Dev tools · alternatives · 2026

24 alternatives to TheChecker's Javascript Email Verification Widget

Plug-and-play real-time email verification widget.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. TheChecker's Javascript Email Verification Widget launched in 2018; newer entries below may have overtaken it.

1. 1
   Real-time email validation JS Widget▲30

   Verify an email address typed in your form in real-time

   2020 · app.thechecker.co · its alternatives →

2. 2
   TheChecker's New Javascript Widget▲3

   Add real-time email verification to any form with no code!

   2018 · emailable.com · its alternatives →

3. 3
   Free Email Verifier▲202

   The first free and accurate email verification service

   2020 · gmass.co · its alternatives →

4. 4
   Frill Embeddable Widgets▲186

   Feedback, roadmap and announcement widgets for your website.

   2022 · frill.co · its alternatives →

5. 5
   Clearout 2.0▲103

   98%+ accurate real-time & bulk email verification services

   2020 · clearout.io · its alternatives →

6. 6
   Proofy▲181

   Quickly validate and verify your email lists.

   2016 · proofy.io · its alternatives →

7. 7
   Email List Verify▲330

   Remove hard bounces and email traps from your email lists

   2016 · emaillistverify.com · its alternatives →

8. 8
   Weecheck v2▲100

   Simple email verification to improve deliverability

   2022 · its alternatives →

9. 9
   Bulk Email Verifier & Checker▲115

   The top tool for checking mail address authenticity

   2023 · email-verifier.convertinsight.com · its alternatives →

10. 10
    Weblegit Email Validation Service▲72

    A real customer starts with a real email

    2017 · weblegit.com · its alternatives →

11. 11
    Email Verify API▲92

    Simple email validation API for a $39 lifetime license

    2021 · cloudlyn.com · its alternatives →

12. 12
    Klik Email▲135

    Turn designs into clickable email signatures instantly

    2025 · its alternatives →

13. 13
    Blaze Verify▲13

    Send emails to real people. Email Verification Platform.

    2019 · emailable.com · its alternatives →

14. 14
    Legitmailbox▲75

    Email Verification API with monthly reports

    2021 · its alternatives →

15. 15
    BounceBan▲123

    Unlimited free email verify, works great for accept-all

    2022 · bounceban.com · its alternatives →

16. 16
    Feedback Rocket▲71

    Collect website visitor feedback with a single line of code

    2023 · feedbackrocket.io · its alternatives →

17. 17
    MailCheck▲49

    Stop Free Trial Abuse with Advanced Email Verification

    2025 · mail-check.tech · its alternatives →

18. 18
    Validate Email – 100% Free & Private▲28

    Instant Email Verification – Real, Reachable & Secure

    2025 · validate.email · its alternatives →

19. 19
    VerifyRight▲5

    Catch fake emails before they signup

    2025 · verifyright.io · its alternatives →

20. 20
    Email Verification Tool 1.0▲79

    An add-on for email verification directly on Google Sheets

    2018 · its alternatives →

21. 21
    See Memo▲75

    Create custom widgets for your website in minutes.

    2020 · its alternatives →

22. 22
    Email Checker - Easy Email Verification▲8

    Email Checker that reduces bounces instantly

    2025 · easyemailverification.com · its alternatives →

23. 23
    Mailerio▲30

    Keep your lists clean with email validation tool

    2025 · mailerio.com · its alternatives →

24. 24
    NLSQL email verification tool▲26

    Free email verification tool feature from NLSQL

    2018 · nlsql.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 →