming tool designed to simplify complex information through visual representations like flowcharts, network diagrams, and floor plans. It is a key part of the Microsoft Office suite, offering a wide range of stencils and templates for various industries and needs.

PlantUML is an open-source tool that allows users to generate a wide variety of UML and other diagram types from a simple human-readable text description. It supports sequences, use case, class, activity, component, state, object, deployment, timing diagrams, and more, making it accessible and efficient for technical documentation and visualization.

Graphviz is a powerful open-source graph visualization software package. It allows users to create complex diagrams and graphs from descriptive text files using the DOT language. Ideal for professionals, researchers, and developers needing to represent structured information visually.

StarUML is a robust modeling platform supporting a wide range of diagrams including UML, SysML, and BPMN. It offers powerful features for software engineering, data modeling, and business process modeling.

Umbrello UML Modeller is a comprehensive, free, and open-source UML diagram tool. It provides robust capabilities for creating a wide range of UML and other modeling diagrams, supporting developers and designers in visualizing complex systems.

Visual Paradigm is a comprehensive modeling and design tool for software development, enterprise architecture, and business process analysis. It supports a wide range of diagramming notations including UML, BPMN, ERD, and more, facilitating code generation, reverse engineering, and team collaboration.

Software Ideas Modeler is a comprehensive CASE and UML tool designed for creating a wide range of diagrams, facilitating software design, analysis, and documentation. It supports numerous modeling languages and features like code generation, team collaboration, and extensive customization via plugins, making it suitable for various development workflows.

Astah Community Edition is a free, powerful modeling tool supporting a wide range of diagram types beyond just UML, designed for individuals and small teams.

WhiteStarUML is a comprehensive, open-source UML modeling tool designed for software developers and system architects. It supports a wide range of UML diagrams and offers features like code generation and reverse engineering.