Compare Nautilus Flow and WATI for WhatsApp inbox, Shopify/WooCommerce, Click-to-WhatsApp ads, and Meta vs software billing. Honest fit check—not a scorecard.
Do not pick a WhatsApp tool on “API vs API.” Meta owns the protocol. You are choosing inbox, billing, ecommerce connectors, and whether ads, orders, and agents share a contact record. Nautilus Flow is not nautilusflow.com (a different company).
WATI’s product changes independently of this site. Verify pricing, BSP versus Cloud API, and app-store listings on their site before you rip out a live number.
See Shopify, Click-to-WhatsApp inbox, Features, and the guides.