CODESYS vs GX Works3 Comparison: Reviews, Features, Pricing & Alternatives in 2026

Detailed side-by-side comparison to help you choose the right solution for your team

Updated May 2026 8 min read

CODESYS

0.0 (0 reviews)

CODESYS is a comprehensive hardware-independent automation software providing a complete development environment for creating industrial control applications based on the international IEC 61131-3 programming standard.

Starting at Free
Free Trial NO FREE TRIAL
VS

GX Works3

0.0 (0 reviews)

GX Works3 is a comprehensive configuration and programming software designed to simplify the setup, maintenance, and operation of Mitsubishi Electric MELSEC iQ-R and iQ-F series programmable logic controllers.

Starting at --
Free Trial 30 days

Quick Comparison

Feature CODESYS GX Works3
Website codesys.com mitsubishielectric.com
Pricing Model Freemium One_time
Starting Price Free Custom Pricing
FREE Trial ✘ No free trial ✓ 30 days free trial
Free Plan ✓ Has free plan ✘ No free plan
Product Demo ✓ Request demo here ✓ Request demo here
Deployment desktop on-premise desktop
Integrations OPC UA MQTT EtherCAT PROFINET EtherNet/IP CANopen Modbus Microsoft Azure AWS Git GT Works3 MT Works2 RT ToolBox3 FR Configurator2 Microsoft Excel
Target Users small-business mid-market enterprise small-business mid-market enterprise
Target Industries manufacturing energy automotive manufacturing automotive food-and-beverage
Customer Count 0 0
Founded Year 1994 1921
Headquarters Kempten, Germany Tokyo, Japan

Overview

C

CODESYS

CODESYS provides you with a complete development environment for industrial automation. Instead of being locked into specific hardware, you can program controllers from different manufacturers using a single, standardized tool. You can develop applications using all five IEC 61131-3 programming languages, allowing you to choose the best method for your specific logic needs, whether it is ladder logic or structured text.

The platform handles everything from basic PLC programming to complex motion control and safety functions. You can also design integrated web-based visualizations to monitor your machines from any device. It is widely used by machine builders, system integrators, and hardware manufacturers who need a flexible, professional-grade environment to manage modern industrial internet of things (IIoT) requirements.

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GX Works3

GX Works3 is the latest generation of system design and programming software from Mitsubishi Electric, specifically built for the MELSEC iQ-R and iQ-F series. You can manage your entire automation lifecycle—from initial system design and hardware configuration to complex programming and long-term maintenance—within a single, integrated environment. The software focuses on reducing engineering costs by providing a highly intuitive, graphics-based configuration tool that lets you visualize your hardware setup instantly.

You can choose from multiple programming languages like Ladder, Structured Text, and Function Block Diagram to suit your specific project needs. The platform includes a powerful simulation engine, allowing you to test your code and hardware logic in a virtual environment before deploying to the factory floor. This helps you catch errors early, reduce commissioning time, and ensure your industrial processes run smoothly from day one.

Overview

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CODESYS Features

  • IEC 61131-3 Programming Develop your applications using all five standard programming languages including Ladder Diagram and Structured Text within one integrated tool.
  • Integrated Visualization Create professional user interfaces directly in the development environment to monitor and operate your machines via web browsers.
  • Fieldbus Configurator Configure common industrial networks like EtherCAT, PROFINET, and EtherNet/IP without needing external third-party software tools.
  • Motion Control Program complex multi-axis movements and CNC functions using integrated libraries that follow PLCopen standards for precision.
  • Safety Integration Develop safety-critical applications within the same environment to meet SIL2 or SIL3 requirements for your industrial machinery.
  • IIoT Connectivity Connect your controllers to the cloud using built-in protocols like MQTT and OPC UA for real-time data analysis.
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GX Works3 Features

  • Module Configuration. Drag and drop hardware components to create a visual representation of your system while the software handles internal addressing automatically.
  • Integrated Simulation. Test your program logic and monitor device states in a virtual PLC environment without needing any physical hardware on your desk.
  • Multi-Language Support. Write your code using Ladder, Structured Text, or Function Block Diagrams, and even mix different languages within the same project.
  • Global Label Management. Create and share labels across different program parts and even other software like GT Works3 to ensure data consistency.
  • System Monitor. Troubleshoot your system in real-time with detailed diagnostic tools that highlight errors and provide suggested solutions for quick recovery.
  • Safety Configuration. Set up and manage your safety CPU and remote I/O modules within the same interface to simplify your safety logic implementation.

Pricing Comparison

C

CODESYS Pricing

Development System
$0
  • All IEC 61131-3 languages
  • Integrated fieldbus configurators
  • Basic visualization editor
  • Simulation mode
  • Free software updates
G

GX Works3 Pricing

Pros & Cons

M

CODESYS

Pros

  • Hardware independence allows you to switch controller brands easily
  • Free base development software reduces your initial project costs
  • Standardized programming makes it easier to find skilled engineering talent
  • Extensive library ecosystem speeds up your application development time

Cons

  • Steep learning curve for users new to IEC standards
  • Store-based licensing can be confusing for first-time buyers
  • Documentation is technically dense and requires prior automation knowledge
A

GX Works3

Pros

  • Intuitive graphical interface simplifies complex hardware configuration
  • Powerful simulation tools reduce on-site commissioning time
  • Seamless integration with other Mitsubishi Electric automation hardware
  • Extensive library of pre-built function blocks saves time
  • Robust diagnostic tools make troubleshooting significantly faster

Cons

  • Large installation size requires significant disk space
  • High initial license cost for small shops
  • Learning curve when transitioning from older GX Works2
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