Growth · alternatives · 2026

24 alternatives to 500Mail by 500apps

Best Email Client Software

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. 500Mail by 500apps launched in 2022; newer entries below may have overtaken it.

1. 1
   Mailsend by 500apps▲6

   Email marketing software

   2021 · its alternatives →

2. 2
   Polymail▲1,567

   A simple, beautiful, and powerful email client for Mac

   2015 · polymail.io · its alternatives →

3. 3
   Airmail 3▲553

   A simple, beautiful email client for Mac and iOS

   2016 · its alternatives →

4. 4
   Inbox by Google▲1,147

   Next generation inbox

   2014 · google.com · its alternatives →

5. 5
   Zero▲845

   AI native email client

   2025 · 0.email · its alternatives →

6. 6
   Mailbox for Mac (Beta)▲490

   Fly through your email. Now on Mac

   2014 · its alternatives →

7. 7
   Boxy 2▲301

   The best Mac client for Inbox by Gmail

   2017 · its alternatives →

8. 8
   Polymail Pro▲597

   The ultimate email productivity app for business 💌

   2016 · its alternatives →

9. 9
   DevMail▲183

   Email sandbox for software developers

   2024 · its alternatives →

10. 10
    Spark for Android▲296

    The much beloved email client now on Android

    2019 · its alternatives →

11. 11
    Mailmeteor▲567

    Send hundreds of personalized emails with Gmail.

    2019 · its alternatives →

12. 12
    Mailbird▲111

    The best email client ever that syncs and unifies your life.

    2015 · its alternatives →

13. 13MS
    Mail Studio – IDE for designing responsive emails▲395

    2021 · mailstudio.app · its alternatives →

14. 14
    WunderMail for Gmail▲145

    The missing native desktop client for Gmail on Windows 10.

    2018 · its alternatives →

15. 15
    Mailercloud▲257

    Automate, optimize, convert, next level email automation

    2024 · its alternatives →

16. 16KA
    Kanmail – An email client that functions like a kanban board▲271

    2020 · github.com · its alternatives →

17. 17
    MailAdept by mailwarm▲287

    AI Agents & Email deliverability experts on your team

    Jul 2026 · mailadept.com · its alternatives →

18. 18
    Inboxer▲212

    A clean, open-source desktop client for Google Inbox 💌

    2018 · its alternatives →

19. 19
    Mailazy▲203

    Cloud email infrastructure for the internet

    2022 · its alternatives →

20. 20
    Fastmail▲82

    A privacy focused email client

    2019 · its alternatives →

21. 21
    WMail▲115

    OSX App for Google Inbox and Gmail

    2016 · its alternatives →

22. 22
    MailBluster▲30

    Super cost-effective email marketing software

    2020 · its alternatives →

23. 23
    AraMailer▲79

    Powerful email marketing software to get more sales & clicks

    2021 · its alternatives →

24. 24
    Airmail▲93

    Lightning fast mail client for OS X

    2013 · 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 →