5 free lookups. No credit card required.
The most common Customer.io email format is [first].[last] (ex. jane.doe@customer.io), which is being used by 47.6% of Customer.io work email addresses. Other common Customer.io email patterns are [first] (ex. jane@customer.io) and [last] (ex. doe@customer.io). In all, Customer.io uses 8 work email formats.
| Email Format | Example | Percentage |
|---|---|---|
| [first].[last] | jane.doe@customer.io |
47.6%
|
| [first] | jane@customer.io |
42.2%
|
| [last] | doe@customer.io |
7.1%
|
| [first][last_initial] | janed@customer.io |
1.5%
|
| [first].[last_initial] | jane.d@customer.io |
0.9%
|
| [first][last] | janedoe@customer.io |
0.3%
|
| [first_initial][last] | jdoe@customer.io |
0.3%
|
| [first]_[last] | jane_doe@customer.io |
0.1%
|