BlueMail is a multiplatform email and calendar app that can handle multiple accounts from different email services like IMAP, Exchange and POP3. It's got a Generative Email AI (GemAI) powered by ChatGPT for summarizing and drafting emails, and it can group messages by sender for inbox decluttering. It's available for Windows, Mac, Linux, Android and iOS, and offers free and premium versions.
Another option is Spark, which uses AI and other technology to help you prioritize and organize your messages. It can handle multiple email services, including IMAP, iCloud, Exchange, Outlook and Yahoo. Spark's smart inbox and home screen can separate messages you need to see, and it's got sender grouping, done markers and reminders to help you manage your time. It also has an AI email writing assistant for drafting, replying and editing messages.
Breezemail is an AI-powered email organizer that uses smart categories to keep important messages organized. It's an Outlook and Gmail extension, and you can create custom categories based on ChatGPT queries. The service is designed to help you reach "inbox zero" with a minimum of effort, keeping your inbox organized and secure.