Open access publisher PeerJ has been awarded the Directory of Open Access Journals (DOAJ) Seal. The DOAJ only awards the seal to 'journals that adhere to an exceptionally high level of publishing standards and best practice.'
To be awarded the DOAJ Seal journals must fulfil a set of criteria related to accessibility, openness, discoverability, reuse and author rights.
Among other reasons, PeerJ has been awarded the DOAJ Seal because PeerJ has an archival and preservation arrangement in place with CLOCKSS, LOCKSS and Portico; provides permanent DOI identifiers in the published content; provides article level metadata to DOAJ; embeds machine-readable CC licensing information in article level metadata; allows allow reuse and remixing of content in accordance with a CC BY 4.0 license; has a deposit policy registered in SHERPA/RoMEO; and allows the author to hold the copyright without restriction.
