At the moment, Brush.bio only allows you to collect email addresses and build a mailing list. You can then export the list to your preferred email marketing tool. Two of the most popular email marketing platforms are Mailchimp and Mailerlite.
If you're not ready to sign up for an email marketing tool, you can also use a free Gmail account.
Tip: Not sure whether you need a mailing list? Watch this video to understand why it's an important part of your online marketing strategy.