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About us


PREreview's mission is to bring more equity and transparency to scholarly peer review by supporting and empowering communities of researchers, particularly those at early stages of their career (ECRs) and historically excluded, to review preprints in a process that is rewarding to them.

In 2017, we founded PREreview because we believe science and scholarship should be equitable, transparent, and collaborative.

PREreview gives systematically disadvantaged scientists better ways to find a voice, train, and engage in peer review. Our work is a direct response to the flawed way scientific research is evaluated. Behind closed doors, a handful of unpaid reviewers—selected opaquely and mainly through personal connections—use subjective criteria to decide the fate of a research article. This arcane process is slow and disadvantages researchers from historically excluded groups.

PREreview closes obvious gaps in the process to make research and how it's evaluated more equitable. We train researchers in giving and receiving feedback, we engage communities of marginalized researchers, and we implement measures to reflect on personal bias.

In taking these vital steps, PREreview envisions a future in which every researcher is empowered with the skills to recognize and fight bias, and is welcomed into a peer review culture where constructive feedback is expected and rewarded.

Our values are integral to how and why we do this work. As a part of our commitment to transparency and equity, we share our values below.

Read more about our commitment to Equity, Diversity, and Inclusion here.


We believe in equal access

The fair distribution of advantages and relationships has the potential to change the face of scientific research. By providing pathways to mentorship, collaborative constructive feedback, and publishing of peer reviews, we are dedicated to expanding the reach of science from marginalized communities. We seek to level the playing field of the scientific community by offering resources that are often unavailable to marginalized scientists.

We believe in connecting people

Collaboration is a critical component of the research process. Scholarly conversation and feedback close unseen gaps and generate new ideas. As scientists, we know relationships cultivate dynamic and robust science. Toward that end, we are committed to building bridges between researchers and reviewers and mentors and mentees as a vital part of equity and scientific rigor.

We believe in self-reflection

Bias is a reality of our work and our world. We recognize this fact, and work to alleviate its impact. Scientists who participate in our mentoring and training programs use action-oriented tools to mitigate the bias we all have when we mentor, peer review, and conduct ourselves on an everyday basis. We implement these steps in order to make our work and our field more equitable.

We believe in measurable success

Commitments to equity must be accompanied by data and action. We set our equity goals around key metrics that center user inclusion and diverse demographics. At every level, our programming reflects an evidence-based approach and tangible benchmarks.

What we do

We design and develop open source infrastructure to enable constructive feedback to preprints at a point in time in which it is needed.

We provide opportunities for researchers to create meaningful collaborations and connections defeating cultural and geographical barriers.

We partner with like-minded organizations to organize events, run programs, and work together on open infrastructure to create rewarding preprint review experiences for researchers.

Read more about who we are, how to use our website, our training opportunities, and collaborative live review events.

Keep up-to-date by joining our bi-monthly newsletter and join us on our Community Slack.

Find a preprint to review on servers supported by

We aim to serve preprint authors, reviewers, and servers from around the world. Below, you will find a list of preprint servers that PREreview can easily pull public metadata information from for the purposes of review.

If you are searching for a preprint to review, please visit one of the servers listed below that's relevant to you! We can easily pull public metadata from all of these servers and frequently add more in response to user requests.

You can also visit Sciety to find curated lists of preprints you might like to review, especially through Sciety's groups and lists.

If you use a preprint server that is not listed and you would like to more easily pull public metadata from that server, please let us know at

Request a review of a preprint on servers supported by

You can also request a review of a preprint from, from our Slack community, or directly from bioRxiv or SciELO Preprints.

Once your request is made, it should show up on both (on the homepage and on the "Recent review requests" page) and in our Slack community.

If you have any questions or run into any difficulties, please let us know at