Astah UML

Astah UML

Change Vision, Inc.
Tagsight

Tagsight

Tagsight Technologies
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About

Astah UML is a UML 2.x diagramming tool for software design, developed by Change Vision, Inc. It covers the core UML diagrams, including class, use case, sequence, activity, state machine, component, and deployment diagrams, plus mind maps. Astah creates models rather than drawings: when you change a model element, every diagram that uses it is updated, so your design stays consistent. AI features include AI Chat Copilot and AI-assisted code reverse engineering, which use your own API key for OpenAI, Azure OpenAI, Claude, Gemini, or an OpenAI-compatible service. A local MCP server lets external AI agents work with your Astah models. Conventional reverse engineering of Java, C#, and C++ code is also included. Astah UML runs on Windows, macOS, and Linux with a bundled Java runtime. A free license is available for students, and a 20-day free trial is available. Latest version: 12.0 (released July 15, 2026).

About

Tagsight is the system of record for engineering data. It reads your drawing set into the instrument index, I/O list, equipment list, line list, and valve list a project runs on. It reads P&IDs, single-line diagrams, loop diagrams, datasheets, and cable and junction-box schedules. Scanned sheets and CAD-exported PDFs read the same way. Every tag is classified to the standard the drawing already uses, whether that is ISA 5.1, KKS, IEC 81346, NORSOK, DIN 19227, or an operator-house convention. An engineer confirms or corrects each read before anything leaves the tool. The register is reviewed, not assumed. Tagsight exports to Excel, CSV, TIA Portal XML for Siemens S7, Rockwell L5X for Studio 5000, PLCCreator, DEXPI, JSON, and annotated PDF. It compares revisions so a Management of Change review shows only what changed. A REST API and an MCP server connect it to the rest of the toolchain.

Platforms Supported

Windows Supported
Mac Supported
Linux Supported
Cloud Not Supported
On-Premises Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Software developers, students, and teams who create UML diagrams for software design

Audience

Small Business, Medium Business, Enterprise (I&C engineering teams at EPCs, owner-operators, SIs)

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

Pricing

$6.99 per month
Plans from $6.99 per month. Free license for students. 20-day free trial.
Free Version Not Supported
Free Trial Supported

Pricing

Tagsight offers subscription and usage based pricing.
Free Version Not Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

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Reviews/Ratings

Overall 5.0 / 5
ease 4.0 / 5
features 5.0 / 5
design 5.0 / 5
support 5.0 / 5

Pros & Cons from Real Users

Pros

  • The drawing viewer and extracted tables being connected is probably the strongest part. Clicking through the results makes it much easier to check tags without constantly going back and forth between a PDF and Excel.

Cons

  • Some symbols and tags on crowded sections of the drawing were missed or needed correction.

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Change Vision, Inc.
Founded: 2006
Tokyo, Japan
astah.net/products/astah-uml/

Company Information

Tagsight Technologies
Founded: 2026
Canada
tagsight.io

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Categories

Diagram Supported

Categories

Engineering Supported

Diagram Features

Data Import / Export Supported
Drag & Drop Supported
Flowchart Not Supported
For Developers Supported
Mind Map Supported
Multi-User Collaboration Not Supported
Organizational Charting Not Supported
Templates Supported

Engineering Features

2D Drawing Supported
3D Modeling Not Supported
Chemical Engineering Not Supported
Civil Engineering Not Supported
Collaboration Supported
Design Analysis Not Supported
Design Export Not Supported
Document Management Supported
Electrical Engineering Not Supported
Mechanical Engineering Not Supported
Mechatronics Not Supported
Presentation Tools Not Supported
Structural Engineering Not Supported

Integrations

Azure OpenAI Service Supported
Claude Supported
Gemini Supported
HTML Supported
Java Supported
OpenAI Supported
Redmine Supported

Integrations

Azure OpenAI Service Not Supported
Claude Not Supported
Gemini Not Supported
HTML Not Supported
Java Not Supported
OpenAI Not Supported
Redmine Not Supported
Claim Astah UML and update features and information
Claim Astah UML and update features and information
Claim Tagsight and update features and information
Claim Tagsight and update features and information