Stop bad emails before they hurt your business.

Verify emails from the jump to avoid dead leads, bounces, and junk signups. No salespeople. No BS.

Email address

How it works

What sets Reckon apart →

Clean app and API

Integrate in a few minutes: Easy-to-parse response with excellent, LLM-friendly documentation.

See Docs →

Integrate in a few minutes: Easy-to-parse response with excellent, LLM-friendly documentation.

See Docs →

🏃🏻‍♂️ Built to be fast

Average full SMTP response:
400-600ms

Average cached response: 40-80ms

💅🏼 Built to be easy

Free sandbox testing

RequestId in every completed response for faster issue tracking

🔒 Built to be secure

Secret and Client-side keys w/ rate limiting built-in

Domain whitelisting

Request

{ "email": "user@example.com" }

Response

{
    "email_address": "user@example.com",
    "status": "valid",
    "status_meta": {
        "valid_format": true,
        "domain_exists": true,
        "accept_all": false,
        "disposable": false,
        "role_based": false,
        "mailbox_full": false,
        "plus_address": false
    },
    "domain_meta": {
        "domain": "example.com",
        "mailbox_provider": "google.com"
    },
    "errors": {},
    "performed_at": "2025-08-28T13:05:18.059Z",
    "performed_in_ms": 409,
    "requestId": "9db43c6d-b178-4263-881f-ee0ebfc2fc08"
}

Built for you

We don't have sales teams, contracts, and 47 features you'll never use. We make email verification that helps you make decisions, with pricing you can predict, and docs you can actually read.

What makes Reckon different →