StackAdapt - Native advertising demand side platform.

Nudgify - Nudgify is a Social Proof App that includes FOMO, Urgency and Review Nudges. Adding Social Proof notifications to your site helps you build trust and increase conversions on Shopify, Wordpress or any other platform.

Nativo - Nativo is an advertising technology platform for brand advertisers and publishers to scale, automate, and measure native ads

NotificationX - Best social proof and FOMO marketing solution for WordPress to increase conversion rates.

Zemanta - Zemanta is an online content and links suggesting platform that provides a plugin to the bloggers, publishers and other types of content creators.

Proof - Website conversion rate optimization and visitor monitoring