Dev tools · alternatives · 2026

24 alternatives to Spam Check

A free JSON API to check your email messages' spam scores

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Spam Check launched in 2015; newer entries below may have overtaken it.

1. 1
   Email Validator!▲193

   Free JSON API that gives you a simple way to validate emails

   2015 · garridodiaz.com · its alternatives →

2. 2
   A free tool to easily check your SpamAssasin Score▲12

   Instantly check an email

   2015 · spamcheck.postmarkapp.com · its alternatives →

3. 3
   Email Spam Checker by Autoklose▲105

   Send spam-free, high-converting emails

   2020 · app.autoklose.com · its alternatives →

4. 4
   Spam Checker by Mailmeteor▲88

   Detect and remove spam words in your emails

   2022 · mailmeteor.com · its alternatives →

5. 5
   Unspam AI▲385

   See how your subscribers read your emails with our AI inbox

   2024 · unspam.email · its alternatives →

6. 6
   Unspam.email▲299

   Email spam checker and newsletter heatmap prediction.

   2020 · unspam.email · its alternatives →

7. 7
   Mail Tester▲309

   Test the spamminess of your email

   2016 · mail-tester.com · its alternatives →

8. 8
   Free Spam Detector▲4

   Multi-language Email spam check tool

   2025 · its alternatives →

9. 9
   analyze.email▲136

   Test the spam-y-ness of your emails

   2017 · analyze.email · its alternatives →

10. 10
    You've Got Spam▲305

    A new tool that lets you spam back the spammer

    2020 · youvegotspam.mschfmag.com · its alternatives →

11. 11
    Warmup Inbox▲204

    Free email spam checker & inbox placement tester

    2023 · warmupinbox.com · its alternatives →

12. 12
    Spam Mail Tester▲6

    Free report for improving deliverability of your email

    2015 · mail-tester.com · its alternatives →

13. 13
    Clearbit's Risk API▲189

    Identify spam signups & bad actors

    2017 · app.clearbit.com · its alternatives →

14. 14
    Postmark Spam Check▲3

    A free tool to easily check your SpamAssasin Score

    2015 · spamcheck.postmarkapp.com · its alternatives →

15. 15
    Grade My Email▲145

    Helps you get out of the spam folder.

    2020 · grademyemail.co · its alternatives →

16. 16
    Free Email Finder & Verifier▲69

    Find quality emails from a domain and verify their validity

    2022 · minelead.io · its alternatives →

17. 17
    SellScale Email Grader▲117

    Get instant feedback on your sales emails

    2024 · sellscale.com · its alternatives →

18. 18
    Email Bounce Checker from BlockSurvey▲98

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

    2022 · blocksurvey.io · its alternatives →

19. 19SS
    Simple Spam Scoring▲10

    2011 · spamscore.me · its alternatives →

20. 20
    Vetter▲134

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

    2020 · vetter.monsoonyeti.com · its alternatives →

21. 21
    Retainly Email Content Spam Checker▲5

    Improve your email open rates by 30% or more - for free :-)

    2017 · retainly.co · its alternatives →

22. 22
    Spam-Detecting AI by OpenAI▲73

    Spam detection in the physical world

    2017 · its alternatives →

23. 23
    Helo▲103

    An independent email API from former Postmark folks

    21d ago · helohq.com · its alternatives →

24. 24
    Email Spam Words API▲82

    Free API to list all email spam words in different languages

    2021 · 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 →