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Best Email Verification APIs in 2026
Email verification APIs check email addresses before you send messages. This category compares real-time API and batch verification options, plus disposable, role-account, catch-all, and SMTP mailbox checks.
- 31 apps
- Research read 23 Sept 2026
- How the order is worked out
- 1
Abstract Email Validation API
Free plan APIWebAbstract 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.
- 2
BillionVerify
Free plan APIWeb - 3
Clearout Email Verification
Free plan APIExtensionWebClearout provides several ways to check email addresses, from a single entry to bulk lists and API workflows.
- 4
Bouncer
Free plan APIWebChoose Bouncer if you need list verification, signup checks, or API-based email validation, with free initial credits and credits that do not expire.
- 5
Byteplant Email Validator
Free plan APIWebByteplant Email Validator combines detailed mailbox checks with API, bulk, plugin, and workflow options.
7.3 Visit site - 6
Cloudmersive Email Verification API
Free plan APISelf-hosted - 7
DeBounce
Free plan APIWeb - 8
EmailListVerify
Free plan APIExtensionWebEmailListVerify offers bulk and real-time email checks, with API and extension options alongside integrations.
- 9
Emailable
Free plan APIWebEmailable supports list processing, real-time form checks, and developer access, with additional deliverability monitoring.
- 10
Email List Validation
Free plan APIWeb - 11
Email Validator
Free plan APIWeb - 12
EmailValidator
Free plan APIWeb - 13
emailverifier.dev
Free plan APIWebemailverifier.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.
- 14
MyEmailVerifier
Free plan APIExtensionWebMyEmailVerifier combines bulk list checks with real-time API verification and offers a free daily-credit plan.
- 15
InboxTrue
Free plan APIWeb - 16
Mailbeam
Free plan APIWebMailbeam 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.
- 17
MailboxValidator
Free plan APIWebMailboxValidator offers both API and bulk-list checking, with a wide set of validation checks and integrations.
- 18
MailerCheck
Free plan APIWeb - 19
Reacher
Free plan APISelf-hostedWebReacher provides flexible verification through an API, dashboard, or self-hosted deployment.
- 20
ZeroBounce
Free plan AndroidAPIExtension+2ZeroBounce combines list validation with deliverability monitoring and related email tools.
- 21
MillionVerifier
Free plan APIWebMillionVerifier combines list, API, and connected-account checks with disposable detection and catch-all verification.
- 22
Proofy
Free plan APIWebProofy combines one-off checks, bulk verification, API workflows, and form integrations.
- 23
QuickEmailVerification
Free plan APIWebQuickEmailVerification 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.
- 24
Reoon Email Verifier
Free plan APIWebReoon 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.
- 25
Trueguard Email Verification API
Free plan APIWeb
#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price
Compare free plans, free trials, and paid starting prices before choosing. Check whether you need an API, web tool, browser extension, self-hosted option, iOS app, or Android app; if code access matters, review the licence.
Questions
What does an email verification API do?
It checks email addresses using options such as real-time API calls, batch verification, disposable detection, role account detection, catch-all detection, and SMTP mailbox checks.
Can I use an email verification service for free?
A free plan is offered by services in this category, but availability and limits differ. Check the plan details before relying on free use.
Which email verification tools offer a free trial?
Byteplant Email Validator lists a free trial. Check current trial terms and limits before signing up.
What is the lowest listed paid starting price?
CaptainVerify lists pricing from $7. Other listed starts include Bouncer at $8 and Email Hippo at $9.88 per month.
Which platforms can these tools use?
Platforms represented in this category include API, web, extension, self-hosted, iOS, and Android. Confirm the platform for the service you plan to use.