WhatsApp offers two tools for businesses: the WhatsApp Business App and WhatsApp Business API. The WhatsApp Business App is free, easy to set up, and ideal for small to medium-sized businesses. It features business profiles, automated messages, labels, catalogs, and basic messaging statistics. In contrast, the WhatsApp Business API is designed for medium to large businesses, supporting high message volumes, advanced automation, CRM integration, and multi-agent support. It involves costs and requires technical setup. Choosing between the two depends on your business size, customer interaction volume, and need for advanced features and integrations.