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GMass pricing: email verification API

GMass's sitellms.txtBest email verification API in 2026: providers comparedGMass: email verification API alternatives

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33% complete: 2 of the 6 key fields we checkSee the 6 fields
$0.011per 1,000 emailsHalf of the 3,214 plans we rank by price cost $1.998 per 1,000 emails or less. This plan costs less per 1,000 emails than 97% of the 3,214 plans.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: Premium one of GMass's 14 plans
Call: GET /verify GMass's only call
API: Email verification API GMass's only API

About this item

  • Live. GMass checks the email when you call the API.
  • 2 of the 6 key fields we check. Address, Deliverability.
  • A monthly subscription. You pay $39.95 a month for up to 3,600,000 calls.
  • One call. You send email to GET /verify. The call returns whether the address takes mail.
  • Who can get it: anyone with a Google account that subscribes. Keep data: no API terms. Use data: no API terms.

GMass: email verification API alternatives

GMass alternatives: every email verification API provider ranked

We list other providers' plans closest to this plan in price per 1,000 emails. Each plan in the table gives live data.

This planGMass, $39.95 monthlyEnrich.so, free, POST /email-validation/batchtreg, top-up from $200GetProspect, free, GET /v2/email-verifierVerifiedEmail, freeMailTester Ninja, $23.99 monthly
$ per 1,000 emails$0.011$0.00$0.00$0.00$0.00$0.008
Completeness33%50%33%50%50%50%
Billingmonthlyfreepay firstfreefreemonthly
Pay$39.95$0$200$0$0$23.99
Enough for3,600,000 calls a month100 results, oncenot published100 calls a month200 results, once3,000,000 calls a month
Freshnesslivelivelivelivelivelive
Who can get itanyone with a Google account that subscribesanyone 18 or over, on a new account, for an organization, someone with authority to bind itanyone 16 or over, topping up by hand (automatic top-ups earn no bonus)anyone 16 or overanyone 18 or older who isn't a resident of an OFAC-sanctioned country, for their own internal business purposesanyone at least 18 years old, or the age of majority in their jurisdiction

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. gmass.co/blog/email-verification-service/
  2. gmass.co/blog/gmass-terms-of-use/
  3. gmass.co/faq
  4. gmass.co/features/api
  5. gmass.co/pricing

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, not in the answer
Price
$ per 1,000 emails$0.011
Percall
Billingmonthly
$ a month$39.95
Aggregators
Aggregatorsnone
Charges
Also pays forListing your Google Sheets and their worksheets · Creating a new email list · Creating a new campaign · Retrieving reports and statistics · Sending transactional emails · Unsubscribing an email address
Not found
$ per 1,000$0.00
In their words
Their pitchWe are now offering a free email verification service. [...] Finally, you can use our API to integrate our email validator into your own software.
Data
Freshnesslive
What it checksformat, mail servers, mailbox
Keep datano API terms
Use datano API terms
Plan
Pay$39.95
Enough for3,600,000 calls a month
Rate limit
Per second1.39
Batch1
Speed
Answerin the call
The call
You sendemail
MethodGET
Path/verify
About the plan
PlanPremium
Who can get itanyone with a Google account that subscribes
The 6 fields the plan's answer can hold

success, email address, valid, status, status code, SMTP transaction

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