Growth · alternatives · 2026

24 alternatives to MailGuru

A fast & free, bulk email tester

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. MailGuru launched in 2023; 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 List Verify▲330

   Remove hard bounces and email traps from your email lists

   2016 · emaillistverify.com · its alternatives →

3. 3
   MailTester.AI▲327

   Forward an email and get an AI deliverability report in 30s

   2025 · mailtester.ai · its alternatives →

4. 4
   MailSlurp▲103

   End-to-end email testing made easy

   2018 · mailslurp.com · its alternatives →

5. 5
   Emailgurus - Open Source▲111

   Keep your Gmail inbox focused on people you know

   2022 · keepknown.com · its alternatives →

6. 6
   mailfloss▲175

   Remove fake and bounced emails without code or spreadsheets

   2019 · mailfloss.com · its alternatives →

7. 7
   Email Bounce Checker from BlockSurvey▲98

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

   2022 · blocksurvey.io · its alternatives →

8. 8
   Mailcastr▲363

   Create email signature that can track your emails

   2017 · bulletbusiness.com · its alternatives →

9. 9
   Mail Tester Tool - By Maileroo▲11

   Test your email deliverability

   2024 · maileroo.com · its alternatives →

10. 10
    EmailTest.com▲149

    World's easiest spam testing and email rendering service

    2017 · its alternatives →

11. 11
    Email Testing By Inbox Pirates▲355

    Preview, analyze & test emails with one click

    2022 · inboxpirates.com · its alternatives →

12. 12
    Proofy▲181

    Quickly validate and verify your email lists.

    2016 · proofy.io · its alternatives →

13. 13
    Free Email Verifier▲202

    The first free and accurate email verification service

    2020 · gmass.co · its alternatives →

14. 14
    Warmup Inbox▲204

    Free email spam checker & inbox placement tester

    2023 · warmupinbox.com · its alternatives →

15. 15
    Mailnest▲100

    Sandbox Email testing tool for IT product, service companies

    2020 · mailnest.io · its alternatives →

16. 16
    SonarList.io▲90

    Unlimited professional email finder and validator

    2023 · its alternatives →

17. 17
    MailerCheck 2.0▲145

    All-in-one email deliverability platform for businesses

    2023 · mailercheck.com · its alternatives →

18. 18
    SMTP‑Test.com▲103

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

    2025 · smtp-test.com · its alternatives →

19. 19
    Bulk Email Verifier▲78

    Validates email addresses, checks deliverability

    2022 · outscraper.com · its alternatives →

20. 20
    analyze.email▲136

    Test the spam-y-ness of your emails

    2017 · analyze.email · its alternatives →

21. 21
    Bouncebuster▲162

    Real-time email verifier

    2021 · bouncebuster.io · its alternatives →

22. 22
    MailCue▲82

    Run as a fully hardened production email server.

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

23. 23
    Mailerio▲30

    Keep your lists clean with email validation tool

    2025 · mailerio.com · its alternatives →

24. 24
    Email Verifier▲50

    Verify your email list before you hit send

    Aug 2026 · mailercloud.com · 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 →