Dev tools · alternatives · 2026

24 alternatives to Sendwithus+Litmus

Litmus device testing for Sendwithus transactional email

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Sendwithus+Litmus launched in 2016; newer entries below may have overtaken it.

1. 1
   Litmus▲100

   Test and track your emails.

   2014 · litmus.com · its alternatives →

2. 2
   Litmus▲45

   Test and track your emails

   2014 · litmus.com · its alternatives →

3. 3
   Sendwithus▲33

   Transactional Email Made Easy

   2014 · dyspatch.io · its alternatives →

4. 4
   Sendwithus▲174

   Create cutting-edge email experiences at scale 🚀

   2014 · dyspatch.io · its alternatives →

5. 5
   Litmus Extension▲6

   Test HTML emails on your desktop or in your email provider

   2017 · litmus.com · its alternatives →

6. 6
   Email Templating API▲38

   Sendwithus helps teams manage transactional emails outside of source code — leading to streamlined workflows and always on-brand emails. Learn more here!

   2014 · sendwithus.com · its alternatives →

7. 7
   GlockApps▲98

   Test where your email will appear: Inbox or Spam

   2015 · glockapps.com · its alternatives →

8. 8
   Send Check It Subject Line Tester▲206

   Write better email subjects with this tool

   2017 · sendcheckit.com · its alternatives →

9. 9
   PutsMail▲195

   Test your HTML emails before sending them

   2015 · putsmail.com · its alternatives →

10. 10
    mailX by mailwarm▲596

    Email deliverability toolkit for humans and AI agents

    May 2026 · themailx.com · its alternatives →

11. 11
    SendGrid for iOS▲80

    Monitor your email clicks, opens etc. from your iPhone

    2015 · apps.apple.com · its alternatives →

12. 12
    Let.ter▲115

    The tiny email app just for writing emails

    2014 · theletterapp.com · its alternatives →

13. 13
    MailClark▲198

    The Slack bot for external communications

    2016 · its alternatives →

14. 14
    Banana Tag▲73

    See what happens to your emails after you press send

    2014 · its alternatives →

15. 15
    Turing Email▲112

    Making checking your inbox as fun as using Slack

    2015 · goo.gl · its alternatives →

16. 16
    Seer▲98

    Making emails actionable.

    2014 · getseer.com · its alternatives →

17. 17
    Sendbird▲227

    The simplest chat & messaging solution for your app

    2016 · sendbird.com · its alternatives →

18. 18
    Threads.io▲257

    Trigger automated behavior-driven emails (by SendGrid).

    2015 · its alternatives →

19. 19
    Sendicate▲71

    Programmatically manage & segment your email lists

    2014 · yydsniu.it.com · its alternatives →

20. 20
    Rapidology▲83

    Create beautiful email opt-in forms, popups, and widgets

    2015 · its alternatives →

21. 21
    TestSubject▲133

    Test how your email subject line displays on mobile devices.

    2016 · zurb.com · its alternatives →

22. 22
    Postmark for iOS▲89

    Monitor your transactional email from anywhere.

    2018 · apps.apple.com · its alternatives →

23. 23
    Boxer for Android▲75

    "Faster, smarter mobile email app" now on Android

    2014 · play.google.com · its alternatives →

24. 24
    PostX▲59

    Make email useful

    2014 · 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 →