isBusinessEmail pricing: email verification API, POST /
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- Free (tier 0)Free (tier 0)$0.00 per 1,000
- Contact us, Paid (tier 1)Paid (tier 1)
- Contact us, Paid (tier 2)Paid (tier 2)
- Contact us, Paid (tier 3)Paid (tier 3)
POST / one of isBusinessEmail's 3 callsPOST /Free (tier 0)$0.00 per 1,000v1/ check/ batch POST /Free (tier 0)$0.00 per 1,000v1/ check POST /Free (tier 0)$0.00 per 1,000v1/ verify
About this item
- Freshness. We don't know how fresh this plan's data is.
- 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 call
POST /. You send one ofv1/ check email,domainorurl. You set theContent-Typeheader to "application/json". You can also sendpolicy,deepandworkspace. 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.
| This planisBusinessEmail, free (tier 0), POST /v1/check | MailTester Ninja, free, No token | Enrich.so, free, POST /email-validation | GetProspect, free, POST /v2/email-verifications | Prime Verifier, free, POST /v1/verify/single | FindEmails.com, free | |
|---|---|---|---|---|---|---|
| $ per 1,000 emails | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 |
| Completeness | 67% | 50% | 50% | 50% | 50% | 67% |
| 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 | 100 calls, once | not published |
| Freshness | unknown | live | live | live | unknown | 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 18 or older able to form a binding contract | anyone |
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
| $ per 1,000 emails | $0.00 |
|---|---|
| Per | call |
| Billing | free |
| Aggregators | none |
|---|
| Extra fields | domain age, new domain: +$0.00 |
|---|---|
| Also pays for | from the same budget: Batch checks · Verify that a mailbox exists |
| Units cap | hard |
|---|
| $ per 1,000 | $0.00 |
|---|
| $ per 1,000 | $0.00 |
|---|
| Their pitch | Know if a signup is a work email, and whether their company runs Google Workspace or Microsoft 365. Free API, with the reasons behind every verdict. |
|---|
| What it checks | format, mail servers, disposable domains, role addresses |
|---|---|
| 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. |
| Pay | $0 |
|---|---|
| You get | 100 results a day |
| Enough for | 100 calls a day |
| Per second | 5 |
|---|---|
| Concurrent | 10 |
| Batch | 1 |
| Answer | in the call |
|---|
| You send | one of email, domain or url, Content-Type header "application/json". Optional: policy, deep, workspace |
|---|---|
| Method | POST |
| Path | /v1/check |
| Plan | Free (tier 0) |
|---|---|
| Who can get it | anyone aged 16 or over, with an account |
The 47 fields the plan's answer can hold
email, URL, normalized email, domain, business email, category, confidence, recommendation, policy, free provider, disposable, relay, role account, shared inbox confidence, shared inbox match, group confidence, group match, blocked, lookalike, subaddress, did you mean, has MX record, mail provider, MX records, SPF record, DMARC policy, Google Workspace detected, Google Workspace evidence, Microsoft 365 detected, Microsoft 365 tenant ID, Microsoft 365 tenant region, Microsoft 365 auth, Microsoft 365 identity provider, Microsoft 365 evidence, other suite, workspace pending, mailbox provider, mailbox gateway, mailbox confidence, mailbox evidence, Google Workspace ready, Microsoft 365 ready, reasons, degraded, cached, time taken, request ID