thermo
The premium Open Source alternative to Aspen HYSYS
🎯 Best for:Chemical engineering property calculations.
What is thermo?
Replaces the property calculation modules of Aspen Plus and HYSYS. It offers a comprehensive library of 20,000+ compounds with rigorous thermodynamic and phase equilibrium models.
Tech Stack
PythonChemistry & Materials
Why thermo?
- • Massive compound database
- • Rigorous EOS models
- • Pure Python/NumPy stack
Limitations
- • No graphical interface
- • Steep learning curve
- • Performance vs C++ engines
3/4/2026
Last Update
125
Forks
9
Issues
MIT
License
Financial Leak Detected
Stop the "SaaS Tax"
Your team could be burning cash. Switching to thermo instantly boosts your runway.
Competitor Cost
-$1,440
/ year (est. based on Aspen HYSYS)
Self-Hosted
$0
/ year
Team Size10 Users
150+
SAVE 100%