Compare the Top Free Molecular Modeling Software as of July 2025

What is Free Molecular Modeling Software?

Molecular modeling software is software used by chemists and biologists to visualize, simulate, and predict the properties of molecules. It can be used to design new drug molecules or study existing ones. The software uses computational algorithms and graphical user interfaces to depict molecular structure, as well as analyze functions such as bond lengths, angles, and energies. It can also simulate molecular dynamics processes to understand chemical reactivity on a molecular level. Compare and read user reviews of the best Free Molecular Modeling software currently available using the table below. This list is updated regularly.

  • 1
    SYNTHIA Retrosynthesis Software
    Expert-coded by chemists and engineered by computer scientists, SYNTHIA™ Retrosynthesis Software enables scientists to quickly find and easily navigate innovative and novel pathways for novel and published target molecules. Quickly and efficiently scan hundreds of pathways to help you identify the best option according to your needs. Explore the most cost-effective routes to your target molecules with state of the art visualization and filtering options. Easily customize search parameters to eliminate or promote reactions, reagents or classes of molecules. Explore unique and innovative syntheses that may be unknown for building your desired molecule. Easily generate a list of commercially available starting materials for your synthesis. Benefit from ISO/IEC 27001 Information Security Certification to guarantee the confidentiality, integrity, and protection of your data.
    Starting Price: €0 / 30 days
  • 2
    YASARA

    YASARA

    YASARA

    YASARA is a molecular graphics, modeling, and simulation program for Windows, Linux, MacOS, and Android developed in 1993, that finally makes it really easy to answer your questions. With an intuitive user interface, photorealistic graphics, and support for affordable virtual reality headsets, shutter glasses, autostereoscopic displays, and input devices, YASARA creates a new level of interaction with the 'artificial reality', that allows you to focus on your goal and forget about the details of the program. YASARA is powered by PVL (Portable Vector Language), a new development framework that provides performance way above traditional software. PVL allows you to visualize even the largest proteins and enables true interactive real-time simulations with highly accurate force fields on standard PCs, making use of GPUs if available. You can push and pull molecules around and work with dynamic models instead of static pictures.
    Starting Price: Free
  • 3
    MolView

    MolView

    MolView

    MolView is an intuitive, Open-Source web application to make science and education more awesome! MolView is mainly intended as a web-based data visualization platform. You can use MolView to search through different scientific databases including compound databases, protein databases and spectral databases, and view records from these databases as interactive visualizations using WebGL and HTML5 technologies. This web application is built on top of the JavaScript libraries and online services listed below. The Virtual Model Kit has been a source of inspiration for the birth of this project.
    Starting Price: Free
  • 4
    ArgusLab

    ArgusLab

    ArgusLab

    ArgusLab is a molecular modeling, graphics, and drug design program for Windows operating systems. It’s getting a little dated by now, but remains surprisingly popular. To date, there are more than 20,000 downloads. ArgusLab is freely licensed. You don’t need to sign anything. You can use as many copies as you need if you are teaching a class where your students might benefit from using ArgusLab. You are not allowed to redistribute ArgusLab from other websites or sources. However, you may link to this website from your own websites if you like. A low-key effort is currently underway to port ArgusLab to the iPad. In addition, I’ve done some work with the Qt cross-platform development environment in an effort to support Mac, PC, and Linux.
    Starting Price: Free
  • 5
    Ascalaph Designer

    Ascalaph Designer

    Agile Molecule

    Ascalaph Designer is a general-purpose program for molecular dynamic simulations. Under a single graphical environment are represented as their own implementation of molecular dynamics as well as the methods of classical and quantum mechanics of popular programs. Molecular geometry optimization with conjugate gradient methods. Shows molecular models in separate windows. Each window has two cameras, which allow the model to be simultaneously visualized from two sides and in different graphic modes. The subwindow can be opened by dragging the splitter in the right corner of each graphical window. Clicking on an atom or bond with the left mouse button slightly changes their color and a brief info about the picked object appears in the status bar. The wire-frame style is convenient for large molecules, particularly, proteins. Drawing is very fast for this style. Finally, CPK wire frame combines the properties of several above styles.
    Starting Price: Free
  • 6
    PyMOL

    PyMOL

    PyMOL

    PyMOL is a user-sponsored molecular visualization system on an open-source foundation, maintained and distributed by Schrödinger. PyQt interface replaces Tcl/Tk and MacPyMOL on all platforms. Better third-party plugin and custom scripting support. A comprehensive software package for rendering and animating 3D structures. A plug-in for embedding 3D images and animations into PowerPoint presentations. PyMOL is a commercial product, but we make most of its source code freely available under a permissive license. The open-source project is maintained by Schrödinger and ultimately funded by everyone who purchases a PyMOL license. Open access incentive executables. Liberal evaluation policy. Improved fuse command (disallows hypervalent bonds, substitutes monovalent atoms instead of attaching to them) Properties inspector now supports unsetting settings with the “delete” key. Fix workspace disappearing on specific display resolutions.
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