OneSignal - Customer engagement platform used by over 1 million developers and marketers; the fastest and most reliable way to send mobile and web push notifications, in-app messages, emails, and SMS.
Atomic Email Hunter - Atomic Email Hunter is an incredibly robust tool that specializes in extracting email addresses, along with usernames, from various webpages.
Firebase - Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.
Web Contact Scraper - Web Contact Scraper is a fully automated software application for gathering targeted business contact information. You can search and gather thousands of business details matching a chosen profession within any location worldwide!
Braze - Braze is an engagement platform that empowers growth by helping marketing teams to build customer loyalty through mobile, omni channel customer experiences.
Cute Web Email Extractor - It is fast, secure and trusted web email extractor, email scraper, email grabber, and email spider for extracting email addresses from search engines, websites, local files.