# APITier, free: Email verification API

> Go beyond syntax checks. Verify SMTP reachability, detect disposable and role accounts, score confidence, and surface risk flags — all in one API call.

APITier's Free plan for the email verification API costs $0.00 per 1,000 emails. We check each provider's docs for 6 fields. APITier's docs list 3: Address, Deliverability, Confidence.
We haven't run APITier through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
This plan is free. We rank 4,207 plans for email verification APIs by price. Half the plans cost $2.00 or less per 1,000 emails. [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/apitier/free
- [Email validation API: best verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://www.apitier.com/pricing-plans?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: Docs behind sign-up
- API key: with the plan, on https://www.apitier.com/pricing-plans?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://docs.apitier.com/docs/validate-email-api/single-email-requests?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: APITier (https://www.apitier.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-08

## In the answer

- Completeness: 50%
- Address: ✓
- Deliverability: ✓
- Confidence: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Phone Validation · VAT Number Validation · India Pincode Lookup · QR Code Generation · Barcode Generation · Data Format Conversion · Web Screenshot (Conversion) · Checkout Signals · Address Agent — Validate · Address Agent — Enrich · Business Verify Agent · Lead Agent — Validate · Director Search Agent · KYC Agent — Onboard · Company Lookup · PSC Lookup · Web Scrape · Web to Text

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Go beyond syntax checks. Verify SMTP reachability, detect disposable and role accounts, score confidence, and surface risk flags — all in one API call.

## Data

- Freshness: live
- What it checks: format, mail servers, disposable domains, role addresses, mailbox
- Keep data: no limit
- Use data: You may use the services only in accordance with the documentation, applicable rate limits, plan restrictions, and technical requirements published by APITier. You must not misuse the services, attempt to bypass quotas or authentication controls, probe or scan for vulnerabilities, interfere with service availability, resell the services except as expressly permitted, or use the services in a manner that violates law, infringes rights, or exposes APITier or its suppliers to regulatory or security risk. [...] You must not use service outputs to create, compile, or maintain a separate address, postcode, or geographic database, product, or service that is sold, licensed, distributed, or otherwise made available to any third party.

## Plan

- Pay: $0
- You get: 1,000 credits a month
- Enough for: 500 calls a month

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: Docs behind sign-up

## About the plan

- Plan: Free
- Who can get it: anyone

## The 12 fields the plan's answer can hold

valid, email address, quality rating, confidence score, SMTP validation, SMTP checked, MX validation, disposable validation, role account validation, risk flags, verification depth, free provider

## APITier's plans (5)

- [APITier, free](https://datacircle.dev/validate-email-apis/apitier/free/llms.txt): $0.00 per 1,000, 50% complete, live
- [APITier, $9 monthly](https://datacircle.dev/validate-email-apis/apitier/9-monthly/llms.txt): $1.20 per 1,000, 50% complete, live
- [APITier, $29 monthly](https://datacircle.dev/validate-email-apis/apitier/29-monthly/llms.txt): $1.16 per 1,000, 50% complete, live
- [APITier, $79 monthly](https://datacircle.dev/validate-email-apis/apitier/79-monthly/llms.txt): $1.053 per 1,000, 50% complete, live
- [APITier, $199 monthly](https://datacircle.dev/validate-email-apis/apitier/199-monthly/llms.txt): $0.884 per 1,000, 50% complete, live

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

- Docs behind sign-up: [APITier, free](https://datacircle.dev/validate-email-apis/apitier/free/llms.txt)

## APITier's APIs (4)

- [APITier: business verification API pricing, 5 plans](https://datacircle.dev/business-verification-apis/apitier/free/llms.txt)
- [APITier: email verification API pricing, 5 plans](https://datacircle.dev/validate-email-apis/apitier/free/llms.txt)
- [APITier: phone validation API pricing, 5 plans](https://datacircle.dev/validate-phone-apis/apitier/free/llms.txt)
- [APITier: web scraping API pricing, 5 plans, Web Scrape](https://datacircle.dev/web-scraping-apis/apitier/free-web-scrape/llms.txt)
- [APITier: web scraping API pricing, 5 plans, Web to Text](https://datacircle.dev/web-scraping-apis/apitier/free-web-to-text/llms.txt)

## APITier: email verification API alternatives

- [BetterEnrich, $1,100 monthly, Professional, 50K credits, POST /api/v1/verify-normal-email](https://datacircle.dev/validate-email-apis/betterenrich/1100-monthly-professional-50k-credits-post-api-v1-verify-normal-email/llms.txt): $0.88 per 1,000, 17% complete, live
- [Clearout, $5,280 yearly, Pro 500K Credits, POST /email_verify/instant, Instant Verify](https://datacircle.dev/validate-email-apis/clearout/5280-yearly/llms.txt): $0.88 per 1,000, 50% complete, live
- [EmailMarker, $441 pack, 500,000 credits, GET /api/verify](https://datacircle.dev/validate-email-apis/emailmarker/441-pack-500000-credits-get-api-verify/llms.txt): $0.882 per 1,000, 17% complete, live
- [Proofy, $44.20 monthly, Monthly, 50,000 credits, GET /verify/single](https://datacircle.dev/validate-email-apis/proofy/44-20-monthly-monthly-50000-credits-get-verify-single/llms.txt): $0.884 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 2026-11-08.

- https://docs.apitier.com/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://terms.apitier.com/terms-of-service?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.apitier.com/api-catalogue?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.apitier.com/api-catalogue/validate-email-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.apitier.com/pricing-plans?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing