Life & fun · alternatives · 2026

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. EmailFlow – Collaborative email review and approval add-in for Outlook launched in 2021; newer entries below may have overtaken it.

1. 1
   EmailFlow▲4

   Collaborative email review and approval add-in for Outlook

   2021 · its alternatives →

2. 2
   Helo▲103

   An independent email API from former Postmark folks

   23d ago · helohq.com · its alternatives →

3. 3
   Flow-e 2.0▲259

   Turn your Gmail & Outlook into Trello-like task lists 💌

   2018 · flow-e.com · its alternatives →

4. 4OS
   Open-source collection of email tips and workflows▲7

   2020 · inboxze.ro · its alternatives →

5. 5
   Mailflow▲267

   Run your business from Gmail

   2020 · getmailflow.com · its alternatives →

6. 6
   Mailcloud▲110

   A New Way to Email

   2014 · mailcloudapp.com · its alternatives →

7. 7
   MailMentor▲162

   A data driven approach to writing better email

   2015 · mailmentor.io · its alternatives →

8. 8
   Seer▲98

   Making emails actionable.

   2014 · getseer.com · its alternatives →

9. 9
   Mailflow▲4

   Create intelligent emails.

   2015 · its alternatives →

10. 10
    Xem▲69

    Open-source email marketing with managed SMTP

    Sep 2026 · xem.email · its alternatives →

11. 11WT
    Webflow to Email Integration▲5

    2020 · blog.palabra.io · its alternatives →

12. 12
    Threadable▲93

    Making group email lists less noisy, more actionable

    2014 · its alternatives →

13. 13
    OpenSource Email Template▲109

    Responsive, Free, and Community Driven

    2014 · dyspatch.io · its alternatives →

14. 14G
    GotEmail▲63

    A fast, native Mac mail app for all your inboxes

    4d ago · gotemail.com · its alternatives →

15. 15FM
    Flute – my attempt at a better email API▲40

    2018 · flutemail.com · its alternatives →

16. 16
    Email Design Podcast #29: Microsoft Partners to Improve Outlook Rendering▲60

    A historic event for email rendering and email standards

    2016 · litmus.com · its alternatives →

17. 17
    Monitor and Implement DMARC▲86

    A free tool to increase your email's deliverability

    2015 · dmarc.postmarkapp.com · its alternatives →

18. 18
    Proofrr▲91

    One workspace for creative feedback, reviews, and approvals

    Aug 2026 · proofrr.com · its alternatives →

19. 19
    FlowControl.io▲57

    easy group discussions about documents through email

    2013 · its alternatives →

20. 20
    Spark Shared Inboxes by Readdle▲104

    Access common Emails and enhance collaboration

    2021 · sparkmailapp.com · its alternatives →

21. 21
    Pingly▲86

    A new messaging platform working to evolve email

    2014 · its alternatives →

22. 22
    Umbra Mail▲76

    A calmer Gmail where emails look like chat threads

    5d ago · umbra.masn.studio · its alternatives →

23. 23PA
    Paceable - An easy way to manage Group Emails▲6

    2013 · slideshare.net · its alternatives →

24. 24
    BirdLeaf▲73

    Turn email addresses into insights.

    2015 · 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 →