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FlexSim
San Francisco, California, USA
What it is
FlexSim is 3D discrete-event simulation software for modeling and improving existing or proposed systems. Realistic 3D graphics visualize system behavior, while drag-and-drop controls let users place objects and resources. CAD drawings and custom 3D objects can also be imported. The Standard Object Library and Process Flow activity blocks support model building; FlexScript and C++ integration add customization options. Analysis tools include charts, graphs, data tracking, and spreadsheet export. FlexSim integrates with OptQuest for scenario optimization using variables, constraints, and multiple objectives. The Experimenter compares scenarios, distributes replications across CPU cores, and supports reports and performance measures. Data can be imported or exported through Excel and SQL connectors, with FlexScript APIs for files, sockets, and HTTP requests. The Emulation tool supports Modbus, OPC DA, OPC UA, and certain manufacturer-specific PLC connections, though some require an Emulation license. FlexSim is listed for web and Windows, with desktop deployment. The Express trial plan costs nothing and is limited to 30 3D objects and 35 Process Flow activities. Other pricing is on request.
For and against
For
- 3D graphics visualize systems during simulation.
- Imports CAD drawings and custom 3D objects.
- Experimenter compares scenarios and distributes replications across CPU cores.
- OptQuest supports multiple objectives and constraints.
- Data connections include Excel and SQL.
Against
- Express trial is limited to 30 3D objects.
- Express trial is limited to 35 Process Flow activities.
- Some PLC connections require an Emulation license.
- Pricing is on request.
The verdict
FlexSim offers model-building, scenario analysis, and optimization tools for discrete-event simulations. Check the Express trial limits, Windows requirements, and licensing needs for Emulation connections before proceeding.
Who it suits
FlexSim may suit operations teams modeling system behavior, comparing scenarios, and exploring process changes. Its model-building tools support users who need to bring in CAD or custom 3D objects and connect to data sources.
Plans and prices
FlexSim Express (Trial Version)
Up to 30 3D objects · up to 35 Process Flow activities · no Experimenter or Optimizer · fixed random number generator
Read 9 Oct 2026 · docs.flexsim.com
On the record
- 3D modeling
- It uses realistic 3D graphics to model systems and visualize what is happening in simulations.flexsim.com · read 9 Oct 2026
- Analysis
- Analysis features include charts, graphs, data tracking, and export to spreadsheet applications.flexsim.com · read 9 Oct 2026
- Company history
- FlexSim says it began in 1993 and that Autodesk acquired FlexSim Software Products in November 2023.flexsim.com · read 9 Oct 2026
- Data connections
- FlexSim documentation describes importing and exporting data through Excel and SQL database connectors, plus FlexScript APIs for files, sockets, and HTTP requests.docs.flexsim.com · read 9 Oct 2026
- Experimentation
- The Experimenter compares scenarios, distributes replications across CPU cores, and supports report generation and performance measures.flexsim.com · read 9 Oct 2026
- Model building
- The Standard Object Library, Process Flow activity blocks, FlexScript, and C++ integration support model building and customization.flexsim.com · read 9 Oct 2026
- Model layout
- Users can place objects and resources with drag-and-drop controls and import CAD drawings and custom 3D objects.flexsim.com · read 9 Oct 2026
- Operating system
- The system requirements page lists 64-bit Windows editions and says FlexSim is not designed for virtual OS environments.docs.flexsim.com · read 9 Oct 2026
- Optimization
- FlexSim integrates with OptQuest for scenario optimization with variables, constraints, and multiple objectives.flexsim.com · read 9 Oct 2026
- PLC connectivity
- The Emulation tool supports connections including Modbus, OPC DA, OPC UA, and certain manufacturer-specific PLC types; some connection types require an Emulation license.docs.flexsim.com · read 9 Oct 2026
- Purpose
- FlexSim is 3D discrete-event simulation software for modeling and improving existing and proposed systems.flexsim.com · read 9 Oct 2026
- Security
- The product page links to Autodesk privacy and legal pages, but the opened FlexSim product and company pages do not state a security certification or compliance standard.flexsim.com · read 9 Oct 2026
- Support
- Technical support is included for customers with active maintenance or subscription, and the support page aims for a first response within two working days.flexsim.com · read 9 Oct 2026
- Trial
- The Autodesk trial intake page lists a 30-day trial from the date of download and Windows 64-bit as the available platform for FlexSim 2027.autodesk.com · read 9 Oct 2026
