rdkit/rdkit

Health v2 · maintenance only

Adoption not part of the score

3565 stars · 1045 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

RDKit is an open-source cheminformatics toolkit written in C++ with Python, Java, C#, and JavaScript wrappers. It provides core data structures and algorithms for 2D/3D molecular operations, descriptor and fingerprint generation, and a PostgreSQL cartridge for substructure and similarity searches.

Use cases

• parse and manipulate molecular structures from SMILES strings
• generate molecular fingerprints for machine learning models
• search a chemical database for substructure matches
• calculate molecular descriptors for QSAR modeling
• draw 2D depictions of molecules
• perform 3D conformer generation and molecular similarity comparisons

When to choose

• you need a mature, business-friendly (BSD) cheminformatics toolkit
• you work in Python, Java, C#, or C++ and need molecular modeling capabilities
• you want cheminformatics search integrated into PostgreSQL
• you need descriptors and fingerprints for ML in drug discovery

When to avoid

• you need a GUI-first molecular editor rather than a programming library
• your chemistry needs are limited to simple periodic-table lookups
• you require closed-source licensing terms

Facets

library · maturity stable

machine-learning search-engine data-science sdk chemistry bioinformatics machine-learning data-science python cpp cross-platform jvm dotnet browser cheminformatics molecular-descriptors molecular-fingerprints smiles postgresql-cartridge drug-discovery

Member repositories

For agents

markdown · JSON · MCP: product_card(name="rdkit/rdkit")