# EmailGuard, free: Email verification API

> Our contact verification tool checks for syntax errors, domain validity, and mailbox existence to ensure addresses are valid and deliverable.

EmailGuard's Free forever plan for the email verification API costs $0.00 per 1,000 emails. EmailGuard's docs list 2 of the 6 fields on our checklist: Address, Deliverability.
We haven't run EmailGuard through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
This plan is free. We rank 4,041 plans for email verification APIs by price. Half the plans cost $1.999 per 1,000 emails or less. [See the best free email verification API plan.](https://datacircle.dev/best-email-verification-api.txt)
[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. [StableEnrich's pay-as-you-go plan](https://datacircle.dev/validate-email-apis/stableenrich/pay-as-you-go-pay-per-request-with-x402-or-mpp-post-api-minerva-validate-emails/llms.txt) costs the least for 10,000 emails a month: $0.05.
[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.
[pingutil](https://datacircle.dev/validate-email-apis/pingutil/free-api-key-post-v1-verify/llms.txt), [looot](https://datacircle.dev/validate-email-apis/looot/top-up/llms.txt) and [MailTester Ninja](https://datacircle.dev/validate-email-apis/mailtester-ninja/23-99-monthly/llms.txt) are the best email verification API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-email-apis/emailguard/free
- [Email validation API: 210+ verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://emailguard.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://app.emailguard.io/api/v1/contact-verification`
- API key: with the plan, on https://emailguard.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://app.emailguard.io/api/reference?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing#tag/contact-verification/POST/api/v1/contact-verification
- Sold by: EmailGuard (https://emailguard.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-07

## In the answer

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

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: Create Domain: single connected domain · Create IMAP/SMTP Email Account: 3 connected email accounts · Create Spam Filter Test: 10 email tests with spam filters · Check Content for Spam: 20 email content spam checks · Create Ad-Hoc Blacklist Check: ad-hoc blacklist checks · SPF Lookup: unlimited SPF, DKIM, DMARC checks · DKIM Lookup: unlimited SPF, DKIM, DMARC checks · DMARC Lookup: unlimited SPF, DKIM, DMARC checks

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Our contact verification tool checks for syntax errors, domain validity, and mailbox existence to ensure addresses are valid and deliverable.

## Data

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

## Plan

- Pay: $0
- You get: 50 credits a month
- Enough for: 50 results a month
- Expires: reset monthly

## Speed

- Answer: by polling

## The call

- You send: csv, name
- Method: POST
- Path: /api/v1/contact-verification

## About the plan

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

## The 7 fields the plan's answer can hold

list name, list status, total contacts, valid contacts, updated at, email, status

## EmailGuard's plans (5)

- [EmailGuard, free](https://datacircle.dev/validate-email-apis/emailguard/free/llms.txt): $0.00 per 1,000, 33% complete, live
- [EmailGuard, $49 monthly](https://datacircle.dev/validate-email-apis/emailguard/49-monthly/llms.txt): $16.333 per 1,000, 33% complete, live
- [EmailGuard, $129 monthly](https://datacircle.dev/validate-email-apis/emailguard/129-monthly/llms.txt): $6.45 per 1,000, 33% complete, live
- [EmailGuard, $199 monthly](https://datacircle.dev/validate-email-apis/emailguard/199-monthly/llms.txt): $3.98 per 1,000, 33% complete, live
- [EmailGuard, contact us](https://datacircle.dev/validate-email-apis/emailguard/contact-us/llms.txt): 33% complete, live

## EmailGuard's calls (1)

- `POST /api/v1/contact-verification`: [EmailGuard, free](https://datacircle.dev/validate-email-apis/emailguard/free/llms.txt)

## EmailGuard's APIs (1)

- [EmailGuard: email verification API pricing, 5 plans](https://datacircle.dev/validate-email-apis/emailguard/free/llms.txt)

## EmailGuard: email verification API alternatives

- [Qualisend, $199 pack, Pay as you go, 50,000 credits, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/199-pack-pay-as-you-go-50000-credits-post-verify-bulk/llms.txt): $3.98 per 1,000, 50% complete, live
- [Anymail Finder, $199 monthly](https://datacircle.dev/validate-email-apis/anymail-finder/199-monthly/llms.txt): $3.98 per 1,000, 17% complete, live
- [Mailrook, $199 monthly, Scale, GET /v1/validate/{email}, Validate a single email, full](https://datacircle.dev/validate-email-apis/mailrook/199-monthly-scale-get-v1-validate-email-validate-a-single-email-full/llms.txt): $3.98 per 1,000, 67% complete, live
- [SafetyMails, $39.80 monthly](https://datacircle.dev/validate-email-apis/safetymails/39-80-monthly/llms.txt): $3.98 per 1,000, 33% 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 2026-11-07.

- https://app.emailguard.io/api/reference?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://app.emailguard.io/api/reference.openapi?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://emailguard.io/developers?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://emailguard.io/emailguard-terms-of-service-v3.pdf?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://emailguard.io/features/contact-verification?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://emailguard.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing