Ada Health

Ada Health is a global health company founded in 2011 by a team of doctors, scientists, and engineers to make personalized healthcare accessible to everyone. The platform features an AI-powered "symptom checker" that helps users understand their health and navigate to the appropriate level of care. Ada's core technology is a sophisticated probabilistic reasoning engine that mimics a doctor's deductive process, analyzing a user’s specific symptoms against a comprehensive medical database of over 3,600 conditions. Originally launched as a tool for doctors called "Ada DX," the company pivoted to a patient-facing app in 2016. The conversation-based interface asks a series of tailored questions, providing an assessment report that includes potential causes and recommended next steps, such as self-care or seeing a specialist. Ada is particularly noted for its high accuracy and its ability to help identify rare diseases. The app has completed over 34 million assessments and is available in multiple languages. By providing a reliable "digital front door" to healthcare, Ada helps reduce the burden on emergency departments and supports better health outcomes through early intervention and informed decision-making.