There are many options. bioRxiv has been steadily growing in preprints posted per month since 2014, and the more recently-launched Research Square (populated by the In Review service used by Springer Nature) has been rapidly expanding. medRixv is a sister to bioRxiv hosting clinically-relevant preprints. Each server varies in its disciplinary scope, screening and withdrawal policies, and technological features. To learn more, visit the Preprint Server Directory.