In many parts of the world, WhatsApp is the core operating layer for daily life, where families communicate, businesses run, and increasingly, healthcare is delivered. But WhatsApp wasn’t built for healthcare, and physicians can lose hours navigating disorganized threads. Leona is building the fix: an AI-native operating system for providers, built directly into WhatsApp to bring clarity and clinical structure to patient communication. Since launching its Latin America beta in April, they have expanded organically to thousands of physicians, processing millions of patient interactions across more than a dozen countries. We’re leading Leona’s $14M seed round to build the world’s first AI copilot for doctors. Cofounders @merinsay, Tom Chokel, and Arela Solis bring deep operational and technical expertise, and we’re proud to partner with the team as they redefine how care is delivered across Latin America and beyond.(a16z)