Astro by Slack is described as 'Modern email and calendar apps for Mac, iOS, Android, Slack and Alexa, powered by Artificial Intelligence. Astro keeps you focused on what's most important' and is a Email Client in the office & productivity category. There are more than 25 alternatives to Astro by Slack for a variety of platforms, including Windows, Mac, Android, iPhone and iPad apps. The best Astro by Slack alternative is Thunderbird, which is both free and Open Source. Other great apps like Astro by Slack are K-9 Mail, Microsoft Outlook, FairEmail and Spark Mail.
Transform your email inbox into a collaborative workspace with Spike. Enjoy integrated chat-like emails, tasks, collaborative notes, and group projects. Seamlessly manage multiple accounts, organize priorities, and schedule meetings across devices.
Shift consolidates web applications into one platform, simplifying access to Google and Microsoft accounts. It declutters tabs, supports email management for Gmail and Outlook 365, integrates with extensions like Grammarly, LastPass, and more, while providing custom notifications and quiet hours.
Engineered for iOS, macOS, and watchOS, this fast mail client supports multiple account types, custom actions, Smart Inbox filtering, unified inbox, privacy mode, email scheduling, snooze, third-party app integration, flexible personalization, and advanced workflow tools.
TypeApp is an all-free, beautifully designed, universal email app, capable of managing unlimited number of mail accounts from various providers, allowing for smart push notifications while enabling personalization across multiple email accounts.
Productivity browser featuring unified webmail, website, and web app management, isolated multi-account support, vertical sidebar with grouping, memory-saving tab sleeping, app-to-app linking, built-in chat and screenshare, collaboration workspaces, and strong security.
The Bat! is a secure email client software, built to protect your correspondence against third-parties.
Mac IMAP email client featuring keyboard control, Markdown email composition, advanced search capabilities, smart mailboxes, automatic signature handling, cryptographic options with OpenPGP/S-MIME, tagging, multiple notifications, and customizable layouts including widescreen.
myMail is the smart email app for managing all your accounts on iOS and Android.
Unibox is a people centric email client that organizes your messages by person. It avoids having email like a to-do list.
Columba is an email client written in Java, featuring a user-friendly graphical interface with wizards and internalionalization support. Its a powerful mail management tool with features to enhance your productivity and communication.
AquaMail is an email app for Internet and Exchange mail, for Android 4.0.3 and higher.
The most powerful platform for email productivity in a beautiful native app — on desktop and mobile.
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It's the world's first conversational email. Truly reinventing the email like it was created today. Lots of features to increase your productivity and help you get more things done.