bioRxiv (pronounced "bio-archive") is an open access preprint repository for the biological sciences co-founded by and in November 2013. It is hosted by the Cold Spring Harbor Laboratory (CSHL). As preprints, papers hosted on bioRxiv are not peer-reviewed, but undergo basic screening and checked against plagiarism. Readers may offer comments on the preprint. It was inspired by and intends to complement the arXiv repository, which mostly focuses on mathematics, physics and connected disciplines, launched in 1991 by Paul Ginsparg (who also serves on the bioRxiv advisory board). It received support from both the CSHL and the . Additional funding from the Chan Zuckerberg Initiative was confirmed in April 2017.