Alternatives

Products that do what InboxCore does

Professional email infrastructure for teams that move fast.

1. 1
   Inbox Zero▲821

   Clean up your inbox in minutes, open source

   2023 · getinboxzero.com

2. 2
   Folderly▲747

   Get revenue from every email campaign - 99.9% inbox rate

   2023 · folderly.com

3. 3
   Inbox by Google▲1,148

   Next generation inbox

   2014 · google.com

4. 4
   Front for iOS▲406

   The first inbox for teams

   2016

5. 5
   Folderly▲118

   Get revenue from every email campaign with 99.9% inbox rate

   Mar 2026 · folderly.com

6. 6
   Inbox Grader by Freshworks▲143

   Free metrics 📈 for your business and team email ✉️

   2018

7. 7
   Superinbox▲531

   Email vibing in your Gmail / Outlook

   Oct 2025

8. 8
   InboxSDK▲508

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

   2015

9. 9
   InboxPro▲174

   Boost your productivity & turn Gmail into a powerful machine

   2022

10. 10
    UnInbox: Spaces & Workflows▲251

    Open source collaborative email platform to get shit done

    2024

11. 11
    Mailazy▲203

    Cloud email infrastructure for the internet

    2022

12. 12
    Polymail Pro▲597

    The ultimate email productivity app for business 💌

    2016

13. 13
    Superflows▲476

    AI assistant for email - get to inbox zero faster

    2023

14. 14
    Front (iOS)▲382

    The easiest way to work with team inboxes (on your iPhone!)

    2015

15. 15
    Stable▲525

    Get a virtual address & mailbox for your business

    2024

16. 16
    MailAdept by mailwarm▲287

    AI Agents & Email deliverability experts on your team

    Jul 2026 · mailadept.com

17. 17
    Polymail 2.0▲170

    Email collaboration for teams.

    2018

18. 18JA
    Jelly – A simpler shared inbox for small teams▲338

    Hello HN! I wanted to share something we at Good Enough (https://goodenough.us) built over the past year: Jelly! https://letsjelly.com Jelly is a simpler shared inbox for small teams (like us) to answer team email. We had just been sharing a login to Fastmail previously, but as email started getting busier, that really started to stink as a solution — no one knew who was going to answer what, if someone else saw an email or not, etc etc. And a Google Group would prove to be worse, as replies too easily got lost to personal inboxes if someone accidentally didn’t “Reply…

    2024 · letsjelly.com

19. 19
    MailerCheck 2.0▲145

    All-in-one email deliverability platform for businesses

    2023

20. 20
    DeliverCore: Email Deliverability Suite▲1

    Complete Email Deliverability Platform

    2025

21. 21
    Sidemail 2.0▲307

    All-in-one email platform for SaaS

    Nov 2025

22. 22
    inbound ▲227

    An email platform for builders

    2025

23. 23
    Loop Email▲257

    Emailing for teams: Organize your Inbox into channels 💌

    2018

24. 24
    10xBeast▲270

    Customized email campaigns for outbound B2B sales teams

    2024

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