The 9 best email apps to manage your inbox in 2026

The past few years have shown that email isn’t going anywhere, no matter how much your workplace uses Slack, Teams, and other remote work tools—and AI isn’t coming to save us. In fact, email apps seem to have gotten better. What were once niche features you had to pay for, like scheduling emails to send later or turning them into reminders in your inbox, are now available in almost every email app, even the default ones and web apps.