isBusinessEmail pricing: email verification API, POST /v1/verify

isBusinessEmail's site llms.txt Email validation API: 180+ verification providers compared isBusinessEmail: email verification API alternatives

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67% complete: 4 of the 6 key fields we checkSee the 6 fields

$0.00per 1,000 emailsWe ran isBusinessEmail in our email verification API benchmark. We didn't score any isBusinessEmail plan.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 (tier 0) one of isBusinessEmail's 4 plans

Call: POST /v1/verify one of isBusinessEmail's 3 calls

API: Email verification API isBusinessEmail's only API

Email verification API

About this item

A copy at most 24 hours old. isBusinessEmail may answer from isBusinessEmail's stored data instead of asking the mail server.
4 of the 6 key fields we check. Address, Deliverability, Confidence, Company.
Nothing to pay. You get 100 results a day, enough for 100 calls. Calls stop once your results run out.
One call. You send email to POST /v1/verify. The call returns whether the address takes mail.
Who can get it: anyone aged 16 or over, with an account. Keep data: no limit. Use data: with conditions.

isBusinessEmail: email verification API alternatives

isBusinessEmail alternatives: every email verification API provider ranked

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

	This planisBusinessEmail, free (tier 0), POST /v1/verify	MailTester Ninja, free, No token	Enrich.so, free, POST /email-validation	GetProspect, free, POST /v2/email-verifications	Sealch, free, POST /api/verify	Generect, free
$ per 1,000 emails	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
Completeness	67%	50%	50%	50%	17%	33%
Billing	free	free	free	free	free	free
Pay	$0	$0	$0	$0	$0	$0
Enough for	100 calls a day	300 calls a month	100 calls, once	100 results a month	200 calls, once	2,000 results, once
Freshness	24 hours	live	live	live	live	live
Who can get it	anyone aged 16 or over, with an account	anyone at least 18 years old, or the age of majority in their jurisdiction	anyone 18 or over, on a new account, for an organization, someone with authority to bind it	anyone 16 or over	anyone	anyone 18 or over with a work email

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.

Product details

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

Address
Deliverability
Confidence
Name, not in the answer
Place, not in the answer
Company

Price
$ per 1,000 emails	$0.00
Per	call
Billing	free

Aggregators
Aggregators	none

Charges
Also pays for	from the same budget: Check an email, domain or website · Batch checks

Overage
Units cap	hard

Not found
$ per 1,000	$0.00

Catch-all
$ per 1,000	$0.00

In their words
Their pitch	does this exact mailbox exist and accept mail? Use it before you send to an address you collected, when cleaning a list, or when a bounce would cost you.

Data
Freshness	24 hours
What it checks	format, mail servers, disposable domains, role addresses, mailbox
Keep data	no limit
Use data	You must not, and must not help anyone else to: resell, sublicense, rent or wrap the API (or its output) as a paid or free product or service whose main value is our data or verdicts, without our written permission, scrape, sweep or bulk-harvest our data, lists or verdicts, including systematically checking domains or addresses to rebuild our dataset, use the Service for spam, list-washing or cleaning lists of addresses you don't have a lawful basis to email, get around limits or protections, including rotating keys, accounts, IP addresses or networks, automating the public checker, or bypassing robot protection, create multiple accounts to evade quotas or suspensions, probe, scan or test the Service's security except as allowed in our security policy, interfere with the Service or other users, or overload our infrastructure, use the Service unlawfully, including in breach of data protection law, or to discriminate unlawfully against people, submit special categories of personal data or anything other than email addresses and domains you're checking.

Plan
Pay	$0
You get	100 results a day
Enough for	100 calls a day

Rate limit
Per day	100
Per second	5
Concurrent	10
Batch	1

Speed
Answer	in the call
Median	0.41 s

The call
You send	email
Method	POST
Path	/v1/verify

About the plan
Plan	Free (tier 0)
Who can get it	anyone aged 16 or over, with an account

The 25 fields the plan's answer can hold

email, normalized email, domain, status, reason, confidence, mailbox status, catch-all, disposable, role account, free provider, category, did you mean, mail provider, has MX record, MX records, SMTP MX host, SMTP stage, SMTP code, SMTP enhanced code, SMTP reply, SMTP used backup MX, cached, time taken, request ID