Xcos review
Free, open-source system modeling across continuous, discrete, hybrid, and Modelica workflows.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Xcos is a graphical editor and simulator for designing, loading, saving, compiling, and simulating hybrid dynamical-system models. It is distributed with the free, open-source Scilab software and is suited to engineering, science, academic, and industrial users who need general system modeling rather than a narrow physics-only environment. Model construction uses graphical block diagrams, with applications spanning mechanical systems, hydraulic circuits, control systems, signal processing, and electronics.
The published Free plan includes Xcos as part of Scilab and provides open-source software rather than a separate paid product structure. Its modeling scope is broad: users can work with discrete, continuous, symbolic-equation, and combined hybrid systems. Standard block palettes cover signal processing, electrical, hydraulic, derivative, and integral models. Users can also customize standard blocks and create new user-defined blocks, giving the tool more authoring depth than a simulator limited to fixed examples. Modelica-based modeling is supported, along with model compilation, simulation, and loading and saving.
Xcos also connects modeling with result inspection through real-time graphical viewing and Scilab post-processing of simulation data. It runs on Windows, macOS, and Linux, with offline desktop access suited to local engineering workflows. The trade-off is focus: Xcos is a general system-modeling environment, not a lesson-led physics platform, and its desktop delivery may not fit teams seeking browser-first collaboration. Choose Xcos for free engineering system modeling across multiple physical domains, especially when customization and Scilab post-processing matter. Buyers who need guided lessons or a browser-based workflow should consider a different type of product.
Xcos pros and cons
- Where it wins
- Free, open-source desktop software distributed with Scilab
- Supports continuous, discrete, symbolic-equation, and hybrid simulation
- Custom blocks, Modelica modeling, and Scilab post-processing
- Where it doesn't
- Desktop delivery may not suit browser-first teams
- Requires working within the Scilab ecosystem
- No lesson library for guided learning
Xcos fact sheet, pricing and score →
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