Datacircle

EmailMarker pricing and alternatives: email verification API, POST /api/upload

EmailMarker's sitellms.txtBest email verification API in 2026
17% complete: 1 of the 6 key fields we checkSee the 6 fields
$0.00per 1,000 emailsThe cheapest of the 1,671 priced plans is treg, top-up from $10, at $0.00 per 1,000.
Plan: Free one of EmailMarker's 10 plans
Call: POST /api/upload one of EmailMarker's 2 calls
API: Email verification API EmailMarker's only API

About this item

  • Live. The call checks the email when you make it.
  • 1 of the 6 key fields we check. Deliverability.
  • Nothing to pay. You get 150 credits once, enough for 150 results.
  • One call. You send filename and file_contents to POST /api/upload. 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.

EmailMarker: 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, like this plan.

This planEmailMarker, free, Free, POST /api/uploadEnrich.so, free, Free, POST /email-validationGetProspect, free, Free, POST /v2/email-verificationsKaijuVerifier, free, Free, POST /api/v1/jobsNeutrino API, free, Free, GET /email-verify
$ per 1,000$0.00$0.00$0.00$0.00$0.00
Completeness17%50%50%50%50%
Billingfreefreefreefreefree
Pay$0$0$0$0$0
Enough for150 results, once100 calls, once100 results a month100 results a monthnot published
Freshnesslivelivelivelivelive
Who can get itindividuals and entities at least 16 years old with the legal capacity to enter into binding agreementsanyone 18 or over, on a new account, for an organization, someone with authority to bind itanyone 16 or overanyoneanyone

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 2026-10-23.

  1. docs.emailmarker.com
  2. emailmarker.com
  3. emailmarker.com/api
  4. emailmarker.com/pricing
  5. emailmarker.com/terms
  6. help.emailmarker.com/en-us/article/list-verification-1djwrqd

Product details

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

  • Address, not in the answer
  • 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$0.00
Billingfree
Aggregators
Aggregatorsnone
Charges
Perresult
Also pays forfrom the same budget: Single Api Verification
Not found
$ per 1,000$0.00
In their words
Their pitchUpload files with up to 1 million emails at once. Get your results via our API or download them directly as a CSV file.
Data
Freshnesslive
Keep datano limit
Use dataa limited, non-exclusive, non-transferable, revocable license to access and use the Services for your own lawful business purposes [...] You agree not to use the Website or the Services for any of the following purposes: Uploading or processing email lists obtained through unlawful means, including lists acquired without the consent of the individuals concerned, Using the Services in connection with unsolicited commercial communications (spam) or any activity that violates applicable anti-spam legislation, Uploading Uploaded Data that contains special categories of personal data as defined under Article 9 of the GDPR [...], Attempting to gain unauthorized access to any part of the Website, the Services, or any systems or networks connected thereto, Using automated tools, bots, or scripts to access or interact with the Services in a manner that places an unreasonable burden on EmailMarker's infrastructure, Reselling, redistributing, or sublicensing the Services or verification results to third parties without the prior written consent of EmailMarker, Using the Services in any manner that could damage, disable, or impair the Website or interfere with any other party's use of the Services, Engaging in any fraudulent activity in connection with the use of the Services, including providing false registration information or using stolen payment credentials
Plan
Pay$0
You get150 credits
Enough for150 results, once
Speed
Answerby polling
The call
You sendfilename, file_contents
MethodPOST
Path/api/upload
About the plan
PlanFree
Who can get itindividuals and entities at least 16 years old with the legal capacity to enter into binding agreements
The 12 fields the plan's answer can hold

success, file ID, file name, lines, lines processed, valid emails, invalid emails, unknown emails, file status, timestamp, valid file, full report file

Best GTM APIs