MailChimp is a cloud-based email marketing platform that allows businesses to create, send, and track email campaigns. It has a powerful API that enables integration with various third-party applications and services.
Sendinblue is a cloud-based marketing automation and email marketing platform that provides tools to manage contact lists, create email templates, automate email campaigns, and analyze engagement metrics. It offers an API that allows developers to integrate the platform with external applications and web services.