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UniOne pricing: email verification API

UniOne's sitellms.txtBest email verification API in 2026: providers comparedUniOne: email verification API alternatives

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50% complete: 3 of the 6 key fields we checkSee the 6 fields
$0.00per 1,000 emailsWe rank 3,214 plans by price. treg's top-up from $10 costs the least 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.MailTester Ninja, Signaliz and Enrich.so are the best email verification API providers in our benchmark.
Plan: Free one of UniOne's 23 plans
Call: POST /email-validation/single.json UniOne's only call
API: Email verification API UniOne's only API

About this item

  • Live. UniOne checks the email when you call the API.
  • 3 of the 6 key fields we check. Address, Deliverability, Company.
  • Nothing to pay. You get 5 requests a month.
  • One call. You send email to POST /email-validation/single.json. The call returns whether the address takes mail.
  • Who can get it: with conditions. Keep data: no limit. Use data: with conditions.

UniOne: email verification API alternatives

UniOne alternatives: every email verification API provider ranked

The table starts with UniOne's cheapest paid plan. Next come plans from other providers with the price per 1,000 emails closest to UniOne's. Each plan in the table gives live data.

UniOne, $4 monthly, StartUp 6K, 6,000 emails a month, from the 101st validation a monthVerifyAnyEmail, $20 pack, 10,000 credits, POST /v1/verifyVerimail, $20 packMillionPhones, $60 monthlyVerifly, $10 pack, Starter, POST /verify/bulkSilverLining, pay as you go
$ per 1,000 emails$2.00$2.00$2.00$2.00$2.00$2.00
Completeness50%67%50%33%33%33%
Billingmonthlypay firstpay firstmonthlypay firstpay as you go
Pay$4$20$20$60$10monthly
Enough foras many as you pay for10,000 calls10,000 calls30,000 calls a month5,000 resultsas many as you pay for
Freshnesslivelivelivelivelivelive
Who can get itanyone, a company or a person 18 or older, using the service for commercial purposesanyone at least 18 years old, or the age of majority in their jurisdictionbusinesses and professionals, not directed at anyone under 18anyone with a work emailanyoneanyone with an AWS account

Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-03.

  1. docs.unione.io/en/mcp
  2. docs.unione.io/en/web-api-ref
  3. docs.unione.io/llms-full.txt
  4. unione.io/en/email-validation/
  5. unione.io/en/pricing/
  6. unione.io/en/terms
  7. unione.io/pricing.md

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
Price
$ per 1,000 emails$0.00
Percall
Billingfree
Aggregators
Aggregatorsnone
Charges
Also pays foremail-send (100 emails a day)
Not found
$ per 1,000$0.00
In their words
Their pitchAvoid sending emails to non-valid email addresses with UniOne’s email validation API tool. Integrate it easily and take care of your deliverability and sender reputation by checking the validity of email addresses before adding them to your lists.
Data
Freshnesslive
What it checksformat, mail servers, disposable domains, role addresses, mailbox
Keep datano limit
Use dataYou may use the Services for commercial purposes only [...] You may not share API tokens to exceed UniOne's rate limitations. You may not use the UniOne API for spamming purposes.
Plan
Pay$0
You get5 requests a month
Enough for5 calls a month
Rate limit
Concurrent2
Batch1
Speed
Answerin the call
The call
You sendemail
MethodPOST
Path/email-validation/single.json
About the plan
PlanFree
Who can get itanyone, a company or a person 18 or older, using the service for commercial purposes, needs no credit card
The 11 fields the plan's answer can hold

status, email address, result, cause, validity, local part, domain, MX found, MX record, did you mean, processed at

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