Spark Mail - Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues
lemlist - Send emails that get replies 💌
TL;DR Email - Send short emails & read emails as fast as you read Facebook
Good Sales Emails - Best sales emails from great companies
mlist - Email newsletters, outside of the inbox
Polymail - Native email app for email productivity.