The DNA Encoded Compound Library ecosystem spans upstream reagent and hardware suppliers, midstream library‑synthesis platforms and integration services, and downstream users that apply the libraries in target discovery. Upstream participants deliver nucleic‑acid chemistries, solid‑phase supports, and sequencing reagents that enable barcode construction. Midstream actors combine these inputs with automation, microfluidic reactors, and proprietary encoding chemistries to generate high‑diversity libraries, while also providing data‑management software that converts sequencing reads into searchable compound identities. Downstream, pharmaceutical companies, biotech firms, and academic research groups license or purchase libraries to conduct large‑scale phenotypic or target‑based screens, capturing value through hit identification, licensing, and subsequent drug development.