Datacircle

Proofwire pricing: email verification API

Proofwire's siteThis page as plain textEmail validation API: 200+ verification providers comparedProofwire: email verification API alternatives

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33% complete: 2 of the 6 fields on our checklistSee the 6 fields
$0.00per 1,000 emailsWe haven't run Proofwire through our email verification API benchmark yet.This plan is free. We rank 4,039 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.treg's top-up from $10 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) covers any number of emails. Disify's $9 monthly plan costs less up front than treg's top-up from $10.pingutil, MailTester Ninja and Giggal are the best email verification API providers in the Datacircle benchmark.
Type a number to see the cheapest Proofwire plan for that many emails. The table below then sorts the other plans by what each costs.
Plan: Free Proofwire's only plan
Call: POST /v1/email Proofwire's only call for this API
API: Email verification API one of Proofwire's 5 APIs

About this item

  • Live. Proofwire checks the email when you call the API.
  • 2 of the 6 fields on our checklist. Deliverability, Confidence.
  • Nothing to pay. You get 100 credits once, enough for 100 calls. Calls stop once your credits run out. Credits never expire.
  • One call. You send value to POST /v1/email. You set the Content-Type header to "application/json". You can also send the Idempotency-Key header. The call returns whether the address takes mail.
  • Anyone can get it. Keep data: no limit. Use data: with conditions.

Proofwire: email verification API alternatives

Proofwire alternatives: other email verification API providers by price

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

This planProofwire, freeMailTester Ninja, free, No tokenGiggal, free trial, POST /v1/verify-batchEnrich.so, free, POST /email-validationKaijuVerifier, free, POST /api/v1/jobs, Submit an async bulk job with the SMTP probeMailboxValidator, free, API-FREE
$ per 1,000 emails$0.00$0.00$0.00$0.00$0.00$0.00
Completeness33%50%67%50%50%67%
Billingfreefreefreefreefreefree
Pay$0$0$0$0$0$0
Enough for100 calls, once300 calls a month1,000 results100 calls, once100 results a month300 calls a month
Freshnesslivelivelivelivelivelive
Who can get itanyoneanyone at least 18 years old, or the age of majority in their jurisdictionanyone aged 18 or overanyone 18 or over, on a new account, for an organization, someone with authority to bind itanyoneanyone

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.

  1. proofwire.app
  2. proofwire.app/changelog
  3. proofwire.app/docs
  4. proofwire.app/integrations
  5. proofwire.app/legal/acceptable-use
  6. proofwire.app/legal/privacy
  7. proofwire.app/legal/terms
  8. proofwire.app/mcp
  9. proofwire.app/sdks
  10. proofwire.app/signup

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
  • Name, not in the answer
  • Place, not in the answer
  • Company, not in the answer
Price
$ per 1,000 emails$0.00
Percall
Billingfree
Aggregators
Aggregatorsnone
Charges
Also pays forfrom the same budget: Email Find · Phone Verify · IP Address Verify · Company Profile
Overage
Units caphard
Not found
$ per 1,000$0.00
Catch-all
$ per 1,000$0.00
In their words
Their pitchSyntax, domain records, live mailbox probe
Data
Freshnesslive
What it checksformat, mail servers, mailbox
Keep datano limit
Use dataChecking whether contact details you already hold are real and reachable: cleaning a list before you send to it, screening a signup form, deciding whether a number is worth dialling, scoring an address at checkout. [...] What it is not for: Discovering contact details you do not have. [...] Validating a list you have no right to hold. [...] Sending to people who have not agreed to hear from you. [...] Calling numbers on a Do Not Call registry. [...] Surveillance or profiling of a specific individual. [...] Reselling the raw results as a data product. [...] Have a lawful basis for the data you send us, use the service within the acceptable use policy, and keep your API keys secret.
Plan
Pay$0
You get100 credits
Enough for100 calls, once
Expiresnever
Rate limit
Batch1
Speed
Answerin the call
The call
You sendvalue, Content-Type header "application/json". Optional: Idempotency-Key header
MethodPOST
Path/v1/email
About the plan
PlanFree
Who can get itanyone
The 7 fields the plan's answer can hold

verdict, confidence, risk, evidence, provider trace, credits charged, suggested correction

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