The Email Verification Tool Built on a 9-Check Engine

Yes, for 4 verifications a day right in the widget above. There is no account step, no card field, and no trial countdown quietly running; the allowance simply resets every 24 hours.

When four stops being enough, a free signup loads 1,000 credits onto your balance the moment you confirm, or 2,500 if you register with a work address. Past that, you buy credit packs that never expire, with rates localized to your region.

Every address you paste runs through nine checks at once: RFC 5321/5322 syntax and format, domain existence and MX records, a live SMTP handshake and mailbox ping, catch-all domain detection, AI-confidence scoring on the catch-all hits, a disposable-domain match, role-address detection, domain-age scoring, and SPF, DKIM, and DMARC authentication presence.

The catch-all steps matter most: 20 to 40 % of B2B email lists fail behind catch-all domains, and those are exactly the checks most tools quietly skip. The standalone email verifier and the full email verification service run this identical pipeline.

99.99 % on our 1,000-address benchmark list, catch-all domains included, and that figure is measured on the exact engine this page calls, not a marketing build of it.

There is no “lite” mode hiding behind the free widget. The tool here invokes the same nine-check pipeline our paid email verification service exposes, so the verdict you get for free matches the verdict a Volume customer pays for. The only thing the free tier caps is how many you can run.

Up to your free credit balance, yes. Signing up loads 1,000 verifications (2,500 with a work email), which clears most early-stage lists without spending anything. Upload a CSV and the tool hands back a verdict per row plus a cleaned file you can re-import straight into your sender.

Bigger lists run on credit packs that are pay-as-you-go and never expire, and bulk processing moves at roughly 10,000 emails per minute on the standard tier. Prefer to script it? The API docs cover the batch endpoints.

No. An address lives in memory only for the few hundred milliseconds the checks take, then it is gone. We never log it, never retain it, and never sell it, whether the request came from this tool or the API.

Verifox is SOC 2 Type II audited, and the privacy policy spells out exactly what passes through the pipeline. If your security team wants the full Trust Center report, ask and we will send it over.

Valid means the mailbox answered the SMTP conversation, so send with confidence. Invalid means the address failed a hard check (broken syntax, a dead domain, or a mailbox the server says does not exist) and will bounce; cut those before any campaign goes out.

Risky covers the gray zone: catch-all domains, role addresses like info@, and very young domains. The tool attaches an AI-confidence score to each one so you can pick your own threshold. And when an address comes back invalid, the email finder can often locate a working one at the same company.

In practice, nothing. People say “verify email address” and “validate email address” to mean the same job: confirm an address is real, reachable, and safe to send to. Verifox runs the identical nine-check engine either way.

If you prefer the “validate” phrasing, the free email validator is the same tool under a different name. Both share the same accuracy, the same verification engine, and the same free tier.

The widget locks for 24 hours, then the 4-a-day allowance resets on its own. The same cap applies on our free email checker, so hopping between pages will not buy extra runs.

The faster route is a free account: 1,000 credits the moment you confirm, 2,500 with a work address, still no card. Teams cleaning lists of 10,000+ addresses on a schedule usually graduate to a credit pack from there.

A single verdict lands in about 380 ms at the median, and a repeat lookup served from cache returns in under 50 ms. Bulk jobs stream at roughly 10,000 emails per minute on the standard tier, so a 50,000-row CSV finishes in around five minutes.

The REST API rides the same infrastructure with a 99.9 % uptime SLA on Starter and 99.99 % on an annual Volume contract. Live uptime and incident history sit at status.verifox.ai; rate limits live in the API docs.

Yes. The REST API reference documents the inbound and outbound shapes for every endpoint, so you can drop real-time email verification into signup forms, CRMs, or any tool that speaks REST. HubSpot, Salesforce, Zapier, Klaviyo, Mailchimp, and Brevo all connect out of the box.

Verifox also ships native MCP server support so AI agents (Claude, Cursor, custom LLM apps) can verify addresses without glue code. Drop the MCP URL into your agent config and the tools are wired.