Scientific studies[25] using its ratings note that ratings from Media Bias/Fact Check show high agreement with an independent fact checking dataset from 2017,[8] with NewsGuard[9] and with BuzzFeed journalists.[10] When MBFC factualness ratings of ‘mostly factual’ or higher were compared to an independent fact checking dataset’s ‘verified’ and ‘suspicious’ news sources, the two datasets showed “almost perfect” inter-rater reliability.[8][20][26] A 2022 study that evaluated sharing of URLs on Twitter and Facebook in March and April 2020 and 2019, to compare the prevalence of misinformation, reports that scores from Media Bias/Fact Check correlate strongly with those from NewsGuard (r = 0.81).[9]

Yandex this one then