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ASCEND

ASCEND · founded 1978

Plans and prices

ASCEND

Free

Free open-source software

Every plan, in full

On the record

Authoring tools
Yesascend4.org · read 21 Sep 2026
Automation
ASCEND exposes its interface through C, C++, and Python, and users can automate model loading and solving with Python scripts.ascend4.org · read 11 Oct 2026
Current release
The homepage identifies version 0.9.8 as the current version.ascend4.org · read 11 Oct 2026
Data export
Yesascend4.org · read 21 Sep 2026
Delivery mode
desktopascend4.org · read 21 Sep 2026
Extensions
External libraries can add solvers, integrators, methods, relations, and import handlers; external methods can also be written in Python.ascend4.org · read 11 Oct 2026
GUI
The GUI lets users load models, choose a solver or integrator, and inspect how the model is solved.ascend4.org · read 11 Oct 2026
License
ASCEND is released under the General Public License.ascend4.org · read 11 Oct 2026
Modeling
It lets users build complex models from simpler submodels using a special-purpose modeling language.ascend4.org · read 11 Oct 2026
Problem types
It can solve nonlinear equations, linear and nonlinear optimization problems, and dynamic systems expressed as differential/algebraic equations.ascend4.org · read 11 Oct 2026
Purpose
ASCEND solves systems of equations and is aimed at engineers and scientists.ascend4.org · read 11 Oct 2026
Support
The site invites users to report bugs, contact the team, and contribute models and other work.ascend4.org · read 11 Oct 2026
Thermodynamics
It includes thermodynamics capabilities for distillation and flash problems and integrates IAPWS-IF97 steam tables.ascend4.org · read 11 Oct 2026
Units
ASCEND handles units of measurement and converts between units such as inches, feet, centimeters, meters, and kilometers.ascend4.org · read 11 Oct 2026

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