18.1
ZeroBounce verifies email addresses, cleans lists, and offers tools for sender reputation and inbox health.
Free planAndroidiOSWeb
Best Email Verification APIs in 2026
ZeroBounce leads this chart of 31 (8.1/10, free plan). MailboxValidator is next (6.9/10, free plan), and Emailable is the next highest-placed with a free plan (6.8/10). Email verification APIs check whether an address can receive mail and help clean signup or mailing lists. Services may be offered through an API, web app, browser extension or self-hosted setup. Android appears among the platforms in this category, with iOS, web and other access types also listed. Check the platform details for the service you need, then compare free access, pricing and the validation checks it…
26.9
MailboxValidator checks email addresses and mailboxes to help identify invalid addresses and reduce email bounces.
Free planWebAPI
36.8
Emailable verifies email addresses to help keep mailing lists clean and improve deliverability.
Free planWebAPI
- 4
QuickEmailVerification
QuickEmailVerification checks whether email addresses are valid and deliverable, helping businesses reduce bounces.
Free planWebAPI6.8Free plan - 5
EmailValidator
Free planWebAPI6.7Free plan - 6
Mailbeam
Mailbeam is a real-time email verification API for developers who want to check addresses in signup flows.
Free planWebAPI6.7From €19 a month - 7
Reoon Email Verifier
Reoon Email Verifier checks email addresses to help email marketers, list owners, SaaS apps, websites, and lead-generation teams clean their lists.
Free planWebAPI6.7From $9 a month - 8
Abstract Email Validation API
Abstract Email Validation API checks whether submitted email addresses are valid and likely to receive mail.
Free planWebAPI6.6From $17 a month - 9
emailverifier.dev
emailverifier.dev checks email addresses before they enter product workflows such as signups, lead forms, free trials, and CRM imports.
Free planWebAPI6.6Free plan - 10
usecheck
Free planWebAPI6.6From $19 a month - 11
BillionVerify
Free planWebAPI6.5From $8 a year - 12
Email Hippo
WebAPI6.5From $9.88 a month - 13
InboxTrue
Free planWebAPI6.5$50 one-time - 14
Bouncer
Bouncer is an email verification service for checking mailing lists and finding addresses that may bounce before messages are sent.
WebAPI6.4From $25 a month - 15
CaptainVerify
WebAPI6.4From $36 a month - 16
MillionVerifier
MillionVerifier checks email addresses individually, in uploaded lists, or through connected services and API workflows.
WebAPI6.4 - 17
Trueguard Email Verification API
Free planWebAPI6.4From $49.99 a month - 18
Clearout Email Verification
Clearout Email Verification checks email addresses individually, in bulk, or through an API to help reduce bounces and keep lists clean.
WebAPIExtension6.2 - 19
MyEmailVerifier
MyEmailVerifier checks email addresses individually or in bulk using real-time SMTP verification.
Free planWebAPIExtension6.2Free plan - 20
Reacher
WebAPISelf-hosted6.2From €69 a month - 21
Verifalia
Free planWebAPI6.2Free plan - 22
Email Validator
Free planWebAPI6.1Free plan - 23
EmailListVerify
EmailListVerify checks email addresses in uploaded lists and in real time through its API.
WebAPIExtension6.1From €16 a month - 24
MailerCheck
WebAPI6.1 - 25
Email List Validation
WebAPI6.0From $14 a month
Choosing well
Compare plans and starting prices
Items such as Abstract Email Validation API, BillionVerify, Bouncer, Clearout Email Verification and Cloudmersive Email Verification API list free plans. CaptainVerify starts at $7, Emailable at $38, and BriteVerify and DOTS Email Validation show pricing on request.
Check whether a quoted price is monthly, annual or a starting amount. Abstract Email Validation API and Clearout list annual monthly pricing, while Email Hippo lists $9.88 per month.
Check how you will connect
Services in this category provide combinations of API, web, browser extension, self-hosted, iOS and Android access. Match the service's platform details to your workflow before choosing.
Byteplant Email Validator advertises a trial, and free-plan terms vary among services. Confirm the access route and trial conditions on the product page.
Match the checks to your data
Review whether a service handles live API requests, batch jobs or both. Look for the checks your workflow needs: disposable addresses, role accounts, catch-all domains and SMTP mailbox checks.
A service can fit a signup form, a file-cleaning job or both, depending on the API and batch options shown in its details.
Use free access to check fit
A free plan or trial can help you review setup and limits before paying. Byteplant Email Validator advertises a trial, and multiple freemium services list free plans.
Read the plan terms and paid starting point together, since free access and paid pricing vary by service.
Questions people ask
Are these email verification APIs available on Android?
Android appears among the platforms represented here. Check the individual service details; API, web, extension and self-hosted access are also listed.
Do any email verification services offer free access?
Abstract Email Validation API, BillionVerify, Bouncer, Clearout and Cloudmersive list free plans. Byteplant Email Validator advertises a free trial.
Which checks should an email verification API support?
Evaluate real-time API and batch capabilities, along with disposable, role-account, catch-all and SMTP mailbox checks.
What does email verification pricing look like?
Listed starting points include $7 for CaptainVerify, $8 for Bouncer, $17 per month annually for Abstract Email Validation API and $38 for Emailable. Some services require a quote.
Can I use these tools without an app?
Yes. The category includes API and web access, plus browser extension and self-hosted options. Platform coverage varies by service.