Growth · alternatives · 2026

24 alternatives to Astro 3.0

Intelligent inbox and calendar for iOS, Android, Mac & Slack

Astro 3.0 is an intelligent inbox and calendar application designed to streamline email and scheduling across multiple platforms. It serves professionals and teams who need to manage communications and appointments on… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Astro 3.0 launched in 2018; newer entries below may have overtaken it.

1. 1
   Astro▲308

   AI meets email for Mac, iOS and Android

   2017 · its alternatives →

2. 2
   Astrobot for Slack▲180

   Manage your inbox from Slack

   2017 · its alternatives →

3. 3
   Astro▲67

   AI meets email for Mac, iPhone, and Android

   2018 · its alternatives →

4. 4
   Astro for Android▲174

   Modern email app for Mac, iOS, and Android, powered by AI

   2017 · its alternatives →

5. 5
   Astrobot Voice▲85

   Talk to your inbox directly from Astro’s iOS & Android apps

   2017 · its alternatives →

6. 6
   Slack▲2,714

   Be less busy. Real-time messaging, archiving & search.

   2013 · slack.com · its alternatives →

7. 7
   TidyCal 3.0▲935

   The simple calendar and booking solution

   2024 · tidycal.com · its alternatives →

8. 8
   April▲664

   Reach Inbox Zero by speaking with your email & calendar

   2025 · apps.apple.com · its alternatives →

9. 9
   Inbox by Google▲1,147

   Next generation inbox

   2014 · google.com · its alternatives →

10. 10
    SavvyCal for iCloud▲293

    Scheduling links for iCloud, plus Google, Outlook, Fastmail

    2021 · savvycal.com · its alternatives →

11. 11
    Airmail 3▲555

    A simple, beautiful email client for Mac and iOS

    2016 · airmailapp.com · its alternatives →

12. 12
    Front 3.0▲400

    Team Inboxes for Email, Twitter, Text & more

    2016 · front.com · its alternatives →

13. 13
    Slack for Mac▲937

    A new, improved Slack desktop app for Mac

    2016 · slack.com · its alternatives →

14. 14
    Inbox Zero▲821

    Clean Up Your Inbox In Minutes Newsletter management, AI automation, and email analytics. Inbox Zero is the open-source email app that puts you back in control of your inbox.

    2023 · getinboxzero.com · its alternatives →

15. 15
    Sunsama for macOS▲265

    If Trello & Google Calendar had a baby - now for Mac

    2018 · sunsama.com · its alternatives →

16. 16
    Franz▲877

    Franz combines WhatsApp, Slack, Telegram, Gmail, Outlook, and native Signal in one desktop app with AI summaries, workspaces, and privacy-conscious local features.

    2016 · meetfranz.com · its alternatives →

17. 17
    Sunsama▲999

    If Trello & Google Calendar had a baby.

    2018 · sunsama.com · its alternatives →

18. 18
    Astro▲511

    App Store optimization tool for Apple developers

    2023 · tryastro.app · its alternatives →

19. 19
    Loop Email▲257

    Emailing for teams: Organize your Inbox into channels 💌

    2018 · intheloop.io · its alternatives →

20. 20
    Slack 4.0▲472

    A snappier, more efficient Slack desktop experience

    2019 · slack.com · its alternatives →

21. 21
    Front 2.0▲500

    Shared team inboxes to manage Email, Twitter, SMS & more

    2014 · front.com · its alternatives →

22. 22
    Canary Mail▲430

    Discover Canary Mail, the best email client with AI-powered features and integrated calendar. Access multiple accounts, prioritize important emails, and boost productivity effortlessly.

    2016 · canarymail.io · its alternatives →

23. 23
    Boxy Suite▲177

    Beautiful Mac clients for Gmail and Google Calendar.

    2018 · boxysuite.com · its alternatives →

24. 24
    InboxSDK▲508

    First usable API to write Gmail Apps for 1B active users

    2015 · inboxsdk.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →