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SignupScore pricing: email verification API

SignupScore's sitellms.txtEmail validation API: 180+ verification providers comparedSignupScore: email verification API alternatives

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33% complete: 2 of the 6 key fields we checkSee the 6 fields
$0.00per 1,000 emailsIn our email verification API benchmark, the best plan from SignupScore scores 0.0 out of 100. SignupScore ranks 171st of 181 providers.This plan is free. We rank 3,753 plans for email verification APIs by price. Half the plans cost $1.98 per 1,000 emails or less.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.MailTester Ninja, Enrich.so and GetProspect are the best email verification API providers in the Datacircle benchmark.
Plan: Free one of SignupScore's 5 plans
Call: POST /api/v1/check SignupScore's only call
API: Email verification API SignupScore's only API

About this item

  • Stored. SignupScore may answer from SignupScore's stored data instead of asking the mail server. SignupScore doesn't say how old the data is.
  • 2 of the 6 key fields we check. Address, Deliverability.
  • Nothing to pay. You get 250 credits a month, enough for 250 calls. Calls stop once your credits run out. Unused credits expire at the monthly reset.
  • One call. You send input to POST /api/v1/check. You can also send check_mx. The call returns whether the address takes mail.
  • Who can get it: anyone 13 or older, one free account per person or organization. Keep data: no limit. Use data: with conditions.

SignupScore: email verification API alternatives

SignupScore alternatives: every email verification API provider ranked

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

SignupScore, $99 monthlyCheck Mail, $99 monthlyElastic Email, $999 monthly, Email API Pro (5,000,000 emails/month), POST /verifications/filesSignaliz, top-upStopReg, $100 monthly
$ per 1,000 emails$0.198$0.198$0.20$0.20$0.20
Completeness33%50%50%33%50%
Billingmonthlymonthlymonthlypay firstmonthly
Pay$99$99$999any amount$100
Enough for500,000 calls a month500,000 calls a month5,000,000 results a monthas many as you pay for500,000 calls a month
Freshnessstoredstoredstoredstoredstored
Who can get itanyone 13 or olderanyoneanyone at least the age of majority in their jurisdiction, with a registered accountanyoneanyone

Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-05.

  1. signupscore.com/
  2. signupscore.com/docs/api/check
  3. signupscore.com/docs/api/errors
  4. signupscore.com/docs/api/signals
  5. signupscore.com/docs/credits-and-limits
  6. signupscore.com/pricing
  7. signupscore.com/terms

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 emails$0.00
Percall
Billingfree
Aggregators
Aggregatorsnone
Charges
Also pays fornothing else
Overage
Units caphard
Not found
$ per 1,000$0.00
Catch-all
$ per 1,000$0.00
In their words
Their pitchCheck an email or domain for disposable providers, missing mail servers, role accounts, typos, and suspicious patterns.
Data
Freshnessstored
What it checksformat, mail servers, disposable domains, role addresses
Keep datano limit
Use dataUse our API and web interface to protect your own signups. Do not use for illegal activities or spam. We may restrict excessive automated usage. [...] You may use our service for personal and commercial purposes. Do not copy or redistribute our detection algorithms.
Plan
Pay$0
You get250 credits a month
Enough for250 calls a month
Expiresat the monthly reset
Rate limit
Per second1
Batch1
Speed
Answerin the call
The call
You sendinput. Optional: check_mx
MethodPOST
Path/api/v1/check
About the plan
PlanFree
Who can get itanyone 13 or older, one free account per person or organization
The 15 fields the plan's answer can hold

request ID, action, primary reason, disposable, public provider, role-based, suspicious, privacy relay, dynamic DNS, MX record, suggested domain, normalized email, mailbox alias, SPF record, DMARC record

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