This friend, hello, according to my understanding, at present the domestic self-proclaimed big data company is still a lot of mainstream on the BAT three leading enterprises, the source of data from the majority of the user community, but the data are basically not external. Data for various industries, there are also many companies. For example, enterprise industrial and commercial data of enterprise checking, microblogging and microblogging data of Qingbo, Internet information information of Haina, do personal capture business locomotive and octopus and so on. There is also a category of companies is to cover a variety of data forms in the Internet, that is, what forums, blogs, posting, news, microblogging, microblogging, e-commerce and so on data have the company, a more famous one is called the massive information, a lot of big data forums can be seen in the report quoted in their data. The above is my engaged in the big data industry for two years to understand some of the content, typing is very hard, please adopt