Dev tools · alternatives · 2026

24 alternatives to mailboxlayer

Email Validation & Verification JSON API for Developers

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. mailboxlayer launched in 2021; newer entries below may have overtaken it.

1. 1
   Email Verify API▲92

   Simple email validation API for a $39 lifetime license

   2021 · its alternatives →

2. 2
   Email Validator!▲193

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

   2015 · its alternatives →

3. 3
   Free Email Verifier▲202

   The first free and accurate email verification service

   2020 · its alternatives →

4. 4
   Legitmailbox▲75

   Email Verification API with monthly reports

   2021 · its alternatives →

5. 5
   Spam Check▲93

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

   2015 · its alternatives →

6. 6
   Proofy▲181

   Quickly validate and verify your email lists.

   2016 · its alternatives →

7. 7
   MailCheck▲49

   Stop Free Trial Abuse with Advanced Email Verification

   2025 · its alternatives →

8. 8
   Email Validator API ▲7

   It tells you if a Email is valid or not

   Oct 2025 · thirsty-melisse-hardcode-c2fce731.koyeb.app · its alternatives →

9. 9
   MailerCheck 2.0▲145

   All-in-one email deliverability platform for businesses

   2023 · its alternatives →

10. 10
    APIddress — email validation API▲17

    The email validation API that shows its work

    Jun 2026 · apiddress.com · its alternatives →

11. 11
    Self host Email Validation▲51

    Cleanmails - Unlimited email verification

    Jan 2026 · its alternatives →

12. 12
    Mailcheap▲123

    Email hosting, dedicated email servers, API-first platform

    2018 · its alternatives →

13. 13MS
    Maildown – Super Simple Email API▲98

    2019 · github.com · its alternatives →

14. 14
    Validator.pizza▲99

    Free API to block 🗑 disposable emails

    2017 · its alternatives →

15. 15
    Bulk Email Verifier▲78

    Validates email addresses, checks deliverability

    2022 · its alternatives →

16. 16
    Email Verification API▲4

    Real-time and convenient email validation tool

    2021 · its alternatives →

17. 17
    emailstuff.io▲14

    Reliable email validation for clean lists and deliverability

    2025 · its alternatives →

18. 18EA
    EmailDetective – A Email Validation API▲6

    Hello, I'm Andrew, owner of EmailDetective. I was looking for an API solution for email validation/scoring for multiple mailing lists. I noticed a lot of the email validation services out there: - Do not have an API - Are behind a paywall to try the API - Are priced way to high - Have inconsistent or non-intuitive APIs So I decided to create my own solution. This is my first time announcing EmailDetective, so I am looking for any general feedback, issues you might have run into and if you find this service useful. And yes you can try it out for free without signing up :)

    2024 · emaildetective.io · its alternatives →

19. 19
    Mailerio▲30

    Keep your lists clean with email validation tool

    2025 · mailerio.com · its alternatives →

20. 20
    Totus Email Validation API▲5

    Stop Bounced Emails Killing You Business, Get Real Users

    2025 · gototus.com · its alternatives →

21. 21
    Email Verifier API▲5

    Verify Emails. Eliminate Hard Bounces. Boost Deliverability

    2025 · rapidapi.com · its alternatives →

22. 22
    SmartEmailCheck▲9

    Smarter Email Validation—Built for Modern Apps.

    Nov 2025 · smartemailcheck.com · its alternatives →

23. 23
    VerifyRight▲5

    Catch fake emails before they signup

    2025 · verifyright.io · its alternatives →

24. 24
    Truelist▲53

    Unlimited email validation

    2024 · 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 →