ReadNotify - ReadNotify enables the user to know when email is sent and the reciever reads the email.
Mailshake - Mailshake lets you build your professional network through a smart and intuitive approach to cold emailing.
GetNotify - GetNotify is a free email tracking software solution.
Snov.io - More leads. More sales. More revenue.
Intelliverse Email Tracker - Intelliverse Email Tracker provides insights to increase the productivity of your emails.
Instantly - Build your own infinitely scalable cold email outreach system with Instantly.