Build a Contact List From Any Company Domain.

Start from a company's domain, not a purchased database. Enter the domain into the builder above and Verifox surfaces everyone who works there, then verifies each work email before it joins your list. Do it for one company at a time here, or hand a CSV of names and companies to the bulk email finder and build the whole list in one pass.

Yes, for business contacts and legitimate B2B outreach. GDPR's legitimate-interest basis covers finding a work address to send a relevant business proposal, provided you identify yourself and honour opt-outs, which is also the core of CAN-SPAM. Verifox is GDPR compliant, and the addresses on your list are used only to run your lookups and show you the results. We never sell them.

Because a bought list is someone else's stale data. Addresses decay as people change jobs, so a purchased file arrives pre-loaded with bounces that damage your sender reputation, and you cannot prove how it was collected. A list you build is fresh, scoped to prospects you actually chose, and verified at the moment of creation. If you already own an old list, clean it first with the email verifier.

Every candidate runs through the same 9-point verification engine behind our paid API: syntax against RFC 5321/5322, domain and MX records, a live SMTP mailbox ping, disposable-domain and role-address detection, catch-all detection with AI-confidence scoring, domain age, and SPF/DKIM/DMARC authentication. Invalid, risky, and catch-all addresses are flagged before they join your list, so a contact on it is a contact you can send to.

Free to start, yes. Run lookups from this page without an account, then create a free account to claim 1,000 free credits, or 2,500 if you sign up with a work address. No card required. Searching a company domain for its team costs 100 credits, and revealing one person's email costs 50, with no charge if we can't find one. A find from a name and domain costs ten credits, credits never expire, and volume discounts are on the pricing page.

Yes. Hand the bulk email finder a CSV of names and companies and Verifox returns a clean file with the found address, the matched pattern, a confidence score, and a verification verdict on every row. The single-company search on this page is the quick way to try it; that tool handles the whole upload-to-export flow.

We score them instead of guessing. Catch-all domains accept mail for any address, so a plain SMTP check cannot confirm the mailbox, and 20-40% of B2B email lists fail at exactly this point, the check most free tools skip. Verifox flags the catch-all and runs an AI-confidence pass, so each of those contacts carries a 0 to 100 score you can threshold before sending. The catch-all checker digs into single domains.

Yes. Every list exports as CSV with all data fields intact, ready for HubSpot, Salesforce, Apollo, Clay, or any sequencer that imports a file. To skip the file step entirely, the REST API exposes the same find-and-verify endpoints for your own pipeline, and the native MCP server lets AI agents build and verify contact rows without glue code.

An extractor scrapes whatever addresses happen to sit on a page, so you inherit dead mailboxes, role addresses, and zero context about who each contact is. The builder works the other way around: you pick the company, Verifox surfaces the team behind its domain and verifies each address. Scraping has its place, the domain email extractor covers it, but a deliberate, verified list is what keeps bounce rates low. For B2B prospecting from profiles, the LinkedIn email finder uses the same engine.

Each address the builder surfaces is verified before you see it, so timing depends on how quickly the company's mail server answers. Bulk lists process in parallel rather than row by row. Custom SLAs are available on annual Volume contracts, with live status at status.verifox.ai.