Duke Systems AB is a Swedish company that has distributed ExtendSim in Scandinavia since 1988. It describes itself as the official Nordic Reseller for ANDRITZ Inc. ExtendSim, covering Sweden, Norway, Denmark, and Finland. Rather than simply selling software, it provides consulting services around simulation modeling, optimization, training, AI integration, and IT infrastructure.
In the context of developer tools and engineering simulation, the core offering is ExtendSim and related services. ExtendSim CP is designed for continuous process simulation; DE adds discrete-event simulation and discrete-rate technology; Pro adds Reliability Block Diagram functionality for MTBF and reliability analysis. The site also introduces ExtendSim MCP, which is based on the Model Context Protocol and allows AI assistants such as Claude, ChatGPT, and Microsoft Copilot to drive ExtendSim models through natural language—for example, running demand-growth scenarios, identifying bottlenecks, and exporting Excel reports. However, the page does not disclose specific APIs, SDKs, deployment architecture, or security mechanisms.
Pricing is not public; users need to contact the company for a quote. Licensing options include Standalone licenses for single-machine use and Network/Concurrent licenses for shared network-based use. The latter may be better suited to teams with intermittent simulation needs, as it can help share usage costs. MCP integration explicitly requires an existing ExtendSim license.
The advantages are its long industry experience, coverage of licensing, training, model building, analysis and optimization, and long-term support, as well as the ability to serve Nordic customers in Swedish. The AI/MCP integration adds a natural-language interaction layer to traditional simulation workflows. The downside is that the publicly available information is fairly marketing-oriented, with limited technical documentation, interface specifications, pricing, SLA details, or deployment information. Its open-source status is not stated, and it appears to lean more toward a commercial closed-source ecosystem.
It is best suited to Nordic organizations in manufacturing, logistics, healthcare, process industries, research and education, and energy and power—especially teams that need local ExtendSim support, simulation project delivery, or AI-assisted simulation workflows. If you are simply looking for a general-purpose open-source developer tool or a low-cost SaaS product, it is unlikely to be a strong fit.
The website does not clarify access from mainland China, payment options, or local support, so these should be considered unknown. Chinese users should also factor in cross-border communication, procurement processes, and the convenience of remote support. Comparable simulation tools include AnyLogic, FlexSim, Simul8, Arena Simulation, and MATLAB Simulink.
⚠ This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on duke.se official site.
duke.se is an Sweden Dev Tools provider. TG4G tracks its product information, an overall rating of 6.0/10, and a China-accessibility score of Limited (proxy recommended). Click "Visit Official Site" to reach duke.se directly.