MailTester.Ninja
MailTester Ninja is a tool designed to help users verify or find email addresses.
MailTester Ninja is a tool designed to help users verify or find email addresses.
Mindber Score™
Score pending - additional data required
Mindber Score™
Score pending - additional data required
Starting price
Pricing unverified
Best for
Mail Assistant
Free trial
✓ Free tier
Explore options
See how MailTester.Ninja compares
MailTester.Ninja is a practical fit for buyers evaluating Mail Assistant, Efficiency tools, and #Email verification tools.
- What is MailTester.Ninja?
- MailTester Ninja is a tool designed to help users verify or find email addresses. It can help users maximize email deliv，MailTester Ninja is a tool designed to help users verify or find email addresses. It can help users maximize email delivery rates and avoid bounces and blacklists. This tool has rich background information, is affordable, and is positioned to provide accurate and timely email verification services Target UsersMailTester Ninja is suitable for users who need to maintain a high email delivery rate and avoid email bounces and blacklists. By verifying email addresses, finding new contacts, and analyzing email usage, users can better manage their email lists and improve the effectiveness of email sending.Use CasesEnterprises sending a large number of emails need to ensure high delivery rates and valid contacts.Marketers are looking for new potential customer contact information.Individuals who send emails frequently hope to maintain the accuracy and validity of their emails.FeaturesVerify email addresses to avoid bounces and blacklists (Verify email addresses to ensure the accuracy and validity of emails and improve delivery rates).Find email addresses to expand the contact scope (Find new contacts according to needs and expand the email list).Provide email usage statistics (Analyze email usage to understand the effectiveness of email sending).Support API integration (Highly flexible and can be integrated with other applications).Provide resource blogs and help centers (Provide resources and guidance related to email verification).How to UseVisit the official website of MailTester Ninja: https://mailtester.ninjaClick the 'Check or Find' button to verify or find email addresses.Drag and drop text files (in.txt or.csv format) into the specified area for batch verification.Optimize the email list based on the verification results to improve the email delivery rate.Explore API integration, resource blogs, and help centers to learn more about its functions and uses.
- Who is it for?
- Email marketers who need to clean large contact lists before campaigns; better than manual spreadsheet checks for batch .csv verification and bounce reduction.
- Pricing
- freemium · View pricing
Product information
What this product does
MailTester Ninja is a tool designed to help users verify or find email addresses. It can help users maximize email deliv，MailTester Ninja is a tool designed to help users verify or find email addresses. It can help users maximize email delivery rates and avoid bounces and blacklists. This tool has rich background information, is affordable, and is positioned to provide accurate and timely email verification services Target UsersMailTester Ninja is suitable for users who need to maintain a high email delivery rate and avoid email bounces and blacklists. By verifying email addresses, finding new contacts, and analyzing email usage, users can better manage their email lists and improve the effectiveness of email sending.Use CasesEnterprises sending a large number of emails need to ensure high delivery rates and valid contacts.Marketers are looking for new potential customer contact information.Individuals who send emails frequently hope to maintain the accuracy and validity of their emails.FeaturesVerify email addresses to avoid bounces and blacklists (Verify email addresses to ensure the accuracy and validity of emails and improve delivery rates).Find email addresses to expand the contact scope (Find new contacts according to needs and expand the email list).Provide email usage statistics (Analyze email usage to understand the effectiveness of email sending).Support API integration (Highly flexible and can be integrated with other applications).Provide resource blogs and help centers (Provide resources and guidance related to email verification).How to UseVisit the official website of MailTester Ninja: https://mailtester.ninjaClick the 'Check or Find' button to verify or find email addresses.Drag and drop text files (in.txt or.csv format) into the specified area for batch verification.Optimize the email list based on the verification results to improve the email delivery rate.Explore API integration, resource blogs, and help centers to learn more about its functions and uses.
Sourced from mailtester.ninja
Works With
Platforms
- Web
- API
Problem Solved
What problem does MailTester.Ninja solve?
It's for email marketers, sales teams, and growth operators who send cold or bulk email. Today they manually clean lists or use tools that store verified addresses, creating GDPR risk and still leaving high bounce rates that damage sender reputation. MailTester.Ninja verifies each address in real time and never stores it, so lists stay clean and compliant. For example, a marketer uploading a 5,000-contact list gets invalid addresses flagged instantly, keeping bounce rates under 1% and protecting their domain.
Company & Maker
Who built MailTester.Ninja?
- Company
- MailTester.Ninja
- Product
- MailTester Ninja is a tool designed to help users verify or find email addresses. It can help users maximize email deliv，MailTester Ninja is a tool designed to help users verify or find email addresses. It can help users maximize email delivery rates and avoid bounces and blacklists. This tool has rich background information, is affordable, and is positioned to provide accurate and timely email verification services Target UsersMailTester Ninja is suitable for users who need to maintain a high email delivery rate and avoid email bounces and blacklists. By verifying email addresses, finding new contacts, and analyzing email usage, users can better manage their email lists and improve the effectiveness of email sending.Use CasesEnterprises sending a large number of emails need to ensure high delivery rates and valid contacts.Marketers are looking for new potential customer contact information.Individuals who send emails frequently hope to maintain the accuracy and validity of their emails.FeaturesVerify email addresses to avoid bounces and blacklists (Verify email addresses to ensure the accuracy and validity of emails and improve delivery rates).Find email addresses to expand the contact scope (Find new contacts according to needs and expand the email list).Provide email usage statistics (Analyze email usage to understand the effectiveness of email sending).Support API integration (Highly flexible and can be integrated with other applications).Provide resource blogs and help centers (Provide resources and guidance related to email verification).How to UseVisit the official website of MailTester Ninja: https://mailtester.ninjaClick the 'Check or Find' button to verify or find email addresses.Drag and drop text files (in.txt or.csv format) into the specified area for batch verification.Optimize the email list based on the verification results to improve the email delivery rate.Explore API integration, resource blogs, and help centers to learn more about its functions and uses.
- HQ
- London
- Founded
- 2018
- Team size
- 2-10
- Live since
- Oct 2018
Some facts above are based on publicly available information and may have changed.
The maker hasn't published a public statement we can verify yet.
Researched with AI · Data refreshed 56 minutes ago · How we score
Explore options
Unlock preview
Score generating — full report available when data is complete
MailTester.Ninja is an email verification and email-finding tool that checks addresses for validity and deliverability, supports batch file uploads and API integration, and is aimed at senders who need to reduce bounces and protect sender reputation.
Who should use
Buyer-fit is derived from approved personas and use-case evidence. Search-volume noise stays labeled separately.
Best-fit workflows
- Enterprises sending a large number of emails need to ensure high delivery rates and valid contacts
- Marketers are looking for new potential customer contact information
- Individuals who send emails frequently hope to maintain the accuracy and validity of their emails
- Verifies uploaded .csv or .txt email lists in batch to remove invalid addresses before a campaign.
- Finds new contact email addresses to expand an outreach list.
- Checks individual email addresses one at a time through the 'Check or Find' interface.
Pricing reality
Vendor stated
Affordable; exact pricing not publicly specified in the provided evidence.
Actual cost
Unknown; no public pricing tiers, credit limits, or overage details were provided.
Hidden costs
3 hidden cost warnings — unlock to view
Pricing reality
Verified Oct 2026 / Vendor pricing evidence only
Starting price
Pricing unverified
Free tier reported; paid-plan amounts are not verified yet.
Mindber only shows named plan cards when they come from linked pricing evidence. If the tier data is incomplete, this page falls back to the verified starting price instead of fabricating plan names or $0 tiers.
What pricing pages often hide
True cost for your case
LIVE ESTIMATEEstimated spend
--Starting price has not been verified from a linked pricing source yet.
Compare this product in-line
Start with a suggested alternative or type another tool to jump into a side-by-side comparison.
Engagement signals (30d)
Based on 6 linked public signals.
Mindber Activity Score™
Score locked
HOW THIS TOOL SCORES
Scores compare this tool with similar tools similar tools in Mail Assistant. Use it to judge Innovation and Capability before you shortlist.
Innovation Index™
Is it new, different, and easy to understand?
Medium confidence (50%) - some sub-scores have thin evidence.What this means →
Functionality Score™
Does it cover the jobs buyers expect, and can it keep up?
Low confidence (30%) - some sub-scores have thin evidence.What this means →
Traffic & search proof
Public view keeps the ratio story. Paid view unlocks exact monthly visits, full region coverage, and CPC-level keyword intelligence.
Latest traffic snapshot
Monthly visits
73.5K
Avg visit duration
00:00:36
Pages per visit
1.84
Bounce rate
37.64%
Traffic trend
Month-by-month visits from linked public traffic evidence.
Geography
Top regions
Exact monthly traffic is paid-only. Public view keeps percent share only.
Traffic sources
Source mix snapshot
Public view keeps the ratio snapshot. Minor channels stay behind the paid view.
FAQ
Only linked Q and A rows are shown. Empty FAQ data stays hidden.
Social mentions
Only linked public mention evidence is shown here.
Sources and methodology
Only evidence with a linked source record or explicit feature provenance is shown here. Data without provenance stays off the page.
COMMUNITY CREDITS
Have you used MailTester.Ninja? Earn credits.
Verified contributions help the page stay honest. The wider member action set still lives in your dashboard so the public page stays focused on the two highest-signal workflows.
Write a verified review (200+ words) → earn 1 credit
Share the setup context, what worked, and what broke. Mindber rewards specific, evidence-backed reviews instead of one-line praise.
Write verified reviewSpot incorrect data? Submit a correction → earn 1 credit
Flag stale pricing, wrong traffic signals, or broken links and the editorial team will re-verify the record.
Submit correctionMaker access, comments, ratings, and verification requests remain available inyour dashboard.
Community audits
Member opinion — not a Mindber assessment
Be the first to audit MailTester.Ninja
No member audits yet. Rate it from 1 to 5 and share what worked and what didn't.