User Registration - Klaviyo is a handy WordPress plugin that connects your User Registration forms directly to your Klaviyo email marketing account, making it dead simple to grow and manage your subscriber lists. It's perfect for online store owners, membership site creators, and marketers who want to sync new sign-ups automatically without any manual fuss. With support for custom field mapping and list segmentation, you can make sure the right contacts land in the right Klaviyo lists from day one.