MailTester Ninja
MailTester Ninja verifies email addresses, searches for contact emails, and provides an API for connecting verification to other software.
What MailTester Ninja is
MailTester Ninja verifies email addresses, searches for contact emails, and provides an API for connecting verification to other software. Its verifier labels addresses Accepted, Rejected, or Unverifiable, extracts addresses from varied text or list formats, and removes duplicates. Desktop users can upload address lists, export validated results as CSV, or copy them into a spreadsheet. The finder takes a full name and domain to search for a corresponding address, with use restricted to lawful individual lookups rather than harvesting or bulk extraction. A REST API supports integrations such as CRMs and email marketing tools. Pro allows 100,000 emails and API calls daily at $23.99 a month; Ultimate allows 200,000 of each at $39.99 a month. Requests beyond a plan’s daily quota are refused until the next-day reset. The service is available on web, macOS, Windows, and through an API, with real-time form checks and disposable-address detection. Submitted addresses are processed temporarily and deleted after analysis.
Good
- Accepted, Rejected, and Unverifiable results
- Deduplicates addresses from varied input formats
- CSV export and spreadsheet copying on desktop
- REST API for CRM integrations
- Temporary processing with deletion after analysis
Watch out
- Daily quota overages are refused
- Finder prohibits harvesting and bulk extraction
- Paid plans cost 23.99 or 39.99 USD monthly
- Free access is described for checker and verifier
Who it suits
It suits users validating lists, checking forms, or connecting verification to CRM and marketing systems. Desktop users can also export cleaned results for spreadsheet work.
Verdict
MailTester Ninja covers individual checks, bulk desktop workflows, contact finding, and API integration. Its quota enforcement and finder restrictions should be considered before larger or automated use.
Plans and prices
From MailTester Ninja's own pricing page, checked 8 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Pro Plan | $23.99 a month | 100k emails daily · 100k API calls daily · No upfront cost · No personal data stored · Stop anytime · 23.99 USD per month |
| Ultimate Plan | $39.99 a month | 200k emails daily · 200k API calls daily · No upfront cost · No personal data stored · Stop anytime · 39.99 USD per month |
The facts
Each one read from MailTester Ninja's own pages, with the date it was checked.
What it does
- API
- The service offers a REST API for integrating email verification into other solutions, including CRMs and email marketing tools.checked 8 Oct 2026
- API rate limits
- The API page states Pro plans allow 100,000 emails per day and Ultimate allows 200,000, with higher limits available by purchasing additional quantity.checked 8 Oct 2026
- Bulk input and export
- On desktop, users can upload address lists and export validated results as CSV or copy them into a spreadsheet.checked 8 Oct 2026
- Email finder
- The finder accepts a full name followed by a domain to search for the corresponding contact email.checked 8 Oct 2026
- Email verification
- The verifier checks email addresses and reports results as Accepted, Rejected, or Unverifiable.checked 8 Oct 2026
- Finder restriction
- The finder page allows lawful individual lookups and prohibits email harvesting or bulk extraction, with permanent ban as the stated consequence.checked 8 Oct 2026
- GDPR
- The company states that its temporary email processing is conducted in compliance with GDPR.checked 8 Oct 2026
- Input handling
- The verifier extracts and deduplicates email addresses from text or lists in different formats.checked 8 Oct 2026
- Privacy
- The privacy policy says submitted email addresses are processed temporarily and deleted after analysis, and are not stored permanently.checked 8 Oct 2026
- Security
- The privacy policy says it implements appropriate measures to protect against unauthorized access or disclosure.checked 8 Oct 2026
- Support
- The pricing page states global support is available 24/7.checked 8 Oct 2026
- Usage limit behavior
- Requests above a plan’s daily limit are refused and the quota resets the next day.checked 8 Oct 2026
The company
- Company
- MailTester Ninja says it is developed by Unlimited & Limited, a London-based company specializing in email verification and search solutions.checked 8 Oct 2026
- Headquarters
- London, UKchecked 28 Sep 2026
Money
- Free access
- The homepage describes an email checker and verifier as free, and the verifier page offers an upgrade to a paid Pro plan.checked 8 Oct 2026
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