The Molecular Sciences Software Institute

What The Molecular Sciences Software Institute does

The Molecular Sciences Software Institute (MolSSI) is a U.S. nonprofit research institute founded in 2016 and headquartered in Blacksburg, Virginia, affiliated with Virginia Tech. Its mission is to serve as a nexus for the development, maintenance, and dissemination of open-source software infrastructure for the global computational molecular sciences community — spanning quantum chemistry, molecular dynamics, biomolecular simulation, and materials science. MolSSI's core product portfolio comprises seven open-source projects: SEAMM (a user-friendly simulation environment), QCArchive (a centralized quantum chemistry data platform handling thousands to millions of computations), Basis Set Exchange (a basis set data repository with 10,000+ monthly visitors), MDI (a standardized driver/engine API for code-to-code communication), MMIC (a schema for classical molecular mechanics pipelines), MOPAC (a semi-empirical quantum chemistry package transitioned from commercial to open-source in 2023), and Descriptor Libraries (developed with the NSF Center for Computer Assisted Synthesis). These tools are written primarily in Python, C++, and C and distributed freely via GitHub and conda.

MolSSI's business model is grant-funded rather than commercial. The institute is supported by NSF grants CHE-2136142 and OAC-1547580, which fund software development, fellowships, education programs, and operations. The only commercial revenue is nominal: paid Udemy courses priced at $12.99 each (launched 2025) and prior industrial training engagements (e.g., Pfizer workshops in 2019). Go-to-market is community-led through open-source distribution, GitHub, online education portals, workshops across the U.S., Software Fellowship and ACT-CMS Faculty Fellowship programs, and a 13,500+ member LinkedIn group. The customer base is the academic computational molecular sciences research community — primarily graduate students, postdocs, faculty, and research scientists using the tools free of charge.

Governance is provided by a Board of Directors drawn from leading U.S. research universities (Virginia Tech, Rice, Stony Brook, UC Berkeley, Rutgers, USC, Cal Poly SLO, Iowa State, U. Michigan) and a separate Science & Software Advisory Board. MolSSI employs a small core team of PhD-level Software Scientists (Jessica Nash, Benjamin Pritchard, Taylor Barnes, Samuel Ellis) plus an annual cohort of Software Fellows at host universities. Recent strategic activity includes the launch of ACT-CMS (2024), an Intel partnership for GPU offload workshops (March 2025), two Udemy credentialed courses (2025), and ongoing collaboration with the NSF Center for Computer Assisted Synthesis.

Name

The Molecular Sciences Software Institute

Legal name

The Molecular Sciences Software Institute

Website

https://molssi.org

Company type

Private

Founded year

2016

Operating status

Operating

Headcount range

11–50 employees

Short description

MolSSI is a U.S. nonprofit, NSF-funded research institute founded in 2016 that develops and disseminates open-source software infrastructure, data platforms, and educational programs for the global computational molecular sciences research community.

Ownership category

akta.pro rank

Product category

Scientific Computing Software

NAICS

Scientific Research and Development Services (5417), Software Publishers (5132), Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) (541715), Computer Systems Design and Related Services (54151)

SIC

Services-Prepackaged Software (7372), Services-Commercial Physical & Biological Research (8731), Services-Computer Programming, Data Processing, Etc. (7370)

akta.pro primary industry

Knowledge Management & Scientific Collaboration / Literature Intelligence (HLAGAJAN)

akta.pro secondary industries

MOOC & Open Course Platforms (EDAFAIAA), Core LMS Platforms (Academic & Corporate) (EDAFAAAA)

Keywords

• Computational chemistry software
• Molecular dynamics tools
• Quantum chemistry platforms
• Scientific software infrastructure
• Open-source research software

Headquarters

HQ city

Blacksburg

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

Personnel, Technology or R&D, Operations, Marketing or Sales, Others

Revenue model

1. NSF Grant Funding: The Molecular Sciences Software Institute is supported by the U.S. National Science Foundation through grant numbers CHE-2136142 and OAC-1547580. These grants fund software development, education programs, fellowships, workshops, and operations. As a non-profit research institute, MolSSI does not generate commercial revenue from its software.
2. Udemy Course Revenue (Nominal): MolSSI has launched paid Udemy courses (e.g., 'Introduction to Quantum Chemistry Simulation' and 'C++ Project Management with CMake, CPack, and Beyond') priced at $12.99 each as a minor revenue stream supporting education outreach.

Pricing tiers

Go-to-market motion1 record

Distribution channels5 records

Marketing channels9 records

Core offering

The Molecular Sciences Software Institute (MolSSI) develops and supports open-source scientific software, data infrastructure, and educational programs for the global computational molecular sciences community. Its core deliverables include interoperable software tools (SEAMM, QCArchive, Basis Set Exchange, MDI, MMIC, MOPAC, Descriptor Libraries), standardized APIs enabling multi-code simulations, centralized curated data repositories, fellowship and faculty development programs, and training workshops and online courses on software best practices.

Product overview

MolSSI provides open-source software infrastructure and educational programs for the computational molecular sciences community. The core software portfolio includes SEAMM (a user-friendly simulation environment), QCArchive (quantum chemistry data platform), Basis Set Exchange (basis set data repository), MDI (interoperability interface for computational chemistry codes), MMIC (molecular mechanics component schema), MOPAC (semi-empirical quantum chemistry), and Descriptor Libraries (cheminformatics tools). Education initiatives include ACT-CMS curriculum transformation programs, Software Fellowships, Industrial Training Workshops, and online courses covering best practices and design patterns.

Differentiator

Problem solved

Functional benefit

Brands

• MolSSI: The Molecular Sciences Software Institute, commonly abbreviated as MolSSI, serves as a nexus for science, education, and cooperation for the global computational molecular sciences community.
• ACT-CMS

Products and services

• SEAMM (Simulation Environment for Atomistic and Molecular Modeling) User-friendly environment for computational molecular science providing building, simulation, and analysis tools for researchers in chemistry, physics, and materials science.
• QCArchive Central platform to compute, aggregate, search, and share quantum chemistry data at scale, with architecture spanning a central server (QCFractal), client interface (QCPortal), and computational workers (QCFractalCompute).
• Basis Set Exchange (BSE) Central repository enabling computation, aggregation, search, and exchange of standardized basis set data with unique identifiers for provenance and reproducibility; serves 10,000+ visitors per month.
• MDI (MolSSI Driver Interface) Standardized API (driver/engine paradigm) enabling fast, on-the-fly communication between computational chemistry codes for modular QM/MM, AIMD, machine learning, advanced sampling, and path integral MD simulations.
• MMIC (Molecular Mechanics Interoperable Components) API schema for defining the scientific and computational stages of classical molecular mechanics pipelines, enabling interoperability of MM/MD workflow components through structured I/O.
• MOPAC (Molecular Orbital PACkage) Semi-empirical quantum chemistry software covering most of the periodic table, including COSMO solvation model and MOZYME reduced-scaling solver for large-scale simulations; transitioned from commercial to open-source by MolSSI.
• Descriptor Libraries Full-stack cheminformatics application developed in collaboration with the NSF Center for Computer Assisted Synthesis for descriptor computation and synthesis planning.
• ACT-CMS (Accelerating Curricular Transformation in the Computational Molecular Sciences) Education and faculty development program transforming molecular science curricula by integrating programming and computation, featuring the Faculty Fellowship program with applications opening for 2026.
• MolSSI Software Fellowship Program Funded fellowship for advanced graduate students and postdocs developing software infrastructure, middleware, and frameworks for the broader field of computational molecular sciences.
• MolSSI Industrial Training Workshops Customized training workshops for industry professionals and researchers on computational molecular science software and best practices; delivered to organizations such as Pfizer.
• MolSSI Best Practices Education Online educational resources covering software best practices, object-oriented programming, design patterns (Adapter, Factory, Visitor, Facade, Observer, Composite), and software development methodology for computational molecular scientists.
• Object Oriented Programming and Design Patterns Course Self-paced course on the MolSSI education portal covering OOP principles, SOLID design, and software design patterns including Adapter, Factory, Visitor, Facade, Observer, and Composite patterns.
• Introduction to Quantum Chemistry Simulation (Udemy Course) First credentialed online course from MolSSI on Udemy covering wavefunction theory methods, basis sets, geometry optimization, and excited states using Psi4, priced at $12.99 with shareable credentials.
• C++ Project Management: CMake, CPack, and Beyond (Udemy Course) Udemy course created by Dr. Taylor Barnes covering C++ project management with CMake, CPack, Debian packaging, debugging tools, and container-native development, priced at $12.99.
• Integral Reference Project Reference data and reference implementations of common integrals found in computational chemistry.

Named customers1 record

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration23 records

AI capability4 records

Feature8 records

Partnerships

Eight partnerships are on record, tiered core and minor.

• Virginia TechcoreStrategic or Co-development PartnerMolSSI is headquartered at 1880 Pratt Drive in Blacksburg, Virginia, affiliated with Virginia Tech. Many MolSSI Software Scientists hold appointments within Virginia Tech's departments.
• Board of Directors (Virginia Tech, Rice University, Stony Brook University, U.C. Berkeley, Rutgers University, U. Southern California, Cal Poly San Luis Obispo, Iowa State University, U. Michigan)coreStrategic or Co-development PartnerMolSSI's Board of Directors comprises leading researchers from universities including Virginia Tech (T. Daniel Crawford), Rice University (Cecilia Clementi), Stony Brook (Robert Harrison), U.C. Berkeley (Teresa Head-Gordon), Rutgers (Shantenu Jha), USC (Anna Krylov), Cal Poly SLO (Ashley Ringer-McDonald), Iowa State (Theresa Windus), and U. Michigan (Dominika Zgid).
• Science & Software Advisory BoardcoreStrategic or Co-development PartnerMolSSI has a dedicated Science & Software Advisory Board providing strategic guidance on software priorities and scientific direction for the computational molecular sciences community.
• Intel CorporationminorStrategic or Co-development PartnerMolSSI partnered with Intel to deliver hands-on virtual workshops on Intel OpenMP GPU Offload (March 7, 2025) and Introduction to Intel Tiber AI Cloud and oneAPI (March 7, 2025). Intel provided access to Tiber AI Cloud, software, hardware, and educational resources as part of the collaboration.
• NSF Center for Computer Assisted Synthesis (C-CAS)minorStrategic or Co-development PartnerMolSSI's Descriptor Libraries project is developed in collaboration with the NSF Center for Computer Assisted Synthesis, creating a full-stack application serving the synthesis planning community.
• Tapia Center at Rice UniversityminorStrategic or Co-development PartnerMolSSI holds an annual computational chemistry workshop in collaboration with the Tapia Center at Rice University, focused on outreach toward women and underrepresented groups in STEM.
• Pfizer Inc.minorStrategic or Co-development PartnerMolSSI Software Scientists Dr. Jessica Nash and Dr. Ashley Ringer-McDonald developed the Python Data and Scripting workshop and delivered it to Pfizer employees in England (December 2019) and subsequently completed additional online workshops for Pfizer.
• Community Code PartnersminorStrategic or Co-development PartnerMolSSI's community code partner program connects MolSSI with external open-source projects including MDTraj, Psi4, OpenMM, NWChem, and others, promoting interoperability and shared best practices.

Scale indicators3 records

Recent moves4 records

Expansion highlights6 records

Direct peers

• NumFOCUS: Nonprofit foundation supporting open-source scientific computing projects (NumPy, SciPy, Jupyter). Same mission structure as MolSSI: steward open-source scientific software infrastructure through community governance, educational programs, and fiscal sponsorship — directly comparable operational model.
• Psi4: Open-source quantum chemistry software package that MolSSI actively supports as a community code partner and integrates with via MDI. Same open-source licensing model, same target user base (computational chemists), same scientific mission — directly comparable open-source scientific software project.
• OpenMM: Open-source molecular dynamics toolkit developed primarily at Stanford, interoperable with MolSSI's MDI and MMIC. Same open-source model, same academic molecular simulation community, same software engineering best-practices focus — directly comparable open-source scientific software.
• LAMMPS: Sandia National Laboratories' open-source molecular dynamics code, integrated with MolSSI's MDI driver/engine interface. Same open-source distribution, same molecular simulation user base, same HPC community — directly comparable open-source scientific software project.
• RDKit: Open-source cheminformatics toolkit integrated via MolSSI's MDI. Same open-source distribution model (GitHub, conda), same computational chemistry community, same modular software architecture — directly comparable open-source scientific software project.
• The Carpentries: Nonprofit community teaching software and data skills to researchers through workshops and instructor training. Highly comparable mission to MolSSI's education pillar (Software Fellowships, Best Practices workshops, OOP curriculum) and same target audience of academic researchers learning software development.
• Open Force Field Initiative: Open-source initiative developing molecular mechanics force fields with community governance and academic consortium backing. Same open-source model, same molecular simulation focus, same academic/community-driven software development — directly comparable open-source scientific software initiative.
• MDAnalysis: Open-source Python library for molecular dynamics trajectory analysis, referenced in MolSSI's software examples. Same open-source model (GitHub, conda), same computational molecular science user base, same NumFOCUS-affiliated governance — directly comparable open-source scientific software project.

Broad incumbents

• Schrödinger, Inc. Public commercial leader in computational chemistry and molecular simulation software for pharma and materials customers. Overlapping capability set (quantum chemistry, MD, force fields) but as a commercial portfolio serving enterprise rather than MolSSI's academic/open-source niche — broad incumbent in the same industry.
• Dassault Systèmes BIOVIA: Commercial enterprise software portfolio for molecular modeling, materials simulation, and lab informatics (including former Accelrys, Pipeline Pilot). Overlapping capability set with MolSSI's QCArchive/BSE/SEAMM but commercial enterprise focus and vastly larger scope — broad incumbent in computational chemistry software.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/molssi_nsf
• GitHubgithub.com/MolSSI
• Facebookfacebook.com/molssi
• LinkedInlinkedin.com/company/molecular-sciences-software-institute

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Funding overview

Funding rounds1 record

Investors

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M&A

Investments

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Frequently asked questions about The Molecular Sciences Software Institute