Writing · Vendor site 2026-10-04
MailTester Ninja is an email checker and verifier that validates addresses in real time without sending mail, aiming to cut bounces and protect sender reputation. The site stresses that checks store nothing and offers related deliverability tools plus API access for higher volumes.
Understand the total cost
Free
Free
FAQ states you can check email addresses for free on mailtester.ninja with no signup; higher volumes use an affordable API key.
No retained pricing changes yet. A current price alone does not establish a historical trend.
Reviewed vendor source
Read original source ↗Facts apply to the named version and check date. Send a sourced correction if something changed.
Yes. MailTester.Ninja has an ongoing free plan. FAQ states you can check email addresses for free on mailtester.ninja with no signup; higher volumes use an affordable API key.
MailTester.Ninja is listed as free. No paid plan with a published price was found.
API or developer access is mentioned. Marketing pages link to an Email Checker API product for higher-volume verification beyond the free checker.