# SEON, $699 monthly: Email verification API

> Our standalone Email API is designed to provide invaluable insights into the digital footprint associated with an email address, such as its email service provider, whether it is disposable, and the number of online profiles found when checking on more than 290 online platforms.

SEON's email verification API on its Starter plan. It returns 3 of the 6 key fields we check: Address, Deliverability, Company.
We haven't run SEON through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
This plan costs $699 a month. 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/seon/699-monthly
- [Email validation API: 160+ providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://seon.io/pricing/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://api.seon.io/SeonRestService/email-api/v3`
- API key: with the plan, on https://seon.io/pricing/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://docs.seon.io/api-reference/email-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: SEON (https://seon.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-02

## In the answer

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

## Price

- Billing: monthly
- $ a month: $699

## Aggregators

- Aggregators: none

## In their words

- Their pitch: Our standalone Email API is designed to provide invaluable insights into the digital footprint associated with an email address, such as its email service provider, whether it is disposable, and the number of online profiles found when checking on more than 290 online platforms.

## Data

- What it checks: format, mail servers, disposable domains, mailbox
- Keep data: no limit
- Use data: Customer may use the Services and their outputs for its internal business operations, including within Customer's own products and services, to screen Customer's own Applicants, transactions, and Users. Customer may not resell the Services or provide any third party with direct access to the Services. [...] Customer may not, and may not cause or permit others to: [...] (ii) perform or disclose any benchmarking, availability or performance testing of the Cloud Services, [...] Customer may not, and may not cause or permit others to: (i) modify, make derivative works of, disassemble, decompile, reverse engineer, reproduce, republish, download, or copy any part of the Services (including any data structures or similar materials produced by the Services), (ii) access or use the Services to build or support, directly or indirectly, any product or service competitive with SEON, or (iii) license, sell, transfer, assign, distribute, outsource, permit timesharing or service bureau use of, commercially exploit, or make the Services available to any third party except as permitted by this Agreement or the applicable Order Form. [...] Customer will use the Cloud Services and their outputs only as a tool to support its own decision-making, within decision processes that operate under Customer's human oversight. [...] Customer may only use the Website and the Services for its internal business operations as permitted by the Agreement, unless otherwise authorized by SEON in writing. Except as permitted by the Agreement, Customer may not distribute any part of the Website or the Services, including but not limited to any data or content featured on the Website, in any medium without SEON's prior written authorization.

## Plan

- Pay: $699
- You get: 2,500 requests a month

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email. Optional: config.timeout, config.priority_timeout, config.priority_sites, config.flags_timeframe_days
- Method: POST
- Path: /SeonRestService/email-api/v3

## About the plan

- Plan: Starter
- Who can get it: businesses only

## The 103 fields the plan's answer can hold

success, ID, email, global network score, deliverable, full inbox, valid format, minimum age months, earliest profile date, email randomness score, catch-all, domain created, custom domain, disposable, DMARC enforced, domain, domain expires, free, domain registered, registered to, registrar name, SPF strict, suspicious TLD, TLD, domain updated, valid MX, website exists, total registrations, business registrations, personal registrations, business technology registered, business technology checked, business science and education registered, business science and education checked, business jobs and employment registered, business jobs and employment checked, business money transfer and remittance registered, business money transfer and remittance checked, personal betting and gaming registered, personal betting and gaming checked, personal dating registered, personal dating checked, personal real estate registered, personal real estate checked, personal email service registered, personal email service checked, personal technology registered, personal technology checked, personal adult sites registered, personal adult sites checked, personal delivery registered, personal delivery checked, personal ecommerce registered, personal ecommerce checked, personal entertainment registered, personal entertainment checked, personal health and fitness registered, personal health and fitness checked, personal social media registered, personal social media checked, personal travel registered, personal travel checked, personal AI platforms registered, personal AI platforms checked, personal messenger registered, personal messenger checked, fraudulent decline first seen, fraudulent decline last seen, fraudulent decline customer hits, fraudulent decline hits, first seen, last seen, customer hits, hits, flags, flag note, flag date, flag industry, breaches, breach name, breach domain, breach date, Have I Been Pwned listed, number of breaches, first breach, last breach, associated domains exist, number of associated domains, associated domains, associated domain name, associated domain create date, associated domain update date, associated domain expiry date, associated domain registrar name, associated domain owner name, associated domain owner company, associated domain owner address, associated domain owner city, associated domain owner state, associated domain owner ZIP code, associated domain owner country code, associated domain owner phone number, first registration date

## SEON's plans (2)

- [SEON, $699 monthly](https://datacircle.dev/validate-email-apis/seon/699-monthly/llms.txt): 50% complete
- [SEON, contact us](https://datacircle.dev/validate-email-apis/seon/contact-us/llms.txt): 50% complete

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

- `POST /SeonRestService/email-api/v3`: [SEON, $699 monthly](https://datacircle.dev/validate-email-apis/seon/699-monthly/llms.txt)

## SEON's APIs (2)

- [SEON: email verification API pricing, 2 plans](https://datacircle.dev/validate-email-apis/seon/699-monthly/llms.txt)
- [SEON: phone validation API pricing, 2 plans](https://datacircle.dev/validate-phone-apis/seon/699-monthly/llms.txt)

## SEON: email verification API alternatives

- [RouterGrowth, $39 monthly](https://datacircle.dev/validate-email-apis/routergrowth/39-monthly/llms.txt): 50% complete, live
- [Disify, $9 monthly, Starter, POST /email](https://datacircle.dev/validate-email-apis/disify/9-monthly-starter-post-email/llms.txt): no limit, 50% complete, stored
- [LeadFuze, $250 monthly, Starter, POST /verification/email](https://datacircle.dev/validate-email-apis/leadfuze/250-monthly-starter-post-verification-email/llms.txt): 50% complete, live
- [NexMailPro, $19 monthly, API, POST /verify/email](https://datacircle.dev/validate-email-apis/nexmailpro/19-monthly-api-post-verify-email/llms.txt): 50% complete, stored
- [Persona, $250 monthly](https://datacircle.dev/validate-email-apis/persona/250-monthly/llms.txt): 33% complete

## 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://docs.seon.io/api-reference/email-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://seon.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://seon.io/legal-and-security/legal/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://seon.io/pricing/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing