The most common Builtio email format is {first}@built.io (e.g. jane@built.io), used in about 93% of observed Builtio work emails. Builtio uses 2 address formats in total.
Most likely format — based on 122 observed addresses
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Builtio email formats
92.6% of observed Builtio addresses use the {first}@ format.
Email formatExampleShare
{first}@built.io
Examplejane@built.io
Share92.6%
{first}.{last}@built.io
Examplejane.doe@built.io
Share7.4%
Derived from 122 real observed addresses · data refreshed 2026-05-30. Role-based inboxes (info@, sales@, …) are excluded from format detection.
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Start with the format that appears most often. For Builtio, that means testing {first}@built.io first, then verifying the exact address before it reaches your CRM or sequencer. A pattern can be common and still produce bad guesses when a person uses a nickname, a middle initial, a regional mailbox, or an older alias.
VeriMails checks syntax, MX records, SMTP behavior, disposable domains, and catch-all detection so you can keep valid addresses and skip risky ones. For larger files, credits start at $19 for 10,000 verifications and never expire. Create a free account, test the pattern on a few addresses, then buy more credits only when you need volume. Run the check again before a large campaign if the list is old, because domains change mail routing and people leave.
The most common Builtio email format is {first}@built.io (for example jane@built.io), used in about 93% of observed Builtio work addresses. Builtio also uses 1 other format for name collisions.
How accurate is this Builtio email format?
This format is derived from 122 real Builtio addresses observed across our data, not guessed. To confirm a specific address, use the live verifier above — it checks deliverability in real time.
How do I find and verify a specific person's Builtio email?
Apply the most common pattern to the person's name (e.g. jane@built.io), then verify it on this page — or use the Find tab to get the likely address from their name automatically.
What other email formats does Builtio use?
Beyond {first}@built.io, observed formats include {first}.{last}@built.io, in descending order of frequency.
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