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After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.
This is true. I've also noticed a significant difference in Moz's DA and Ahrefs' DA. My website Mzcurioso has a DA of 15 on Moz, but only 5 on Ahrefs. I recently came across this article discussing Moz's methodology: https://searchengineland.com/moz-domain-authority-case-against-431732. I'm not sure which of the two platforms provides the true authority of my site."