What is EmailKind used for?

EmailKind is an API that classifies any email address by mailbox provider and type, such as business, personal or disposable, using passive DNS analysis instead of mailbox checks. It is a good fit for separating business signups from free email addresses, filtering disposable addresses at signup and spotting which email provider a lead uses.

Yes. EmailKind has a free plan. Free for 100 requests per month. Paid plans are Starter at $14, Growth at $34 and Scale at $79 per month with higher request quotas; Enterprise is custom.

Is EmailKind open source?

No. EmailKind is proprietary (closed-source) software and can't be self-hosted. In the API Tools category, open-source options include Nango, CodeChat and Hoppscotch.

What are some alternatives to EmailKind?

EmailKind competes with ZeroBounce, NeverBounce and Hunter.

EmailKind: features, pricing and alternatives

About EmailKind

EmailKind is a hosted API that tells you what kind of mailbox sits behind an email address, rather than whether the mailbox exists. A single call to the classify endpoint returns the provider, such as Google Workspace, Microsoft 365 or Zoho, whether the address is business, free or disposable, and a confidence score.

Provider detection covers more than 150 services and separates shared MX providers such as Gmail and Google Workspace. Type classification sorts addresses into business, personal, disposable, education, hosting and self-hosted, and company enrichment resolves custom domains to a company name using SSL certificates, RDAP and website metadata. It relies on passive DNS analysis, so it sends no probes to the mailbox, and the domain database is updated daily.

Official SDKs exist for Python, Node.js and Go, and any HTTP client works with a bearer API key. The site includes a live demo, documentation and a status indicator, and offers a free tier of 100 calls a month with no credit card.

Key features

Mailbox provider detection for 150+ services
Business, personal and disposable classification
Confidence score and boolean flags per result
Company name enrichment from domain data
Passive DNS analysis with no mailbox probing
SDKs for Python, Node.js and Go
Daily-updated domain database

Good fit for

Separating business signups from free email addresses
Filtering disposable addresses at signup
Spotting which email provider a lead uses

Tags: email-classification; api; disposable-email; email-provider; lead-enrichment; developer-tools

EmailKind: questions and answers

What is EmailKind used for?: EmailKind is an API that classifies any email address by mailbox provider and type, such as business, personal or disposable, using passive DNS analysis instead of mailbox checks. It is a good fit for separating business signups from free email addresses, filtering disposable addresses at signup and spotting which email provider a lead uses.
Is EmailKind free?: Yes. EmailKind has a free plan. Free for 100 requests per month. Paid plans are Starter at $14, Growth at $34 and Scale at $79 per month with higher request quotas; Enterprise is custom.
Is EmailKind open source?: No. EmailKind is proprietary (closed-source) software and can't be self-hosted. In the API Tools category, open-source options include Nango, CodeChat and Hoppscotch.
What are some alternatives to EmailKind?: EmailKind competes with ZeroBounce, NeverBounce and Hunter.