Growth · alternatives · 2026

24 alternatives to Zapmail

Slack as an email service

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Zapmail launched in 2023; newer entries below may have overtaken it.

1. 1
   Slack▲2,714

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

   2013 · slack.com · its alternatives →

2. 2
   Zivy▲952

   Automatically prioritize and organize messages in Slack

   2024 · zivy.app · its alternatives →

3. 3
   Slack Shared Channels▲480

   Work with anyone in Slack

   2017 · slack.com · its alternatives →

4. 4
   Polymail Web▲437

   All-in-one email platform for sales communication

   2018 · polymail.io · its alternatives →

5. 5
   UnInbox▲877

   Open source modern email for teams and professionals

   2024 · uninbox.com · its alternatives →

6. 6
   Alert.email▲250

   Get your important emails delivered to a Slack channel

   2016 · its alternatives →

7. 7
   Front 3.0▲400

   Team Inboxes for Email, Twitter, Text & more

   2016 · front.com · its alternatives →

8. 8
   Front 2.0▲500

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

   2014 · front.com · its alternatives →

9. 9
   Slack Enterprise Grid▲292

   Power up every part of your business

   2017 · slack.com · its alternatives →

10. 10
    Polymail 2.0▲170

    Email collaboration for teams.

    2018 · polymail.io · its alternatives →

11. 11
    Zagomail▲73

    Email marketing and automation platform

    2021 · its alternatives →

12. 12
    Polymail Teams▲307

    Email for team outreach and collaboration

    2017 · polymail.io · its alternatives →

13. 13
    PigeonBot▲137

    Send emails via Slack with the /email command

    2017 · its alternatives →

14. 14
    UnInbox: Spaces & Workflows▲251

    Open source collaborative email platform to get shit done

    2024 · uninbox.com · its alternatives →

15. 15
    MailClark▲198

    The Slack bot for external communications

    2016 · its alternatives →

16. 16
    Astro▲308

    AI meets email for Mac, iOS and Android

    2017 · its alternatives →

17. 17
    Slack 4.0▲472

    A snappier, more efficient Slack desktop experience

    2019 · slack.com · its alternatives →

18. 18
    Astrobot for Slack▲180

    Manage your inbox from Slack

    2017 · its alternatives →

19. 19
    Loop Email▲257

    Emailing for teams: Organize your Inbox into channels 💌

    2018 · intheloop.io · its alternatives →

20. 20
    Front▲303

    Efficient email for teams

    2018 · front.com · its alternatives →

21. 21
    Astro 3.0▲264

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

    2018 · its alternatives →

22. 22
    Twist 1.0▲413

    More productive messaging for teams

    2017 · apps.apple.com · its alternatives →

23. 23
    Avochato▲220

    Text message your customers directly from Slack

    2017 · avochato.com · its alternatives →

24. 24
    Helpmonks▲87

    The collaborative email platform for your team

    2015 · helpmonks.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 →