Hiver - Manage Customer Support, Sales and Projects right from your Gmail inbox. Collaborate with Shared Labels, Shared Contacts, email notes, email reminders and email templates

EmailGreen - EmailGreen is a web-based email marketing and comprehensive CRM solution that is created to help organizations and companies manage their contacts and execute all the valuable campaigns as well as optimize social media channels among other so they c…

Clean Email - Clean Email is an online service that empowers you to take control of your mailbox.

GMass - GMass allows you to easily schedule emails, send out mass emails and mail merge campaigns and more with Gmail! Click here to learn about more features!

Nylas Mail - The Nylas Cloud API powers your application with email, calendar & contacts features. Built-in features for better email, calendar, and contact management.

Intelliverse Email Tracker - Intelliverse Email Tracker provides insights to increase the ​productivity of your emails.