I've been on a quest for the perfect GMail email app/client... I think I might've found it with UMuse. You can tell designers built it.

Turn your Gmail or Office 365 inbox into a visual task board with Flow-e. Delegate tasks, manage to-dos, schedule meetings, and set deadlines from your inbox.

Effortlessly assign, track and follow up on customer emails. Organized boards, team mailboxes, tasks & workflows. Use cases: Sales, Customer Service, Finance and Projects. All without ever leaving your Gmail Inbox!

Polymail is the email platform for teams. By combining email with real time collaboration and integrating it with your team's other tools, Polymail allows everyone to work together seamlessly, move faster, and be more productive.

Mailbutler is an email extension for Apple Mail, Microsoft Outlook, and Gmail, designed to help professionals and teams manage their emails better and improve their customer relationships. It integrates seamlessly into your inbox and offers advanced inbox features like advanced email tracking details, an advanced email scheduling feature, customizable email signatures, the ability to turn your emails into actionable to-dos, and many more. Mailbutler - it’s still your inbox, but smarter.

A feature-rich email app that extends Gmail's functionality and delivers enhanced productivity for customer-facing teams

Canary learns how you email. It can write your emails, surface what needs attention, silence spam, and much more. Say hello to your AI Email Copilot.

Our mission is to make people more productive by enabling technology to millions. We strive to create the best experiences on mobile and desktop for those who want to be more productive.