A: Hello Worapin, ClickRank also uses a JS snippet and handles meta tag optimization, but based on their public site, it seems to require more manual setup and user review.
NytroSEO is a fully automated system (and fully configurable)—optimizing large numbers of pages and websites meta tags for keywords and search intent, and automatically adjusting tags in response to SERP drops using AI, with minimal user intervention. As far as we understand, many of these tasks in ClickRank appear to be managed manualy. Hope this was helpful. Thanks