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Clearout Email Verification vs MailboxValidator

Both stand on email verification apis. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

Clearout Email Verification

Free plan APIExtensionWeb

Clearout provides several ways to check email addresses, from a single entry to bulk lists and API workflows. Its free plan and 100 signup credits offer a starting point, while paid pricing begins at $16/mo (annual).

Visit Clearout Email Verification

MailboxValidator

Free plan APIWeb

MailboxValidator offers both API and bulk-list checking, with a wide set of validation checks and integrations. Before choosing it, consider its Yahoo and non-ASCII limitations, and review the stated retention policy.

Visit MailboxValidator

The facts

Clearout Email VerificationMailboxValidator
Free planYesYes
Open sourceNot publishedNot published
Runs onAPI, Extension, WebAPI, Web
Lowest paid planFree or on requestSee the plans
Plans published410
MakerNot publishedNot published
Websiteclearout.iomailboxvalidator.com
On email verification apis#3 of 31#17 of 31

Clearout Email Verification: what it does well

  • Supports individual, bulk, and API verification
  • Checks more than 20 email validation signals
  • New users receive 100 free credits
  • Unknown results and same-list duplicates are not charged

What to know first

  • One credit is used for each valid, invalid, or catch-all result
  • Uploaded CSV and XLSX lists are limited to 1 million emails per file

MailboxValidator: what it does well

  • Bulk validation accepts text or CSV lists.
  • Single-address API results are available in JSON or XML.
  • Checks include disposable addresses, DMARC, and strict SPF.
  • Free API plan lists 300 queries per month.

What to know first

  • Yahoo email validations are unsupported.
  • Non-ASCII addresses are marked invalid.
  • The FAQ says refunds are not offered.
  • Personal data is retained indefinitely, subject to policy limits.

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