# GMass, $39.95 monthly: Email verification API

> We are now offering a free email verification service. [...] Finally, you can use our API to integrate our email validator into your own software.

GMass's email verification API on its Premium plan. It costs $0.011 per 1,000 emails. It returns 2 of the 6 key fields we check: Address, Deliverability.
You pay $39.95 a month for up to 3,600,000 calls.
Half of the 3,215 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 3,215 plans.
[treg's top-up from $10](https://datacircle.dev/validate-email-apis/treg/top-up-from-10/llms.txt) is the cheapest paid plan 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)](https://datacircle.dev/validate-email-apis/disify/9-monthly-starter-post-email/llms.txt) covers any number of emails. Disify's $9 monthly plan costs less up front than treg's top-up from $10.
[MailTester Ninja](https://datacircle.dev/validate-email-apis/mailtester-ninja/23-99-monthly/llms.txt), [Enrich.so](https://datacircle.dev/validate-email-apis/enrich-so/499-monthly/llms.txt) and [GetProspect](https://datacircle.dev/validate-email-apis/getprospect/369-pack/llms.txt) are the best email verification API providers in our benchmark.

- This page: https://datacircle.dev/validate-email-apis/gmass/39-95-monthly
- [Best email verification API in 2026: providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://www.gmass.co/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `GET https://verify.gmass.co/verify`
- API key: with the plan, on https://www.gmass.co/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://www.gmass.co/blog/email-verification-service/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: GMass (https://www.gmass.co?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-02

## In the answer

- Completeness: 33%
- Address: ✓
- Deliverability: ✓

## Price

- $ per 1,000 emails: $0.011
- Per: call
- Billing: monthly
- $ a month: $39.95

## Aggregators

- Aggregators: none

## Charges

- Also pays for: Listing 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 pitch: We are now offering a free email verification service. [...] Finally, you can use our API to integrate our email validator into your own software.

## Data

- Freshness: live
- What it checks: format, mail servers, mailbox
- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: $39.95
- Enough for: 3,600,000 calls a month

## Rate limit

- Per second: 1.39
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email
- Method: GET
- Path: /verify

## About the plan

- Plan: Premium
- Who can get it: anyone with a Google account that subscribes

## The 6 fields the plan's answer can hold

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

## GMass's plans (14)

- [GMass, $39.95 monthly](https://datacircle.dev/validate-email-apis/gmass/39-95-monthly/llms.txt): $0.011 per 1,000, 33% complete, live
- [GMass, $59.95 monthly](https://datacircle.dev/validate-email-apis/gmass/59-95-monthly/llms.txt): $0.017 per 1,000, 33% complete, live
- [GMass, $175 monthly](https://datacircle.dev/validate-email-apis/gmass/175-monthly/llms.txt): $0.049 per 1,000, 33% complete, live
- [GMass, $295 monthly](https://datacircle.dev/validate-email-apis/gmass/295-monthly/llms.txt): $0.082 per 1,000, 33% complete, live
- [GMass, $725 monthly](https://datacircle.dev/validate-email-apis/gmass/725-monthly/llms.txt): $0.201 per 1,000, 33% complete, live
- [GMass, $1,350 monthly](https://datacircle.dev/validate-email-apis/gmass/1350-monthly/llms.txt): $0.375 per 1,000, 33% complete, live
- [GMass, $2,200 monthly](https://datacircle.dev/validate-email-apis/gmass/2200-monthly/llms.txt): $0.611 per 1,000, 33% complete, live
- [GMass, $349 yearly](https://datacircle.dev/validate-email-apis/gmass/349-yearly/llms.txt): $0.0081 per 1,000, 33% complete, live
- [GMass, $599 yearly](https://datacircle.dev/validate-email-apis/gmass/599-yearly/llms.txt): $0.014 per 1,000, 33% complete, live
- [GMass, $1,750 yearly](https://datacircle.dev/validate-email-apis/gmass/1750-yearly/llms.txt): $0.041 per 1,000, 33% complete, live
- [GMass, $2,950 yearly](https://datacircle.dev/validate-email-apis/gmass/2950-yearly/llms.txt): $0.068 per 1,000, 33% complete, live
- [GMass, $7,250 yearly](https://datacircle.dev/validate-email-apis/gmass/7250-yearly/llms.txt): $0.168 per 1,000, 33% complete, live
- [GMass, $13,500 yearly](https://datacircle.dev/validate-email-apis/gmass/13500-yearly/llms.txt): $0.313 per 1,000, 33% complete, live
- [GMass, $22,000 yearly](https://datacircle.dev/validate-email-apis/gmass/22000-yearly/llms.txt): $0.509 per 1,000, 33% complete, live

## GMass's calls (1)

- `GET /verify`: [GMass, $39.95 monthly](https://datacircle.dev/validate-email-apis/gmass/39-95-monthly/llms.txt)

## GMass's APIs (1)

- [GMass: email verification API pricing, 14 plans](https://datacircle.dev/validate-email-apis/gmass/39-95-monthly/llms.txt)

## GMass: email verification API alternatives

- [Enrich.so, free, POST /email-validation/batch](https://datacircle.dev/validate-email-apis/enrich-so/free-free-post-email-validation-batch/llms.txt): $0.00 per 1,000, 50% complete, live
- [GetProspect, free, GET /v2/email-verifier](https://datacircle.dev/validate-email-apis/getprospect/free-free-get-v2-email-verifier/llms.txt): $0.00 per 1,000, 50% complete, live
- [Sealch, free, POST /api/verify/bulk](https://datacircle.dev/validate-email-apis/sealch/free/llms.txt): $0.00 per 1,000, 17% complete, live
- [Xverify, free](https://datacircle.dev/validate-email-apis/xverify/free/llms.txt): $0.00 per 1,000, 33% complete, live
- [MailTester Ninja, $23.99 monthly](https://datacircle.dev/validate-email-apis/mailtester-ninja/23-99-monthly/llms.txt): $0.008 per 1,000, 50% complete, live

## 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.

- https://www.gmass.co/blog/email-verification-service/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.gmass.co/blog/gmass-terms-of-use/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.gmass.co/faq?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.gmass.co/features/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.gmass.co/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing