Work · alternatives · 2026

24 alternatives to Rettach

Virtual assistant for organizing email attachments

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Rettach launched in 2017; newer entries below may have overtaken it.

1. 1
   MailMentor▲162

   A data driven approach to writing better email

   2015 · mailmentor.io · its alternatives →

2. 2
   Helo▲103

   An independent email API from former Postmark folks

   16d ago · helohq.com · its alternatives →

3. 3
   Mailcloud▲110

   A New Way to Email

   2014 · mailcloudapp.com · its alternatives →

4. 4FM
   Flute – my attempt at a better email API▲40

   2018 · flutemail.com · its alternatives →

5. 5
   immersion▲88

   Cool tool to get a people-centric view of your email life

   2014 · centerforcollectivelearning.org · its alternatives →

6. 6
   Attachments.io▲59

   Easily Organize Your Email Attachments

   2014 · attachments.io · its alternatives →

7. 7
   MailClark▲198

   The Slack bot for external communications

   2016 · its alternatives →

8. 8
   Seer▲98

   Making emails actionable.

   2014 · getseer.com · its alternatives →

9. 9
   Threadable▲93

   Making group email lists less noisy, more actionable

   2014 · its alternatives →

10. 10
    OpenSource Email Template▲109

    Responsive, Free, and Community Driven

    2014 · dyspatch.io · its alternatives →

11. 11
    Redkix▲23

    Slack meets email

    2016 · its alternatives →

12. 12
    Iterable▲94

    Smarter email marketing

    2014 · iterable.com · its alternatives →

13. 13
    Planleaf▲97

    Task management with email

    2014 · planleaf.com · its alternatives →

14. 14
    Monitor and Implement DMARC▲86

    A free tool to increase your email's deliverability

    2015 · dmarc.postmarkapp.com · its alternatives →

15. 15
    MailPile▲75

    A fast, responsive open source email client

    2014 · mailpile.is · its alternatives →

16. 16
    Switchboard▲99

    Open-source email processing built in Erlang

    2014 · its alternatives →

17. 17
    Pingly▲86

    A new messaging platform working to evolve email

    2014 · its alternatives →

18. 18OS
    Open-source collection of email tips and workflows▲7

    2020 · inboxze.ro · its alternatives →

19. 19
    Emmerge▲7

    Integration of email, tasks, and slack

    2016 · its alternatives →

20. 20
    Boxer▲73

    The first open platform for mobile email

    2014 · omnissa.com · its alternatives →

21. 21PO
    ParseMail.org – A tool for email admins▲8

    2015 · parsemail.org · its alternatives →

22. 22
    Plino▲68

    An Intelligent spam filtering system

    2016 · plino.herokuapp.com · its alternatives →

23. 23
    Ivelope▲7

    making email better

    2018 · ivelope.com · its alternatives →

24. 24PA
    Paceable - An easy way to manage Group Emails▲6

    2013 · slideshare.net · 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 →