Growth · alternatives · 2026

24 alternatives to MailCatch

A local SMTP server for testing your email implementations

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. MailCatch launched in 2023; newer entries below may have overtaken it.

1. 1AF
   A fake SMTP server for software integration testing▲127

   This is a side project of mine. Use this as your SMTP server in a test environment to guarantee that your users don't receive test emails. Looking for feedback, especially on the security side.

   2024 · fakemail.stream · its alternatives →

2. 2
   SMTP‑Test.com▲103

   One‑click SMTP server test with real‑time protocol logs

   2025 · smtp-test.com · its alternatives →

3. 3
   MailSnag▲83

   Automated email testing for dev/staging/QA/CI environments

   2018 · its alternatives →

4. 4
   Mail Tester▲307

   Test the spamminess of your email

   2016 · its alternatives →

5. 5
   MailSlurp▲103

   End-to-end email testing made easy

   2018 · its alternatives →

6. 6
   Mail-Dev▲5

   Local SMTP Server For Email Testing/Debugging

   2021 · its alternatives →

7. 7
   Send Test Email▲80

   A fast and free, online way to send a test email

   2022 · its alternatives →

8. 8
   Mailcatch.app▲25

   Testing emails has never been easier

   2023 · its alternatives →

9. 9
   SMTP Debug Tool▲346

   Test and debug your SMTP connection, quickly and for free

   2023 · its alternatives →

10. 10
    MailCue▲82

    Run as a fully hardened production email server.

    Apr 2026 · olib-ai.github.io · its alternatives →

11. 11
    Mailsnag▲31

    Seamless Email Testing and Receiving

    2024 · its alternatives →

12. 12
    Debug Mail▲194

    Easy-to-use mail server for developers

    2022 · its alternatives →

13. 13FS
    Fake SMTP server as a service▲149

    2017 · develmail.com · its alternatives →

14. 14
    Mailcheap▲123

    Email hosting, dedicated email servers, API-first platform

    2018 · its alternatives →

15. 15
    Mailnest▲100

    Sandbox Email testing tool for IT product, service companies

    2020 · its alternatives →

16. 16
    PutsMail▲195

    Test your HTML emails before sending them

    2015 · its alternatives →

17. 17
    MailSlurp▲133

    Test, build & automate email and SMS

    2024 · its alternatives →

18. 18
    EmailTest.com▲149

    World's easiest spam testing and email rendering service

    2017 · its alternatives →

19. 19
    Vetter▲134

    Test if your emails will be spammed, using real accounts.

    2020 · its alternatives →

20. 20
    Free SMTP Server Test Tool▲2

    Check & verify email server online.

    2025 · its alternatives →

21. 21
    Mailtrap.io▲125

    Fake SMTP. Send Test Emails without spamming real customers

    2014 · its alternatives →

22. 22
    Lob▲106

    Programmatically send physical mail and verify addresses

    2013 · its alternatives →

23. 23AS
    A simple SMTP proxy that bridges legacy software to modern SMTP servers▲47

    2017 · github.com · its alternatives →

24. 24
    Dimamo▲85

    Email addresses for testing

    2022 · 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 →