In the US we have Compete, Alexa, and SimilarWeb with self-service interfaces, and Comscore, Nielsen, Experian and others with an enterprise focus. We also have Moz, Wordstream, SEMrush, etc. in the SEO/SEM space. What's the lay of the land in China? What are the companies that are analogous to these and the overall state of the digital market data ecosystem over there?
In China there is not much.And most of them did the work of reselling/localizing the US stuff into China,such as Alexa,PR.
But nonetheless,here's a short list:
http://www.aizhan.com it monitors Baidu rankings,index and stuff.
http://www.chinaz.com tools and articles about SEO and SEM.
http://www.cnzz.com website statistics and not so much analytics
http://shu.taobao.com consumption indecies offered by Taobao