Make the plunge. I recommend AdRoll (though it's my baby, so I must admit I'm biased). As for second opinion, a large number of YC companies also run retargetin

Make the plunge. I recommend AdRoll (though it's my baby, so I must admit I'm biased). As for second opinion, a large number of YC companies also run retargeting through us. We provide great ROI bang for buck and charge transparently on a CPM or CPC. You can setup a campaign in under 5 minutes.