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ExtendSim

extendsim.com

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Spec score 9.0 #2 of 69 in Simulation Software

What it is

ExtendSim is process simulation software for decision-makers assessing improvement opportunities and system configurations. It supports customizable modeling logic, hierarchical subsystems, interactive user interfaces and exploration of design options. Features include reusable custom blocks, model hierarchies, simulation animation, 35 built-in distributions and statistical analysis tools. Data exchange options include Excel, ODBC and ADO databases, FTP and text files; Scenario Manager can export results to JMP or Minitab. ExtendSim Pro adds discrete-rate and reliability block diagramming capabilities to DE, while DE adds message-based discrete-event architecture to CP. It is a Windows application, with web also listed as a platform. Standard licenses require 64-bit Windows 10 or Windows 11; ARM configurations are not officially supported. Mac use requires installing Windows with an emulator such as Parallels or Boot Camp. The trial lasts 30 days from first launch and is limited to the downloader; it disables Multicore Analysis, watermarks models and cannot run on virtual machines. Individual license options are one-time purchases, with first-year Maintenance & Support included; CP costs $995, paid once, DE $3,495, paid once and Pro $4,995, paid once.

Spec sheet

What it does
ExtendSim is a modular simulation environment for modeling, simulating, analyzing and optimizing physical and logical processes.Read 15 Oct 2026 · andritz.com
Purpose
ExtendSim simulates processes to help decision-makers assess opportunities for improvement and determine system configurations.Read 8 Oct 2026 · extendsim.com
Trial
The trial runs for 30 days from first launch and is limited to the person who downloaded it.Read 8 Oct 2026 · extendsim.com
Integrations
Official connectivity includes Excel, Microsoft Access, Oracle, MySQL, SQL Server, XML and FTP through ODBC or ADO interfaces.Read 15 Oct 2026 · extendsim.com
Support
The annual Maintenance & Support Plan covers download and installation help, troubleshooting, updates, upgrades and refreshed activation keys.Read 15 Oct 2026 · extendsim.com
Headquarters
ANDRITZ Inc. is listed at 13560 Morris Road, Suite 1250, Alpharetta, GA 30004 USA.Read 8 Oct 2026 · extendsim.com
Founded
1987Read 28 Sep 2026 · extendsim.com
API and SDK
ExtendSim exposes a rich API with thousands of built-in functions and an integrated development environment for compiled blocks.Read 15 Oct 2026 · extendsim.com
Cloud API
ExtendSim Cloud provides an HTTP API for spawning instances, loading models, configuring and running scenarios, and returning JSON results.Read 15 Oct 2026 · extendsim.com
Cloud limitation
Cloud users cannot build models or blocks or change model structure, and the licensee must develop the front-end interface.Read 15 Oct 2026 · extendsim.com
Cloud limits
ExtendSim Cloud does not support model building and allows models to be configured and run.Read 8 Oct 2026 · extendsim.com
Cloud security
Cloud client access uses authenticated user groups and JWT tokens, with a license manager controlling concurrent instances.Read 15 Oct 2026 · extendsim.com
Cloud technology
The Cloud services manager is built with Node.js, stores client information in MongoDB and supports Python, JavaScript or C# front ends.Read 15 Oct 2026 · extendsim.com
Company founding
LinkedIn lists ExtendSim as founded in 1987 and headquartered in Alpharetta, Georgia.Read 15 Oct 2026 · linkedin.com
Company history
Imagine That Inc. was founded in 1987 to develop Extend and ExtendSim, and ANDRITZ Inc. acquired the ExtendSim family in 2024.Read 8 Oct 2026 · extendsim.com
Company size
LinkedIn lists ExtendSim as a software-development company with 2–10 employees.Read 15 Oct 2026 · linkedin.com
Current release
The official legacy page identifies ExtendSim 2026 as the current release and ExtendSim 2024 as a legacy version.Read 15 Oct 2026 · extendsim.com
Custom blocks
An integrated authoring environment lets users create reusable blocks, components, custom dialogs and icons, then save them in libraries.Read 15 Oct 2026 · extendsim.com
Data management
The software provides an internal relational database with linked tables and multiple data import and export methods.Read 15 Oct 2026 · extendsim.com
Documentation
Documentation includes product-specific Quick Start Guides, User and Technical References, block help, tool tips, FAQs, videos and sample models.Read 15 Oct 2026 · extendsim.com
External analysis
Scenario Manager can export analysis to JMP and Minitab, and model data can be exchanged dynamically with Excel.Read 15 Oct 2026 · extendsim.com
Features
The feature page lists reusable custom blocks, model hierarchies, simulation animation, 35 built-in distributions, and statistical analysis tools.Read 8 Oct 2026 · extendsim.com
Graphical modeling
Users build models by connecting graphical blocks, with on-screen results, reports and integrated animation.Read 15 Oct 2026 · extendsim.com
Hierarchy
Models can contain unlimited hierarchical layers and reusable submodels saved as hierarchical blocks.Read 15 Oct 2026 · extendsim.com
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.Read 15 Oct 2026 · gitnux.org
Installer security
The official installer is digitally signed and verified by ANDRITZ, although Windows SmartScreen may warn on newly released installers.Read 15 Oct 2026 · extendsim.com
Interactive runs
Model parameters and logic can be changed while a simulation is running, without a code-generation phase.Read 15 Oct 2026 · extendsim.com
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.Read 8 Oct 2026 · extendsim.com
License policy
Individual licenses are restricted to one identified user on one computer, while floating licenses are priced per concurrent user and node-locked licenses per device.Read 15 Oct 2026 · extendsim.com
Limit: interface and usability
G2 feedback includes complaints that the interface feels outdated, block creation is difficult and the software is not always user friendly.Read 15 Oct 2026 · g2.com
Limit: specialized modeling
The Capterra reviewer wanted more intuitive agent-based modeling and network-simulation capabilities.Read 15 Oct 2026 · capterra.com
Limit: visualization
A Naval Postgraduate School comparison describes ExtendSim as having limited 3D visualization and a primary industrial focus.Read 15 Oct 2026 · calhoun.nps.edu
Mac support
ExtendSim is a Windows application and can run on a Mac only by installing Windows with an emulator such as Parallels or Boot Camp.Read 8 Oct 2026 · extendsim.com
Modeling
The software supports customizable modeling logic, hierarchical subsystems, interactive user interfaces, and exploration of design options.Read 8 Oct 2026 · extendsim.com
Modeling methods
The product line supports continuous, discrete-event, discrete-rate and agent-based simulation.Read 15 Oct 2026 · g2.com
Modules
ExtendSim Pro adds discrete-rate and reliability block diagramming capabilities to DE, while DE adds message-based discrete-event architecture to CP.Read 8 Oct 2026 · extendsim.com
Open-source components
ExtendSim is commercial software, but the maker says most block components are open source and can be modified or extended.Read 15 Oct 2026 · extendsim.com
Optimization
ExtendSim includes an integrated evolutionary optimizer, sensitivity analysis and scenario experimentation tools.Read 15 Oct 2026 · extendsim.com
Ownership change
ANDRITZ announced on March 22, 2023 that it acquired Imagine That Inc., the California company behind ExtendSim.Read 15 Oct 2026 · andritz.com
Platform
The current system requirements specify 64-bit Windows 10 or Windows 11 for standard licenses; ARM configurations are not officially supported.Read 8 Oct 2026 · extendsim.com
Praise: customization and data
The Capterra reviewer praises graphical customization, reusable block libraries, Excel and database connectivity, statistics and raw-data export.Read 15 Oct 2026 · capterra.com
Praise: learning and documentation
G2 reviewers repeatedly praise ease of learning, flexibility and comprehensive documentation, including extensive manuals and tutorials.Read 15 Oct 2026 · g2.com
Rating on Capterra
5.0 out of 5 from 1 reviewRead 15 Oct 2026 · capterra.com
Rating on G2
3.9 out of 5 from 10 reviewsRead 15 Oct 2026 · g2.com
Rating on GetApp
5.0 out of 5 from 1 reviewRead 15 Oct 2026 · getapp.com
Reliability
The Pro package integrates reliability block diagramming with process-flow simulation and supports reliability event-cycle analysis.Read 15 Oct 2026 · extendsim.com
Support resources
The maker provides Quick Start guides, videos, sample models, manuals, an in-app help system, FAQs, forums, and blogs.Read 8 Oct 2026 · extendsim.com
System requirements
The desktop product requires 64-bit Windows 10 or 11, at least 4 GB RAM and 500 MB disk space; ARM Windows is not officially supported.Read 15 Oct 2026 · extendsim.com
Trial limits
Trial mode disables Multicore Analysis, displays a watermark on models, and does not run on virtual machines.Read 8 Oct 2026 · extendsim.com
Trial terms
The trial is an Individual license usable only by the downloader for 30 days and may not be installed on a server or redistributed.Read 15 Oct 2026 · extendsim.com

Plans and prices

Analysis RunTime (Individual) $495, paid once one-time license; first-year MSP included runs models built in ExtendSim Pro, DE or CP Read 15 Oct 2026 · extendsim.com
ExtendSim CP (Individual) $995, paid once one-time license; first-year MSP included continuous-process modeling · internal relational database · optimizer · scenario manager · multicore analysis Read 15 Oct 2026 · extendsim.com
ExtendSim DE (Individual) $3,495, paid once one-time license; first-year MSP included CP features · message-based discrete-event simulation · advanced resource management Read 15 Oct 2026 · extendsim.com
ExtendSim Pro (Individual) $4,995, paid once one-time license; first-year MSP included DE features · discrete-rate simulation · reliability block diagramming · advanced simulation technologies Read 15 Oct 2026 · extendsim.com
ExtendSim Cloud Subscription (up to 4 instances) Priced on request Up to 4 instances · renewal $10,000/year Read 8 Oct 2026 · extendsim.com
ExtendSim Cloud (up to 4 instances) $10,000 a year annual subscription up to 4 concurrent instances · customer-built front end required Read 15 Oct 2026 · extendsim.com
ExtendSim Cloud Subscription (up to 32 instances) Priced on request Up to 32 instances · renewal $25,000/year Read 8 Oct 2026 · extendsim.com
ExtendSim Cloud (up to 32 instances) $25,000 a year annual subscription up to 32 concurrent instances · customer-built front end required Read 15 Oct 2026 · extendsim.com
OEM license $50,000 a year starts at $50,000/year embed the ExtendSim simulation engine in your application Read 15 Oct 2026 · extendsim.com
OEM License $50,000 a year $50,000 /year starting price Right to embed the ExtendSim simulation engine in your application Read 8 Oct 2026 · extendsim.com

Every ExtendSim plan and price →

Strong points and limits

Strong points

  • Supports customizable logic and hierarchical subsystems.
  • Includes 35 built-in distributions.
  • Scenario Manager exports results to JMP or Minitab.
  • First-year Maintenance & Support is included with individual licenses.

Limits

  • Standard licenses require 64-bit Windows 10 or 11.
  • ARM configurations are not officially supported.
  • Trial mode disables Multicore Analysis and watermarks models.
  • Individual licenses prohibit shared or network use.

Who it suits

ExtendSim suits decision-makers and modelers exploring process improvements or system configurations. Its data exchange and statistical analysis features may also suit teams working with spreadsheets, databases or Scenario Manager exports.

Verdict

ExtendSim offers detailed process-modeling and analysis capabilities, with different architectures across CP, DE and Pro. Check Windows requirements and individual-license restrictions before choosing a one-time purchase.

Where Specifiction places it

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