Dev tools · alternatives · 2026

24 alternatives to Trapper Email

Email deliverability testing with SMTP traffic capturing

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Trapper Email launched in 2022; newer entries below may have overtaken it.

1. 1
   Mail Tester▲309

   Test the spamminess of your email

   2016 · mail-tester.com · its alternatives →

2. 2
   Email deliverability validator▲35

   Guarding your pathway to inboxes

   2024 · downnotifier.com · its alternatives →

3. 3
   Email Deliverability Booster▲385

   Reach every lead, every time

   2024 · snov.io · its alternatives →

4. 4
   Mailnest▲100

   Sandbox Email testing tool for IT product, service companies

   2020 · mailnest.io · its alternatives →

5. 5
   Mailook▲309

   Identify & fix your email deliverability issues for free

   2021 · mailook.ai · its alternatives →

6. 6
   MailerCheck 2.0▲145

   All-in-one email deliverability platform for businesses

   2023 · mailercheck.com · its alternatives →

7. 7
   Bulk Email Verifier▲78

   Validates email addresses, checks deliverability

   2022 · outscraper.com · its alternatives →

8. 8
   SMTP Debug Tool▲346

   Test and debug your SMTP connection, quickly and for free

   2023 · smtpdebug.com · its alternatives →

9. 9
   Bouncebuster▲162

   Real-time email verifier

   2021 · bouncebuster.io · its alternatives →

10. 10
    MailSlurp▲103

    End-to-end email testing made easy

    2018 · mailslurp.com · its alternatives →

11. 11
    Email Bounce Checker from BlockSurvey▲98

    Privacy-focused email bounce checker. No ads, no trackers.

    2022 · blocksurvey.io · its alternatives →

12. 12
    Proofy 2.0▲199

    A bulk email verification service

    2019 · proofy.io · its alternatives →

13. 13
    Notification Trapper▲4

    Tool to test email/SMS before you send actual notification

    2020 · notification-trapper.herokuapp.com · its alternatives →

14. 14
    Free Email Verifier▲202

    The first free and accurate email verification service

    2020 · gmass.co · its alternatives →

15. 15
    RiskyVerifier▲28

    Verify Catch all, Unknown and Risky Emails with 98% Accuracy

    2025 · riskyverifier.io · its alternatives →

16. 16
    MailSnag▲83

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

    2018 · mailsnag.com · its alternatives →

17. 17
    Syft▲68

    The most affordable & accurate email checker

    2022 · its alternatives →

18. 18AF
    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 →

19. 19
    SMTP‑Test.com▲103

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

    2025 · smtp-test.com · its alternatives →

20. 20
    Proofy▲181

    Quickly validate and verify your email lists.

    2016 · proofy.io · its alternatives →

21. 21
    Vetter▲134

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

    2020 · vetter.monsoonyeti.com · its alternatives →

22. 22
    BounceBan▲123

    Unlimited free email verify, works great for accept-all

    2022 · bounceban.com · its alternatives →

23. 23
    Mail Tester Tool - By Maileroo▲11

    Test your email deliverability

    2024 · maileroo.com · its alternatives →

24. 24
    MailGuru▲79

    A fast & free, bulk email tester

    2023 · 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 →