# ListBuilder automatically syncs your Shopify customers with your Marketing Systems! You will never need to worry about manually uploading and downloading your customers again. Any time a new customer purchases from your Shopify store we sync their information and (if supported by your marketing system) the customer's purchase information. Supported Marketing Systems: * Constant Contact * MailChimp * Sendgrid * Facebook * AWeber * Kaviyo * ... and more coming soon Supported Commerce...