# Defastra, free: Email verification API

> Risk scoring with real-time data enrichment for email addresses.

Defastra's email verification API on its Free credit plan. It costs $0.00 per 1,000 emails. It returns 4 of the 6 key fields we check: Address, Deliverability, Name, Place.
We haven't run Defastra through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
This plan is free. We rank 3,341 plans for email verification APIs by price. Half the plans cost $1.985 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 the Datacircle benchmark.

- This page: https://datacircle.dev/validate-email-apis/defastra/free
- [Email validation API: 160+ providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://docs.defastra.com/docs/how-defastra-pricing-works?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://api.defastra.com/deep_email_check`
- API key: with the plan, on https://docs.defastra.com/docs/how-defastra-pricing-works?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://docs.defastra.com/reference/deep-email-check?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: Defastra (https://defastra.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-03

## In the answer

- Completeness: 67%
- Address: ✓
- Deliverability: ✓
- Name: ✓
- Place: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Deep Phone Check

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Risk scoring with real-time data enrichment for email addresses.

## Data

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

## Plan

- Pay: $0
- You get: $2
- Enough for: about 28 calls, once

## Rate limit

- Per second: 1
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email, Content-Type header "application/x-www-form-urlencoded". Optional: timeout, label
- Method: POST
- Path: /deep_email_check

## About the plan

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

## The 63 fields the plan's answer can hold

success, request ID, wallet balance, risk level, risk score, email address, online profile count, creation date, deliverability, signals, signal name, signal result type, signal detail, online profiles, service error, is registered, name, registered at, location, reviewed count, about, school, work, trips, is verified, profile URL, picture, full name, username, country, country code, city, language, like count, answer count, online, picture last modified, answers list, bio, speaking language, user ID, sign-in methods, age, birth date, first name, last name, occupation, picture count, view count, followers, following, secondary username, Facebook URL, Twitter URL, Instagram URL, gender, Google Maps profile, in-app notification, last update, friends count, subscription status, Skype ID, has Bitmoji

## Defastra's plans (6)

- [Defastra, free](https://datacircle.dev/validate-email-apis/defastra/free/llms.txt): $0.00 per 1,000, 67% complete, live
- [Defastra, top-up, Pay as you go, first 5,000 requests a month](https://datacircle.dev/validate-email-apis/defastra/top-up-pay-as-you-go-first-5000-requests-a-month/llms.txt): $70.00 per 1,000, 67% complete, live
- [Defastra, top-up, Pay as you go, next 15,000 requests a month](https://datacircle.dev/validate-email-apis/defastra/top-up-pay-as-you-go-next-15000-requests-a-month/llms.txt): $60.00 per 1,000, 67% complete, live
- [Defastra, top-up, Pay as you go, next 30,000 requests a month](https://datacircle.dev/validate-email-apis/defastra/top-up-pay-as-you-go-next-30000-requests-a-month/llms.txt): $55.00 per 1,000, 67% complete, live
- [Defastra, top-up, Pay as you go, next 50,000 requests a month](https://datacircle.dev/validate-email-apis/defastra/top-up-pay-as-you-go-next-50000-requests-a-month/llms.txt): $50.00 per 1,000, 67% complete, live
- [Defastra, contact us](https://datacircle.dev/validate-email-apis/defastra/contact-us/llms.txt): 67% complete, live

## Defastra's calls for this API (1)

- `POST /deep_email_check`: [Defastra, free](https://datacircle.dev/validate-email-apis/defastra/free/llms.txt)

## Defastra's APIs (2)

- [Defastra: email verification API pricing, 6 plans](https://datacircle.dev/validate-email-apis/defastra/free/llms.txt)
- [Defastra: phone validation API pricing, 6 plans](https://datacircle.dev/validate-phone-apis/defastra/free/llms.txt)

## Defastra: email verification API alternatives

- [Tomba, $4,968 pack, Scale 600k, GET /email-verifier, Email Verifier, full](https://datacircle.dev/validate-email-apis/tomba/4968-pack-scale-600k-get-email-verifier-email-verifier-full/llms.txt): $49.68 per 1,000, 50% complete, live
- [IPQualityScore, $5,999.88 yearly](https://datacircle.dev/validate-email-apis/ipqualityscore/5999-88-yearly/llms.txt): $49.999 per 1,000, 67% complete, live
- [Loqate, $100 pack, Pay-as-you-go $100, GET /EmailValidation/Interactive/Validate/v2.00/json6.ws](https://datacircle.dev/validate-email-apis/loqate/100-pack-pay-as-you-go-100-get-emailvalidation-interactive-validate-v2-00-json6-ws/llms.txt): $50.00 per 1,000, 50% complete, live
- [PeopleSearch.im, $5 pack](https://datacircle.dev/validate-email-apis/peoplesearch-im/5-pack/llms.txt): $50.00 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 2026-11-03.

- https://docs.defastra.com/docs/data-enrichment-introduction?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.defastra.com/docs/deep-email-check-signals?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.defastra.com/docs/do-you-offer-custom-pricing-for-high-usage?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.defastra.com/docs/do-you-offer-trial?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.defastra.com/docs/fraud-prevention-introduction?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.defastra.com/docs/full-data-list?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.defastra.com/docs/how-defastra-pricing-works?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.defastra.com/docs/how-does-my-wallet-gets-debited?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.defastra.com/docs/response-time-timeout-settings?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.defastra.com/docs/what-is-a-batch?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.defastra.com/reference/authentication?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.defastra.com/reference/deep-email-check?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.defastra.com/reference/error-handling?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing