Tweeple Search - Find your target audience & powerful influencers on Twitter
Publicfast - The first influencer marketing platform for Periscope
Quuu Promote - Promote your content to influencers w/ curated content
Ribbon.Social - Completely automated Twitter marketing
Onalytica - Onalytica is a powerful software solution that specializes in providing influencer relationship management software and supporting a variety of professional services to help brand scale one-to-one influencer relationship management results.
Twitter Ads - Twitter offers targeted ad placement on their ad platform.