The best free WhatsApp marketing software for small business owners depends on your specific needs and goals. If you're looking for basic functionalities like broadcast messaging, quick replies, and simple customer engagement, you can start with WhatsApp Business App. It's free to use and ideal for small businesses with limited messaging requirements. However, as your business grows, you may need advanced features like automation, customer segmentation, multi-agent support, and integration with CRMs or payment systems. This is where Interakt stands out as the best choice.