Peptide API Manufacturers

Compare manufacturers and CDMOs with recorded peptide active pharmaceutical ingredient capabilities for drug development, clinical supply, and commercial programs. Showing 75 listed suppliers.

Peptide APIs are pharmaceutical drug substances, not research-grade catalog peptides. Before shortlisting a manufacturer, verify facility-specific GMP status, applicable regulatory filings, process scale, impurity controls, analytical methods, change-control procedures, and batch documentation directly with the supplier.

Directory listing last reviewed July 2026.