UWN | PublishingState
One open-access publisher, MDPI, based in Switzerland and founded in 1996, has published one million articles since its establishment, including 295,186 peer-reviewed articles in 2022 in its 403 journals. As an open-access publisher, MDPI charges a transaction fee of approximately US$2,000 per article. MDPI reports that it relies on 600,000 reviewers and has a rejection rate of 57%. These numbers are impossible to verify.