Mixpanel - Mixpanel is the most advanced analytics platform in the world for mobile & web.
Hunter - Find all the email addresses related to a domain
Braze - Braze is an engagement platform that empowers growth by helping marketing teams to build customer loyalty through mobile, omni channel customer experiences.
Icypeas - This email finder has the capacity to bypass catch-alls
Optimizely - A/B testing you'll actually use.
Apollo.io - Apollo’s predictive prospecting, sales engagement, and actionable analytics help the teams to reach its full revenue potential.