CancerModels.Org is a cancer research platform that aggregates clinical, genomic and functional data from various types of patient-derived cancer models (PDCMs)- xenografts, organoids and cell lines. Currently, the portal has over 7000 PDCMs across multiple cancer types, including rare paediatric models and models from minority ethnic backgrounds. The CancerModels.Org standardises, harmonises and integrates clinical metadata, molecular and treatment-based data from academic and commercial providers worldwide. It is the largest open access and free to consumer resource of this kind.