Freedom251 › Simulation Software
ExtendSim
What ExtendSim is
ExtendSim is process simulation software for exploring how systems work and assessing possible improvements. It helps decision-makers compare design options and determine system configurations using customizable modeling logic, hierarchical subsystems, and interactive user interfaces. The feature set includes reusable custom blocks, model hierarchies, animation during simulation, 35 built-in distributions, and statistical analysis tools. Data exchange options cover Excel, ODBC and ADO databases, FTP, and text files; Scenario Manager can export results to JMP or Minitab.
ExtendSim is a Windows application, and its standard licenses require 64-bit Windows 10 or Windows 11. ARM configurations are not officially supported. Mac users can run it only by installing Windows with an emulator such as Parallels or Boot Camp. A 30-day trial begins at first launch and is limited to the person who downloaded it. Trial mode disables Multicore Analysis, places a watermark on models, and cannot run on virtual machines.
Individual license choices include Analysis RunTime, CP, DE, and Pro, with the first year of Maintenance & Support included. Pro adds discrete-rate and reliability block diagramming to DE, while DE adds message-based discrete-event architecture to CP. The Cloud subscription allows model configuration and execution, but not model building.
Who it suits
ExtendSim suits decision-makers who need to model operations, compare design options, and examine system configurations. It also fits users who need customizable model logic, statistical analysis, or data exchange with the listed databases and tools.
What it does well
- Supports customizable logic and hierarchical subsystems.
- Includes simulation animation and reusable custom blocks.
- Provides 35 built-in distributions and statistical analysis tools.
- Exchanges data with Excel, ODBC, ADO, FTP, and text files.
- Scenario Manager exports results to JMP or Minitab.
What to know first
- Standard licenses require 64-bit Windows 10 or Windows 11.
- ARM configurations are not officially supported.
- Trial mode disables Multicore Analysis and adds a model watermark.
- Cloud subscriptions cannot be used to build models.
Limits
The trial lasts 30 days from first launch, is limited to the downloader, disables Multicore Analysis, adds a watermark to models, and does not run on virtual machines. ExtendSim Cloud supports configuring and running models, but not building them.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| ExtendSim Cloud (up to 4 instances) | annual subscription · up to 4 concurrent instances · customer-built front end required | $10,000 a year |
| ExtendSim Cloud Subscription (up to 4 instances) | Up to 4 instances · renewal $10,000/year | $10,000 |
| ExtendSim Cloud (up to 32 instances) | annual subscription · up to 32 concurrent instances · customer-built front end required | $25,000 a year |
| ExtendSim Cloud Subscription (up to 32 instances) | Up to 32 instances · renewal $25,000/year | $25,000 |
| ExtendSim DE (Individual) | one-time license; first-year MSP included · CP features · message-based discrete-event simulation · advanced resource management | $3,495, paid once |
| Analysis RunTime (Individual) | one-time license; first-year MSP included · runs models built in ExtendSim Pro, DE or CP | $495, paid once |
| ExtendSim Pro (Individual) | one-time license; first-year MSP included · DE features · discrete-rate simulation · reliability block diagramming · advanced simulation technologies | $4,995, paid once |
| OEM license | starts at $50,000/year · embed the ExtendSim simulation engine in your application | $50,000 a year |
The first 8 of 9 plans, as extendsim.com lists them, read 15 Oct 2026. The maker's own page has the final word. Every plan
Getting started
- Visit the ExtendSim website.
- Choose an Individual license or a Cloud subscription.
- For a standard license, use a 64-bit Windows 10 or Windows 11 system.
- To try the software, download the trial and launch it; the 30-day period starts on first launch.
- On a Mac, install Windows using an emulator such as Parallels or Boot Camp.
Verdict
Choose ExtendSim if you need configurable process simulation, statistical analysis, and tools for exploring system configurations. Look elsewhere if you need model building in the cloud or a standard license for an ARM system.
Questions
How much does ExtendSim cost?
Individual licenses are listed at $495, paid once for Analysis RunTime, $995, paid once for CP, $3,495, paid once for DE, and $4,995, paid once for Pro. Each includes the first year of the Maintenance & Support Plan. Cloud subscriptions are priced on request for up to 4 instances or price on request for up to 32 instances; renewal is $10,000/year or $25,000/year, respectively.
Is there a free plan or trial?
There is no free plan. A 30-day trial is available and begins at first launch.
Which platforms does ExtendSim support?
The listed platforms are web and Windows. Standard licenses require 64-bit Windows 10 or Windows 11, and ARM configurations are not officially supported. On a Mac, ExtendSim can run only after installing Windows through an emulator such as Parallels or Boot Camp.
What is the difference between CP, DE, and Pro?
DE adds message-based discrete-event architecture to CP. Pro adds discrete-rate and reliability block diagramming capabilities to DE.
Can I build models in ExtendSim Cloud?
No. ExtendSim Cloud supports configuring and running models, but not model building.
What support is included?
The annual Maintenance & Support Plan includes basic usage and troubleshooting support, updates, and license activation key assistance. The maker also provides guides, videos, sample models, manuals, in-app help, FAQs, forums, and blogs.
Facts from ExtendSim's own pages
- API and SDK
- ExtendSim exposes a rich API with thousands of built-in functions and an integrated development environment for compiled blocks. · extendsim.com, 15 Oct 2026
- Cloud API
- ExtendSim Cloud provides an HTTP API for spawning instances, loading models, configuring and running scenarios, and returning JSON results. · extendsim.com, 15 Oct 2026
- Cloud limitation
- Cloud users cannot build models or blocks or change model structure, and the licensee must develop the front-end interface. · extendsim.com, 15 Oct 2026
- Cloud limits
- ExtendSim Cloud does not support model building and allows models to be configured and run. · extendsim.com, 8 Oct 2026
- Cloud security
- Cloud client access uses authenticated user groups and JWT tokens, with a license manager controlling concurrent instances. · extendsim.com, 15 Oct 2026
- Cloud technology
- The Cloud services manager is built with Node.js, stores client information in MongoDB and supports Python, JavaScript or C# front ends. · extendsim.com, 15 Oct 2026
- Company founding
- LinkedIn lists ExtendSim as founded in 1987 and headquartered in Alpharetta, Georgia. · linkedin.com, 15 Oct 2026
- Company history
- Imagine That Inc. was founded in 1987 to develop Extend and ExtendSim, and ANDRITZ Inc. acquired the ExtendSim family in 2024. · extendsim.com, 8 Oct 2026
- Company size
- LinkedIn lists ExtendSim as a software-development company with 2–10 employees. · linkedin.com, 15 Oct 2026
- Current release
- The official legacy page identifies ExtendSim 2026 as the current release and ExtendSim 2024 as a legacy version. · extendsim.com, 15 Oct 2026
- Custom blocks
- An integrated authoring environment lets users create reusable blocks, components, custom dialogs and icons, then save them in libraries. · extendsim.com, 15 Oct 2026
- Data management
- The software provides an internal relational database with linked tables and multiple data import and export methods. · extendsim.com, 15 Oct 2026
- Documentation
- Documentation includes product-specific Quick Start Guides, User and Technical References, block help, tool tips, FAQs, videos and sample models. · extendsim.com, 15 Oct 2026
- External analysis
- Scenario Manager can export analysis to JMP and Minitab, and model data can be exchanged dynamically with Excel. · extendsim.com, 15 Oct 2026
- Features
- The feature page lists reusable custom blocks, model hierarchies, simulation animation, 35 built-in distributions, and statistical analysis tools. · extendsim.com, 8 Oct 2026
- Founded
- 1987 · extendsim.com, 28 Sept 2026
- Graphical modeling
- Users build models by connecting graphical blocks, with on-screen results, reports and integrated animation. · extendsim.com, 15 Oct 2026
- Headquarters
- ANDRITZ Inc. is listed at 13560 Morris Road, Suite 1250, Alpharetta, GA 30004 USA. · extendsim.com, 8 Oct 2026
- Hierarchy
- Models can contain unlimited hierarchical layers and reusable submodels saved as hierarchical blocks. · extendsim.com, 15 Oct 2026
- Independent comparison
- Gitnux characterizes ExtendSim as suited to throughput, queueing and operational-policy questions, with limits in continuous-physics depth and large-model authoring speed. · gitnux.org, 15 Oct 2026
- Installer security
- The official installer is digitally signed and verified by ANDRITZ, although Windows SmartScreen may warn on newly released installers. · extendsim.com, 15 Oct 2026
- Integrations
- Official connectivity includes Excel, Microsoft Access, Oracle, MySQL, SQL Server, XML and FTP through ODBC or ADO interfaces. · extendsim.com, 15 Oct 2026
- Interactive runs
- Model parameters and logic can be changed while a simulation is running, without a code-generation phase. · extendsim.com, 15 Oct 2026
- License limits
- An Individual license is for one identified user on one computer, and shared use or network or internet use is prohibited under that license option. · extendsim.com, 8 Oct 2026
Where ExtendSim stands on Freedom251
- Simulation Software#5 of 69
- Business Simulation Software#9 of 26