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%

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