Dev tools · alternatives · 2026

24 alternatives to Helo

An independent email API from former Postmark folks

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1. 1FM
   Flute – my attempt at a better email API▲40

   2018 · flutemail.com · its alternatives →

2. 2
   MailMentor▲162

   A data driven approach to writing better email

   2015 · mailmentor.io · its alternatives →

3. 3PO
   ParseMail.org – A tool for email admins▲8

   2015 · parsemail.org · its alternatives →

4. 4
   Mailcloud▲110

   A New Way to Email

   2014 · mailcloudapp.com · its alternatives →

5. 5
   Xem▲69

   Open-source email marketing with managed SMTP

   24d ago · xem.email · its alternatives →

6. 6
   OpenSource Email Template▲109

   Responsive, Free, and Community Driven

   2014 · dyspatch.io · its alternatives →

7. 7
   Seer▲98

   Making emails actionable.

   2014 · getseer.com · its alternatives →

8. 8
   Switchboard▲99

   Open-source email processing built in Erlang

   2014 · its alternatives →

9. 9OS
   Open-source collection of email tips and workflows▲7

   2020 · inboxze.ro · its alternatives →

10. 10
    Pingly▲86

    A new messaging platform working to evolve email

    2014 · its alternatives →

11. 11
    bipio▲76

    A Personal API for Email and Web Apps

    2014 · bip.io · its alternatives →

12. 12
    Plino▲68

    An Intelligent spam filtering system

    2016 · plino.herokuapp.com · its alternatives →

13. 13AA
    An automatic email endpoint for any domain▲7

    2014 · questo.email · its alternatives →

14. 14PA
    Paceable - An easy way to manage Group Emails▲6

    2013 · slideshare.net · its alternatives →

15. 15PE
    Public email API for your apps, sites, contact forms▲6

    2015 · mailthis.to · its alternatives →

16. 16CE
    Capture emails with 5 lines of code▲8

    Capturing emails always sucked. I don't want to add a full-blown newsletter API. That's why I've created my own tool. Would love your feedback on this

    2024 · mailee.dev · its alternatives →

17. 17
    Rettach▲7

    Virtual assistant for organizing email attachments

    2017 · forsale.godaddy.com · its alternatives →

18. 18
    Postmark▲8

    Email delivery for web apps – done right.

    2014 · postmarkapp.com · its alternatives →

19. 19
    Ivelope▲7

    making email better

    2018 · ivelope.com · its alternatives →

20. 20
    Free Email Tracker for Gmail▲7

    2017 · chrome.google.com · its alternatives →

21. 21EE
    Email Extractor for Newsletter Marketing – Google Inbox▲8

    2018 · emailextractor.online · its alternatives →

22. 22
    Bulletyn – custom email digests of Reddit, HN, and RSS▲5

    2022 · bulletyn.co · its alternatives →

23. 23
    Aboardly – IFTTT for automated customer emailing▲9

    2015 · aboardly.com · its alternatives →

24. 24IM
    I made a tool that helps you create email signatures and share to team▲7

    2021 · mailswype.io · 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 →