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Best Email Verification APIs in 2026

  1. 1

    Abstract Email Validation API

    Free plan APIWeb

    Abstract Email Validation API combines address, domain and mailbox checks with real-time and bulk workflows. Review the free request limit and annual billing for paid plans against expected usage.

    7.4 Free plan · paid from $17/mo (annual) Visit site
  2. 2

    BillionVerify

    Free plan APIWeb
    7.4 Free plan · paid from $20 Visit site
  3. 3

    Clearout Email Verification

    Free plan APIExtensionWeb

    Clearout provides several ways to check email addresses, from a single entry to bulk lists and API workflows.

    7.4 Free plan · paid from $16/mo (annual) Visit site
  4. 4

    Bouncer

    Free plan APIWeb

    Choose Bouncer if you need list verification, signup checks, or API-based email validation, with free initial credits and credits that do not expire.

    7.3 Free plan · paid from $8 Visit site
  5. 5

    Byteplant Email Validator

    Free plan APIWeb

    Byteplant Email Validator combines detailed mailbox checks with API, bulk, plugin, and workflow options.

    7.3 Visit site
  6. 6

    Cloudmersive Email Verification API

    Free plan APISelf-hosted
    7.2 Free plan · paid from $19.99/mo Visit site
  7. 7

    DeBounce

    Free plan APIWeb
    7.2 From €10 Visit site
  8. 8

    EmailListVerify

    Free plan APIExtensionWeb

    EmailListVerify offers bulk and real-time email checks, with API and extension options alongside integrations.

    7.2 From $5 · 10-day trial Visit site
  9. 9

    Emailable

    Free plan APIWeb

    Emailable supports list processing, real-time form checks, and developer access, with additional deliverability monitoring.

    7.1 From $38 Visit site
  10. 10

    Email List Validation

    Free plan APIWeb
    7.1 From $19 Visit site
  11. 11

    Email Validator

    Free plan APIWeb
    7.0 Free plan Visit site
  12. 12

    EmailValidator

    Free plan APIWeb
    7.0 Free plan · paid from $3 Visit site
  13. 13

    emailverifier.dev

    Free plan APIWeb

    emailverifier.dev offers single, domain and bulk checks through web and API tools. Consider credit use and temporary bulk-data storage when choosing how to process addresses.

    7.0 Free plan · paid from $10 Visit site
  14. 14

    MyEmailVerifier

    Free plan APIExtensionWeb

    MyEmailVerifier combines bulk list checks with real-time API verification and offers a free daily-credit plan.

    7.0 Free plan Visit site
  15. 15

    InboxTrue

    Free plan APIWeb
    6.9 Free plan · paid from $50 Visit site
  16. 16

    Mailbeam

    Free plan APIWeb

    Mailbeam provides address checks through an HTTP API, with bulk processing and a free monthly quota. Consider the non-rolling limits and plan overage terms when choosing an allowance.

    6.9 Free plan · paid from €19/mo · 14-day trial Visit site
  17. 17

    MailboxValidator

    Free plan APIWeb

    MailboxValidator offers both API and bulk-list checking, with a wide set of validation checks and integrations.

    6.9 30-day trial Visit site
  18. 18

    MailerCheck

    Free plan APIWeb
    6.9 From $0.01 Visit site
  19. 19

    Reacher

    Free plan APISelf-hostedWeb

    Reacher provides flexible verification through an API, dashboard, or self-hosted deployment.

    6.9 Free plan · paid from €69/mo Visit site
  20. 20

    ZeroBounce

    Free plan AndroidAPIExtension+2

    ZeroBounce combines list validation with deliverability monitoring and related email tools.

    6.9 Free plan · paid from $39 Visit site
  21. 21

    MillionVerifier

    Free plan APIWeb

    MillionVerifier combines list, API, and connected-account checks with disposable detection and catch-all verification.

    6.8 Free plan · paid from $39 Visit site
  22. 22

    Proofy

    Free plan APIWeb

    Proofy combines one-off checks, bulk verification, API workflows, and form integrations.

    6.8 From $5 Visit site
  23. 23

    QuickEmailVerification

    Free plan APIWeb

    QuickEmailVerification offers list processing, real-time checks, and batch API workflows. The free tier resets daily, while its 500-credit Pay As You Go option is a one-time 4.00 USD purchase.

    6.8 Free plan · paid from $4 Visit site
  24. 24

    Reoon Email Verifier

    Free plan APIWeb

    Reoon combines address checks, bulk list cleanup, and live validation through its API and WordPress plugin. The free tier has daily and instant-credit limits, while paid plans start at $9/mo.

    6.7 Free plan · paid from $9/mo Visit site
  25. 25

    Trueguard Email Verification API

    Free plan APIWeb
    6.7 Free plan · paid from $49.99/mo Visit site

#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price

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