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What is Merit Modeler?

Merit Modeler is a free desktop application that facilitates the creation of Flowcharts, Use Case diagrams, and Data Flow diagrams. This software significantly improves your capacity to visualize processes, document software architectures, and express ideas clearly. By running directly on your computer, it guarantees speed and security, operating fully offline without requiring any subscriptions or online accounts. Furthermore, its intuitive interface makes it easy to navigate for users of all skill levels, from novices to advanced professionals. The combination of these features makes Merit Modeler an invaluable tool for anyone involved in design or documentation tasks.

What is Astah UML?

Astah UML is a desktop UML 2.x modeling application from Change Vision, Inc. It is designed for development teams, universities, and individual engineers who need standard UML diagrams without the complexity of a full systems-engineering suite. Because designs are stored as models, an update made in one place carries through to every related diagram, which keeps design documentation consistent as a project grows. Version 12.0, released in July 2026, brings AI into UML modeling. AI Chat Copilot and AI-assisted code reverse engineering run on your organization's own API key for OpenAI, Azure OpenAI, Claude, or Gemini, or for an OpenAI-compatible service. Local MCP server integration lets AI agents connect to Astah models. Plans start at $6.99 per month. A free license is available for students, and a 20-day free trial is offered. Astah UML runs on Windows, macOS, and Linux without a separate Java installation.

Media

Media

Integrations Supported

Integrations Supported

Azure OpenAI Service
Claude
Gemini
HTML
Java
OpenAI
Redmine

API Availability

API Availability

Has API

Pricing Information

$0
Free Version

Pricing Information

$6.99 per month
Plans from $6.99 per month. Free license for students. 20-day free trial.
Free Trial Offered?

Supported Platforms

Windows
Mac
Linux

Supported Platforms

Windows
Mac
On-Prem
Linux

Customer Service / Support

Web-Based Support

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub

Company Facts

Organization Name

Ideamerit s.r.o.

Company Website

www.datensen.com/products/merit-modeler/

Company Facts

Organization Name

Change Vision, Inc.

Date Founded

2006

Company Location

Tokyo, Japan

Company Website

astah.net/products/astah-uml/

Categories and Features

Diagram

Drag & Drop
Flowchart
For Developers
Organizational Charting

Flowchart

Diagramming
Drag & Drop
Organizational Charting
Process Mapping

Categories and Features

Diagram

Data Import / Export
Drag & Drop
For Developers
Mind Map
Templates

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