Quantcast Measure - Quantcast Measure provides free cross-platform audience measurement for a mobile app, website, network or platform.

OptinMonster - OptinMonster helps to convert abandoning website visitors into subscribers and customers.

Affinio - Affinio is an advanced marketing intelligence platform that leverages the interest graph to understand today’s consumers.

Sleeknote - Set up lead capture forms on your website in minutes. No coding required. Sync your new email leads with your favorite email service provider. Try for free.

Talkwalker - Talkwalker Consumer Intelligence Platform: built for speed of insight, ease of use, and data democratization

Poptin - Create engaging and high converting website pop ups and contact forms in minutes. With Poptin, you get access to a feature-packed conversion rate optimization toolkit that converts more website visitors into email subscribers, leads, and customers.