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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 Professional?

Astah Professional is a desktop modeling application from Change Vision, Inc. for organizations that design software and systems. It brings UML 2.x, ER diagrams, data flow diagrams, flowcharts, requirement diagrams, CRUD, and mind maps together in one product, which reduces the number of tools a team needs to license and learn. Because Astah stores designs as models rather than drawings, an update made in one place carries through to every related diagram. This keeps design documentation consistent as projects change. Version 12.0, released in July 2026, brings AI into the modeling workflow. 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, so AI usage stays under the contracts you already manage. Local MCP server integration lets AI agents connect to your Astah models. Licenses are available monthly, annually, or as a perpetual license, starting at $11.99 per month. Astah Professional runs on Windows, macOS, and Linux without a separate Java installation, and a 20-day free trial is available.

Media

Media

Integrations Supported

Integrations Supported

Azure OpenAI Service
C#
C++
Claude
Claude Duet
Claude for Legal
Gemini
HTML
Java
Mermaid
Microsoft 365
Microsoft Excel
OpenAI
PHP
Redmine

API Availability

API Availability

Pricing Information

$0
Free Version

Pricing Information

$11.99 per month
Available from $11.99 per month.
Monthly, annual, or perpetual licenses. 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-professional/

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
Flowchart
For Developers
Mind Map
Multi-User Collaboration
Templates

Flowchart

Diagramming
Drag & Drop
Templates
Text to Chart

Mind Mapping

Brainstorming
Flowchart
Project Planning
Templates

Process Mapping

Not specified

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