xtb VS psi4

Compare xtb vs psi4 and see what are their differences.

psi4

Open-Source Quantum Chemistry – an electronic structure package in C++ driven by Python (by psi4)
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xtb psi4
3 2
525 920
2.9% 3.3%
8.3 8.7
about 23 hours ago 7 days ago
Fortran C++
GNU Lesser General Public License v3.0 only GNU Lesser General Public License v3.0 only
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

xtb

Posts with mentions or reviews of xtb. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2021-01-16.
  • Coordination chemistry simulations
    1 project | /r/comp_chem | 18 May 2023
    Have you tried using GFN2-xTB (https://github.com/grimme-lab/xtb)? It is essentially the fastest method you could use, after forcefields, but is designed as general-purpose tool. I haven't tested it with Zn, but it's worth a try.
  • CompChem Project Ideas for an Undergrad?
    1 project | /r/comp_chem | 24 Mar 2023
    I would recommend getting xtb (https://github.com/grimme-lab/xtb) and exploring some possibilities. The calculations are lightning-fast, so you have a quick feedback loop and you can quickly test different ideas. You can look at recent publications to get an idea of what people are doing.
  • Considering Julia versus Fortran for a project
    4 projects | /r/Julia | 16 Jan 2021
    the xtb and dftb programs are actually excellent example of well-written, clear, modern fortran codes. I've learned more from reading these codes than from any other resources.

psi4

Posts with mentions or reviews of psi4. We have used some of these posts to build our list of alternatives and similar projects.

What are some alternatives?

When comparing xtb and psi4 you can also consider the following projects:

nwchem - NWChem: Open Source High-Performance Computational Chemistry

gcc

espresso - The ESPResSo package

msthesis - My Master's Thesis in Applied Math, numerically solving a PDE about light and seaweed!

BOUT-dev - BOUT++: Plasma fluid finite-difference simulation code in curvilinear coordinate systems

awesome-python-chemistry - A curated list of Python packages related to chemistry

HartreeFock - A program implementing the Hartree–Fock (also post-HF: MP2, CCSD(T), CIS and TDHF/RPA)/self-consistent field method (also DIIS) with Gaussian orbitals

Q6 - Q6 Repository -- EVB, FEP and LIE simulator.

openbabel - Open Babel is a chemical toolbox designed to speak the many languages of chemical data.