Best UML Products in 2025

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

Key PlantUML features:

Simple Syntax Quick Diagram Creation Version Control Friendly Integrations

Open Source

Create diagrams and visualizations using text and code.

Key Mermaid features:

Ease of Use Integration Automated Diagrams Cost-effective

Open Source

Modelio is an open source modeling tool supporting natively UML, BPMN and model exchange with XMI.

Key Modelio features:

Open Source Wide Range of Modeling Standards Extensible Built-In Code Generation

BOUML : An UML toolbox running under Linux, MacOS X and Windows to specify and generate code in C++, Java, Php, Python, Idl and MySQL.

Key BOUML features:

Lightweight and Fast Cross-Platform Compatibility Extensible Free to Use

StarUML.

Key StarUML features:

User-Friendly Interface Cross-Platform Support Extensibility Wide Range of Diagram Types

Discover YAKINDU Statechart Tools – a free statechart tool for the specification and development based on the concept of state machines.

Key Yakindu Statechart Tools features:

User-Friendly Interface Integrated Development Environment Code Generation Rich Feature Set

UML Designer provides a set of common diagrams to work with UML 2.5 models.

Key UML Designer features:

Open Source Integration with Eclipse Comprehensive Features Community Support

The IYOPRO BPM Platform is a comprehensive online BPM Suite based on the BPMN 2.0 standard. The IYOPRO PLM Components combine innovative process management with solid PDM technology.

Key IYOPRO features:

User-Friendly Interface Cloud-Based Solution Comprehensive BPMN Support Collaboration Features

ARIS Express is based on the proven ARIS methodology and industry standards.

Key ARIS Express features:

Free of Cost User-Friendly Interface Quick Start Basic Functionalities

Diagramo is an online flowchart software - diagrams (create, edit and share).

Key Diagramo features:

Open Source Web-Based Collaboration Intuitive Interface

JavaScript based diagramming tool that renders Markdown-inspired text definitions to create and modify sequence diagrams dynamically.

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.

Key LucidChart features:

User-Friendly Interface Collaboration Features Integration Capabilities Template Library

Online diagramming application.

Key draw.io features:

Free User-Friendly Interface Collaboration Integrations

Open Source