Email Format Finder

The email format finder analyzes a company domain against our database of 200M+ verified business emails. It identifies which format patterns (first.last@, flast@, firstl@, first_last@, and 30+ others) are used at that organization, then ranks them by likelihood. In our February 2026 benchmark across 1,500 companies, the top-ranked format was correct 87% of the time. This gives you a strong starting point, though we recommend verifying any constructed address before sending.

Pretty accurate for most companies. Our email format finder correctly identifies the primary pattern 87% of the time on the first suggestion, and the correct format appears in the top 3 results 97% of the time. That said, format prediction is not the same as email verification, a correctly formatted address can still bounce if the person has left the company. For confirmed deliverability, use Cleanlist's email verification which checks each address against real mail servers across multiple providers.

The email format finder shows the pattern a company uses, not individual addresses. Once you know the pattern (e.g., first.last@company.com), you can construct a likely address for any employee. For verified individual emails, confirmed via SMTP handshake and cross-referenced across 15+ providers, Cleanlist's People Search delivers triple-verified addresses with 98% accuracy. The format finder is the free starting point; People Search is the verified answer.

Most of the largest tech companies use first.lastname@ as their primary employee email format. In our February 2026 benchmark, Google (first.lastname@google.com), Microsoft (first.lastname@microsoft.com), Apple (firstname.lastname@apple.com), Meta (first.lastname@meta.com), Amazon (first.lastname@amazon.com), and Salesforce (flastname@salesforce.com) all followed first-and-last conventions. Smaller tech companies and startups skew toward firstname@ or flastname@ formats. Enterprise companies in finance and law more often use flastname@ or lastnamef@ patterns. Enter any domain in the tool above to see the specific pattern that company uses, ranked by confidence, without having to guess.

Private companies without a strong online footprint are where most format finders fail. Our tool checks 34 pattern variations against any web traces (employee press releases, conference speaker bios, SEC filings, support page contacts, archived directory listings) plus our verified-email database of 200M+ addresses. If the company has at least a handful of public-facing employees, the format usually surfaces. For genuinely cold private companies with no online employee footprint, the tool returns the patterns most common for a company of that industry and size, typically first.lastname@ or flastname@ as the two most likely starting points. From there, [verify the constructed address](/tools/email-verifier) before sending to confirm it actually reaches the mailbox.