# The Data Group, free: Email verification API

> Validate the accuracy and status of consumer email addresses. This email verification service is built for high-scale processing and low-latency integration into lead forms and CRM systems.

The Data Group's email verification API on its Free test plan. It costs $0.00 per 1,000 emails. It returns 2 of the 6 key fields we check: Address, Deliverability.
We haven't run The Data Group through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
This plan is free. We rank 3,338 plans for email verification APIs by price. Half the plans cost $1.98 per 1,000 emails or less.
[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/the-data-group/free
- [Email validation API: 160+ providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://thedatagroup.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://api.tdg1.io/v2/verify/email`
- API key: with the plan, on https://thedatagroup.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://thedatagroup.com/api/email-validation-api-documentation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: The Data Group (https://thedatagroup.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-04

## In the answer

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

## Price

- $ per 1,000 emails: $0.00
- Per: call
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Validate the accuracy and status of consumer email addresses. This email verification service is built for high-scale processing and low-latency integration into lead forms and CRM systems.

## Data

- Freshness: live
- What it checks: disposable domains, mailbox
- Keep data: "All Data provided under this Agreement is only available for Licensee’s one-time use." [...] "Licensee shall not make or cause to make any copies of the Data for any reason." [...] On termination or expiration: "Licensee shall not retain any portion of the Data and shall discontinue all use of the Data and, within thirty (30) days, erase, purge, destroy and/or return to Data Group any and all Data"
- Use data: "Licensee agrees that it shall use the Data only for its own internal and lawful direct marketing purposes." [...] "Licensee shall not provide the Data, in whole or in part, nor shall it provide any subset of the Data, to any third party as a stand-alone product, file or database." [...] "Licensee is prohibited from reselling, sublicensing, or otherwise providing the Data to any third-party." [...] "Licensee shall not use any Data as a factor in determining a consumer’s credit qualifications for (a) credit or insurance used primarily for personal, family or household purposes, (b) employment purposes, or (c) other purposes set forth in Section 604 of the FCRA" [...] "Licensee shall not use the Data as part of an application that provides name or phone number lookups to companies providing live-operator directory assistance services."

## Plan

- Pay: $0
- You get: 100 requests
- Enough for: 100 calls

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: Email
- Method: POST
- Path: /verify/email

## About the plan

- Plan: Free test
- Who can get it: anyone

## The 2 fields the plan's answer can hold

email address, result

## The Data Group's plans (2)

- [The Data Group, free](https://datacircle.dev/validate-email-apis/the-data-group/free/llms.txt): $0.00 per 1,000, 33% complete, live
- [The Data Group, contact us](https://datacircle.dev/validate-email-apis/the-data-group/contact-us/llms.txt): 33% complete, live

## The Data Group's calls for this API (1)

- `POST /verify/email`: [The Data Group, free](https://datacircle.dev/validate-email-apis/the-data-group/free/llms.txt)

## The Data Group's APIs (6)

- [The Data Group: email verification API pricing, 2 plans](https://datacircle.dev/validate-email-apis/the-data-group/free/llms.txt)
- [The Data Group: email finder API pricing, 3 plans](https://datacircle.dev/find-email-apis/the-data-group/free/llms.txt)
- [The Data Group: phone finder API pricing, 3 plans](https://datacircle.dev/find-phone-apis/the-data-group/free/llms.txt)
- [The Data Group: phone validation API pricing, 3 plans](https://datacircle.dev/validate-phone-apis/the-data-group/free/llms.txt)
- [The Data Group: reverse email lookup API pricing, 3 plans](https://datacircle.dev/reverse-email-lookup-apis/the-data-group/free/llms.txt)
- [The Data Group: people enrichment API pricing, 3 plans, POST /append/demographic](https://datacircle.dev/person-enrichment-apis/the-data-group/free-test-post-append-demographic/llms.txt)
- [The Data Group: people enrichment API pricing, 3 plans, POST /lookup/phone](https://datacircle.dev/person-enrichment-apis/the-data-group/free-test-post-lookup-phone/llms.txt)

## The Data Group: email verification API alternatives

- [MailTester Ninja, free, No token](https://datacircle.dev/validate-email-apis/mailtester-ninja/free-no-token/llms.txt): $0.00 per 1,000, 50% complete, live
- [Enrich.so, free, POST /email-validation](https://datacircle.dev/validate-email-apis/enrich-so/free/llms.txt): $0.00 per 1,000, 50% complete, live
- [GetProspect, free, POST /v2/email-verifications](https://datacircle.dev/validate-email-apis/getprospect/free-free-post-v2-email-verifications/llms.txt): $0.00 per 1,000, 50% complete, live
- [Sealch, free, POST /api/verify](https://datacircle.dev/validate-email-apis/sealch/free-free-post-api-verify/llms.txt): $0.00 per 1,000, 17% complete, live
- [Omkar Cloud, free](https://datacircle.dev/validate-email-apis/omkar-cloud/free/llms.txt): $0.00 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 2026-11-04.

- https://thedatagroup.com/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://thedatagroup.com/api/email-validation-api-documentation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://thedatagroup.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://thedatagroup.com/terms-condition?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing