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MailTester Ninja pricing: email verification API

MailTester Ninja's sitellms.txtBest email verification API in 2026: providers comparedMailTester Ninja: email verification API alternatives

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50% complete: 3 of the 6 key fields we checkSee the 6 fields
$0.00per 1,000 emailsWe rank 3,214 plans by price. treg's top-up from $10 costs the least per 1,000 emails: $0.00 on average. treg asks one provider after another until one answers. You pay $68.365 per 1,000 emails when no provider answers.Disify's $9 monthly plan (/email) covers any number of emails. Disify's $9 monthly plan costs less up front than treg's top-up from $10.MailTester Ninja, Signaliz and Enrich.so are the best email verification API providers in our benchmark.
Plan: No token one of MailTester Ninja's 4 plans
Call: GET /ninja MailTester Ninja's only call for this API
API: Email verification API one of MailTester Ninja's 2 APIs

About this item

  • Live. MailTester Ninja checks the email when you call the API.
  • 3 of the 6 key fields we check. Address, Deliverability, Company.
  • Nothing to pay. You get up to 300 calls a month.
  • One call. You send email to GET /ninja. The call returns whether the address takes mail.
  • Who can get it: anyone at least 18 years old, or the age of majority in their jurisdiction. Keep data: no limit. Use data: with conditions.

MailTester Ninja: email verification API alternatives

MailTester Ninja alternatives: every email verification API provider ranked

The table starts with MailTester Ninja's cheapest paid plan. Next come plans from other providers with the price per 1,000 emails closest to MailTester Ninja's. Each plan in the table gives live data.

MailTester Ninja, $39.99 monthlytreg, top-up from $200Unisender Go, ₽547,200 yearly, By invoice, 12 months prepaid, 36,000,000 emails in 12 months, first 100 validations a monthUniOne, $850 monthly, Standard, 3,000,000 emails a month, first 6,000 validations a monthStopBouncing, freeGMass, $349 yearly
$ per 1,000 emails$0.0067$0.00$0.00$0.00$0.00$0.0081
Completeness50%33%50%50%33%33%
Billingmonthlypay firstyearlymonthlyfreeyearly
Pay$39.99$200₽547,200$850€0$349
Enough for6,000,000 calls a monthnot publishedas many as you pay foras many as you pay for100 calls, once3,600,000 calls a month
Freshnesslivelivelivelivelivelive
Who can get itanyone at least 18 years old, or the age of majority in their jurisdictionanyone 16 or over, topping up by hand (automatic top-ups earn no bonus)anyone who signs the invoice contract, a tariff by invoice being connected through supportanyone, a company or a person 18 or older, using the service for commercial purposesanyone who verifies their email addressanyone with a Google account that subscribes

Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-02.

  1. mailtester.ninja/api/
  2. mailtester.ninja/free-email-verification-api/
  3. mailtester.ninja/openapi.json
  4. mailtester.ninja/pricing.json
  5. mailtester.ninja/terms-of-use/
  6. mailtester.ninja/verify-emails-unlimited/

Product details

The key fields this plan's answer can hold, then each filled column in its row on the sheet.

  • Address
  • Deliverability
  • Confidence, not in the answer
  • Name, not in the answer
  • Place, not in the answer
  • Company
Price
$ per 1,000 emails$0.00
Percall
Billingfree
Aggregators
Aggregatorsnone
Charges
Also pays fornothing else
Not found
$ per 1,000$0.00
In their words
Their pitchChecks in real time whether an email address exists and can receive mail, by asking the recipient's mail server. No message is sent.
Data
Freshnesslive
What it checksmail servers, disposable domains, mailbox
Keep datano limit
Use dataYou may use the Service only to verify email addresses that you have a legitimate reason to check [...] You must comply with all applicable laws, including anti-spam and data-protection laws (such as the UK GDPR, EU GDPR and the US CAN-SPAM Act). You must not, and must not allow anyone else to: Directory harvesting / dictionary attacks — submitting generated, guessed, sequential or otherwise fabricated addresses in order to discover which ones exist on a domain. Verify purchased, scraped, rented or otherwise non-consented email lists, or use the Service to enable the sending of unsolicited bulk email (spam), phishing or malware. Use the Service to harass, defraud, or target individuals, or for any unlawful, deceptive or harmful purpose. Circumvent, disable or exceed rate limits or plan quotas, share, resell, sublicense or redistribute the Service or your API key without our written consent. Reverse-engineer, scrape, or attempt to derive the underlying methods of the Service, or interfere with its normal operation.
Plan
Pay$0
Enough for300 calls a month
Rate limit
Per day10
Per second0.033
Batch1
Speed
Answerin the call
Median1.07 s
The call
You sendemail
MethodGET
Path/ninja
About the plan
PlanNo token
Who can get itanyone at least 18 years old, or the age of majority in their jurisdiction
The 9 fields the plan's answer can hold

status, message, email address, user, domain, mail server, connections, daily limit, rate

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