The compact FiberCell hollow fibre bioreactor cultures cells continuously at high density. It therefore provides ideal culture conditions for producing very impressive amounts of of secreted products: complex, biologically active, multi-subunit recombinant proteins; monoclonal antibodies; extracellular vesicles/exosomes; serum-free secretomes for biomarker discovery. In addition the FiberCell perfused culture system can be used to create long-term physiologically relevant in vitro models. Cells that are attachment-dependent or in suspension can be successfully cultured. Many customer publications are available for review.