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Openapi.com pricing and alternatives: email verification API, POST /email-start/{email}

Openapi.com's sitellms.txtBest email verification API in 2026
33% complete: 2 of the 6 key fields we checkSee the 6 fields
$3.376per 1,000 emails€3.00 per 1,000 is $3.376, at the European Central Bank's $1.1253 for €1.Half of the 1,712 plans we rank by price cost $2.632 per 1,000 or less. This plan costs less than 41% of the 1,712 plans.The cheapest plan we rank by price is treg, top-up from $10, at $0.00 per 1,000.
Plan: Single request one of Openapi.com's 16 plans
Call: POST /email-start/{email} one of Openapi.com's 2 calls
API: Email verification API one of Openapi.com's 2 APIs

About this item

  • Live. The call checks the email when you make it.
  • 2 of the 6 key fields we check. Address, Deliverability.
  • A balance you top up. You pay any amount. You spend all of it on calls.
  • One call. You send email to POST /email-start/{email}. You can also send callback. The call returns the answer when the provider is quick. When the provider is slow, the call returns a job. You fetch the answer once the job is done.
  • Who can get it: with conditions. Keep data: no limit. Use data: with conditions.

Openapi.com: email verification API alternatives

We list other providers' plans closest to this plan in price per 1,000 emails. Each plan in the table gives live data.

This planOpenapi.com, top-up, Single request, POST /email-start/{email}Captain Verify, €75 pack, 25,000 Email Verifications, on demand, GET /verifyZeroBounce, $1,699 monthly, ZeroBounce ONE, 500,000 credits a month, POST /v2/validatebatchTrekMail, $17 pack, 5,000 credits, POST /verify/bulk, Create a bulk job (quick)Oppora, $34 monthly, Pro, POST /email/verify, Verify email
$ per 1,000$3.376$3.376$3.398$3.40$3.40
Completeness33%33%83%50%33%
Billingpay firstpay firstmonthlypay firstmonthly
Payany amount€75$1,699$17$34
Enough foras many as you pay for25,000 calls500,000 results a month5,000 results10,000 calls a month
Freshnesslivelivelivelivelive
Who can get itanyone acting in the course of their business, entrepreneurial or professional activitybusiness professionalsanyone, for their internal business purposes only, not a resident of a country the US OFAC sanctions or on its restricted listsanyone at least 18 years of age (or the age of majority in their jurisdiction) and not barred from receiving services under sanctions lawsanyone

Every email verification API provider we score, ranked

Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-25.

  1. console.openapi.com/apis/trust/documentation
  2. console.openapi.com/apis/trust/pricing
  3. legal.openapi.com/terms-and-conditions/term-and-condition-general-en.pdf
  4. openapi.com
  5. openapi.com/faq
  6. openapi.com/pricing

Product details

The key fields this plan's answer can hold, then each filled column in its row on the sheet.

  • Address
  • Deliverability
  • Confidence, not in the answer
  • Name, not in the answer
  • Place, not in the answer
  • Company, not in the answer
Price
$ per 1,000$3.376
Billingpay first
Aggregators
Aggregatorsnone
Charges
Percall
Also pays forfrom the same budget: API Services
In their words
Their pitchThe Email Verification Start service allows you to check the validity and characteristics of an email address in just a few seconds and on a global scale
Data
Freshnesslive
Keep datano limit
Use dataThe data and information provided by Openapi are for the exclusive use of the Customer, who is prohibited from copying, reproducing, assigning to third parties on any grounds and/or using them for purposes other than those expressly established in the Agreement, unless expressly authorised by Openapi and subject to the Customer undertaking to comply with the instructions provided. In particular, to obtain such authorisation, the Customer must provide Openapi with assurances: (i) that it has informed its customers that the data they provide will be transmitted to third parties for the provision of the requested service, (ii) that it has adopted an adequate privacy policy and processes its customers’ data according to security and confidentiality standards no lower than those offered by Openapi’s Privacy Policy, (iii) that it adopts all measures required by applicable law or otherwise suitable to preserve the confidentiality and security of the data provided by its customers. [...] The Customer is also prohibited from: [...] (v) using the APIs and/or the Services for purposes or in a manner that causes damage to Openapi, the Suppliers or third parties and/or violates any provision of law [...]
Plan
Expires12 months after the last top-up
Rate limit
Per second166.67
Batch1
Speed
Answerin the call or by polling
The call
You sendemail. Optional: callback
MethodPOST
Path/email-start/{email}
About the plan
PlanSingle request
Who can get itanyone acting in the course of their business, entrepreneurial or professional activity
The 20 fields the plan's answer can hold

request ID, email, status, SPF valid, DMARC valid, SPF details, DMARC details, free provider, disposable, catch-all, antispam, mailbox full, suggested domain, role address, IP address verification, request state, created at, updated at, message, success

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