A high-performance alternative to Gaussian for ab initio quantum chemistry computations. It combines a C++ core for heavy computation with a Python interface for workflow automation and rapid prototyping.
Tech Stack
C++Chemistry & Materials
Why psi4?
• High-performance C++ core
• Extensive Python API
• Symmetry-adapted perturbation theory
Limitations
• Memory intensive
• CLI-centric workflow
• Limited GUI options
3/5/2026
Last Update
489
Forks
434
Issues
LGPL-3.0
License
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