Strand AI is a Y Combinator W26 company developing multimodal foundation models to predict uncollected patient biology. The platform infers missing biological data, spanning genomics, RNA, proteins, and imaging, from a patient's existing information, helping pharmaceutical companies select better clinical trial candidates and accelerate drug launch timelines. It targets pharma and biotech teams working on patient selection and trial design. Strand AI is based in the San Francisco Bay Area and was founded in 2025.