Mattermark (YC S12) raises a $6.5M Series A to keep VCs in the knowhttp://pando.com/2014/12/16/got-startup-data-mattermark-raises-a-6-5m-series-a-to-keep-vcs-in-the-know/ by dmor • 12 years ago 46 22 12 years agoPApando.com