List of the Top 4 Free PLC Programming Software in 2025

The OpenPLC Editor is a completely free and open-source application that complies with the IEC 61131-3 standard for editing programmable logic controllers (PLCs). This tool enables users to seamlessly upload their PLC code to any compatible hardware or system that utilizes OpenPLC Runtime. OpenPLC marks a transformative advancement in the realm of programmable logic controllers by providing an intuitive and fully open-source interface for both its software and hardware components. Developed in accordance with the IEC 61131-3 standard, it specifies essential programming languages and software architecture for PLCs. Its diverse applications span various sectors, including industrial automation, home automation, IoT projects, and SCADA research. The Runtime aspect is adaptable, functioning effectively on anything from basic microcontrollers like Arduino to more robust cloud server infrastructures. It is instrumental in running the PLC programs crafted by users within the Editor. Consequently, the OpenPLC Editor not only facilitates the design process but also empowers users to implement their PLC applications with confidence and efficiency. This level of accessibility and functionality makes OpenPLC a valuable asset for both beginners and experienced developers alike.

VTScada is an intuitive platform that empowers users to design tailored industrial monitoring and control applications that are reliable and straightforward for end-users to navigate. Employed across various sectors globally for critical operations, VTScada facilitates industrial users in overseeing and managing their equipment through a computer interface. This powerful software can effectively handle the operation of pumps and motors, as well as present fluid levels and temperatures on screens. HMI software, such as VTScada, is essential for managing remote devices and gathering process data. For instance, municipal utilities can utilize radio communications to oversee the distribution of water and monitor wastewater collection points spread across extensive geographical regions or connect through an Ethernet network. This versatility makes VTScada an invaluable tool in enhancing operational efficiency across diverse applications.

ISPSoft is an advanced software development tool specifically created for Delta's programmable logic controllers (PLC), conforming to the IEC 61131-3 standard to streamline the organization of different tasks within project management. It empowers users to employ both standard PLCopen® function blocks and Delta's exclusive function blocks, making it easy to address a variety of control requirements. The platform offers an intuitive and efficient development environment, which is well-suited for projects that range from straightforward systems to intricate control solutions. Additionally, it allows for the incorporation of symbols in both call-by-value and call-by-reference formats, which can be organized and stored separately. Multiple monitoring tables can be integrated into a single project, improving data management and accessibility. Users also have the option to create custom instructions specifically designed for various applications across different sectors. Furthermore, ISPSoft accommodates a range of interrupt types, such as cyclic, I/O, timer, and external interrupts, providing extensive choices for efficient task management. The software ensures that it delivers relevant tasks tailored to various CPU configurations and features rapid data logging capabilities, with intervals as brief as one CPU scan, significantly boosting operational performance. Ultimately, this all-encompassing tool enhances the efficiency of developing and overseeing control systems, making it a vital resource for professionals in the field.

ABB Automation Builder is an all-encompassing software suite tailored for machine builders and system integrators who seek to automate their systems and machinery with efficiency. By consolidating vital tools for configuration, programming, debugging, and project upkeep, Automation Builder greatly minimizes the primary expense associated with industrial automation projects: the time invested in software-related activities. The software facilitates the engineering of AC500 PLCs, AC500 safety PLCs, CP600 control panels, in addition to drives and motion control systems. With an intuitive setup, it streamlines installation configuration, while also overseeing software license registration, maintenance, and updates. Catering to a range of needs, Automation Builder offers versions from a basic (free) edition to standard and premium options, making it suitable for both smaller projects and the intricate challenges faced by OEMs and system integrators involved in larger operations. Users can initiate their experience with Automation Builder through a built-in 30-day trial license, which allows them to explore its features and functionalities before making a financial commitment. This adaptability guarantees that organizations can identify a version that aligns perfectly with their unique automation requirements and project goals, further enhancing operational efficiency. Ultimately, Automation Builder empowers users to innovate and streamline their automation processes, ensuring they remain competitive in a rapidly evolving industry.