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MailTester Ninja

Freemium#33 of 36 in Email Verification Services

MailTester Ninja: Browser, desktop and API checks pair email verification with business contact finding. Ranked #33 of 36 in Email Verification Services by our editors (5.4/10); pricing: Free plan; best for small teams wanting desktop access and email finding.

5.4/10Editor score

Try MailTester Ninja

MailTester Ninja5.4 Try MailTester Ninja

At a glance

Editor score
5.4 / 10
Pricing
Free plan
Best for
Small teams wanting desktop access and email finding
Free plan
Yes
Paid from
$23.99/mo
Facts checked
23 Sep 2026

Where it wins
- Verifies single addresses and bulk lists via text or CSV upload
- Checks SMTP, syntax and domain/MX, with disposable and spam-trap detection
- Offers a REST API and an email finder for business contacts
Where it doesn't
- Starter is billed weekly, unlike the monthly Pro and Ultimate plans
- Desktop apps are available for Windows and macOS only
- Support is documentation-only

Our verdict on MailTester Ninja

MailTester Ninja combines email verification with a business email finder for marketers, sales teams and developers who need to clean lists or check addresses as they are submitted. Single addresses can be checked in a browser, while bulk verification accepts text and CSV uploads. A REST API supports address checks in other systems, and a standalone desktop app is available for bulk work. The product also checks SMTP, syntax and domain/MX information, and detects disposable addresses, catch-all domains and spam traps.

The free plan provides single-address checks on the website. Paid plans specify daily rather than monthly quotas: Starter costs $6.99 per week and lists 100,000 emails and 100,000 API calls daily; Pro costs $23.99 per month with the same daily limits; Ultimate costs $39.99 per month and raises both to 200,000 daily. All three plans state that no personal data is stored. The weekly Starter billing is worth weighing against the monthly options, particularly for teams comparing recurring costs.

Platform coverage spans web, Windows, macOS and API access, making it suitable for teams that want desktop bulk verification alongside browser checks or programmatic use. The feature set is broad for list hygiene and contact discovery, but the published support channel is documentation, and integrations are not listed. Teams that need direct support or established integrations should consider alternatives; small teams seeking desktop access, API checks and email finding may find the combination a closer fit.

Your product? Our editors can test MailTester Ninja in depth and publish a review, labelled as paid · from $149/mo →

MailTester Ninja pricing

Plans Free planFreemium A usable free plan; paid tiers unlock the limits above. Prices checked 23 Sep 2026.

See plans on mailtester.ninja

All 3 MailTester Ninja plans and prices →

MailTester Ninja fact sheet

Free plan	Yes
Paid from	$23.99/mo
Bulk list upload	Yes
API access	Yes
Real-time form checks	Yes
Disposable detection	Yes
Credit rollover	Not verified
Monthly verification credits	Not verified
Deployment	Cloud, Desktop
Platforms	Web, Windows, macOS
Compliance & security	GDPR
Support	Docs · 24/7
Built for	Solo, Small business, Mid-market (editorial estimate)
Pricing	Free plan (source)
Website	mailtester.ninja
Facts checked	23 Sep 2026

Alternatives to MailTester Ninja

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Featured on iTechGuides

MailTester Ninja is listed in our Email Verification Services directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update