IDG Capital Partners, the local corporate venturing unit of US-based publisher International Data Group, had originally backed CNZZ in late 2008 with more than $10m before its sale to Alibaba.

China-based online retailer Alibaba Group has bought internet traffic statistics company CNZZ.com for a reported $15m.

IDG Capital Partners, the local corporate venturing unit of US-based publisher International Data Group, had originally backed CNZZ in late 2008 with more than $10m.