CLS is an independent cell repository founded in 1998 which specializes in the cultivation and preservation of cell lines. With more than 800 continuous cell lines from various tumors, tissues and species, CLS is one of the largest privately held cell banks in the world.

We are directing our efforts towards a serum-free cell culture society. Already having grown more than 30 cell lines free of any serum additives, CLS is pursuing to adapt more than 100 cell lines to serum-free conditions by 2025 without altering their genetic markup, expression profile or growth characteristics. We do not only want to fight the reproducibility crisis but to preserve the future of science.