PeerJ is an open access peer-reviewed scientific mega journal covering research in the biological and medical sciences.

Submitted research is judged solely on scientific and methodological soundness (as at PLoS ONE), with a facility for peer reviews to be published alongside each paper.

[15] Originally, PeerJ charged a one-time membership fee to authors that allowed them—with some additional requirements, such as commenting upon, or reviewing, at least one paper per year—to publish in the journal for life.

[16] Since October 2016, PeerJ has reverted to article processing charges, but still offers the lifetime membership subscription as an alternative option.

[22] In April 2013 The Chronicle of Higher Education selected PeerJ CEO and co-founder Jason Hoyt as one of "Ten Top Tech Innovators" for the year.