The complete email verification platform for businesses that need accuracy and scale. Verify individual emails, process bulk lists, use flexible API access, and automate list hygiene with ease.
No signup required
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4.2/5 Excellent
Example result
GoogleExample result
GoogleWorks with your favourite tools
Why teams choose Prime Verifier
Boost Deliverability
Higher inbox placement
Eliminate Bounces
Protect sender score
Block Disposables
268,000+ domains detected
GDPR Compliant
Data never stored
Fast Verification
Low-latency processing
Real Catch-All Checks
Probed, not guessed
Pay Per Result
Unknown emails are free
Risk Scoring
0-100 confidence grade
From individual lookups to bulk lists of millions, one platform, complete confidence. Every feature built around the results you care about.
Confirm that an email address can actually receive messages, not just that it looks valid. Catch bad addresses before they damage your campaigns.
Block throwaway and temporary email addresses from entering your list. Updated daily from 268,000+ known disposable domains.
Every email receives an AI-generated risk score based on domain reputation, mailbox patterns, and historical signals. Make smarter send decisions.
Upload your CSV or TXT file, from a few hundred to millions of emails. Download a clean, verified list with quality grades and risk scores.
Thirteen connectors including Mailchimp, HubSpot, Klaviyo, Zoho CRM and Google Sheets. Or use the REST API and webhooks to fit verification into any workflow.
SOC 2-ready infrastructure, IP allowlisting per API key, GDPR compliance, and full audit logs. Built for teams that take data seriously.
No complex setup. No infrastructure to manage. Just accurate results , for any team, any scale.
Paste a single address, upload a CSV list, or connect via our developer API. Works for one email or ten million, your choice.
Every address goes through layered validation, syntax, domain health, mailbox existence, catch-all detection, and risk analysis.
Get your verified list instantly with quality grades (Good · Risky · Bad), risk scores, and actionable flags. Ready to send with confidence.
A clean REST API with predictable JSON, idempotent retries, webhooks, and streaming bulk, built to drop into your signup flow, CRM sync, or data pipeline. No mail-server plumbing, no IP reputation to babysit. That's our job.
REST API
One endpoint, JSON in/out. Verify a single address in well under a second.
Idempotency keys
Safely retry any request, the same key replays the exact result, never double-charged.
Webhooks
Get a callback the moment a bulk job finishes or a balance runs low.
Bulk, async
Push lists from a few hundred to millions, processed in the background at scale.
Streaming (SSE)
Stream results live as each address resolves, or pull a partial CSV anytime.
Pay for answers
Only confirmed mailboxes cost a credit. Catch-all, unknown and error are free.
Full guides, quickstarts & the live API reference at primeverifier.com/docs
curl -H "X-API-KEY: your_key" \
"https://api.primeverifier.com/v1/verify/[email protected]"Response
{
"status": "success",
"data": {
"email": "[email protected]",
"result": "ok",
"resultCode": 1,
"subResult": "ok",
"quality": "good",
"free": false,
"role": false,
"disposable": false,
"catchAll": false,
"didYouMean": null,
"provider": "google",
"antiSpam": false,
"riskScore": 5,
"creditsCharged": 1,
"creditsRemaining": 4999,
"executionMs": 218
}
}Numbers that matter, accuracy, speed, and coverage you can rely on.
Throwaway and temporary-inbox domains on the blocklist, refreshed daily
Half of all checks finish faster than this. Cached lookups return in about 64ms
Processed to date, at a steady rate of well over a million a day
Distinct addresses checked at least once, feeding the shared verdict cache
Thirteen tools connect directly, from email marketing platforms to CRMs, sending services and Google Sheets. Our Zapier app reaches 9,000+ more. Clean a list where it already lives, with no export and no re-import.
One simple credit. Buy once, or save with a monthly plan, no hidden fees, no monthly minimums.
From $0.00045 per credit at volume
Practical guides on email deliverability, list hygiene, and sending best practices , written by the team that lives this every day.
Stop exporting CSVs to verify your list. Connect Mailchimp, Klaviyo, HubSpot, MailerLite, Brevo, ActiveCampaign, Zoho CRM, SendGrid, Mailgun, Mailjet, Campaign Monitor, SparkPost or Google Sheets, and the results land straight on your contacts.
The cheapest bad address is the one you never accepted. Put email verification inside the Zaps you already run, between your form and your CRM, with the branch logic that makes each verdict useful.
Most 'best verifier' lists are ranked by affiliate payout. This one tells you which tool actually fits you, with a straight read on accuracy, catch-all handling, and price.
The questions people ask most about verifying email addresses.
Email verification checks whether an address can actually receive mail before you send to it. Prime Verifier runs four checks in under a second: syntax, the domain's MX (mail-server) records, a live SMTP check that asks the mail server whether the mailbox exists without ever sending a message, and a catch-all probe for domains that accept everything.
Prime Verifier verifies at around 99.6% accuracy. Accuracy is highest on Gmail, Outlook, and Yahoo. The hard cases are catch-all domains, which we actively probe rather than guess, and we are honest when a mailbox genuinely cannot be confirmed instead of labelling it valid.
A catch-all domain accepts mail to any address, even ones that do not exist, so a single check cannot prove one specific mailbox is real. Prime Verifier probes a real and a fake address in the same session to produce a usable signal, instead of just labelling the whole domain risky.
No. The check is silent. We talk to the receiving mail server the way a sending server would, up to the point of asking whether the mailbox exists, then stop before any message is delivered. The person being checked never receives an email.
Yes. You can verify an address on the site with no account, and signing up gives you 100 free verifications with no credit card. After that you buy a single credit type, pay once as you go or save with a monthly plan, and credits never expire.
Both. Upload a CSV or Excel file to clean an entire list (we remove duplicates and hand back a graded file), or call the REST API to verify addresses in real time at signup, checkout, or inside your data pipeline.
Verify any email, clean your list, and protect your sender reputation. Free to start, no credit card, no commitment.