Symptomate is an AI-based system that checks symptoms, identifies causes, and provides recommendations on what to do next. It was created by doctors who conducted clinical tests on patients themselves. It works quickly, for free, and anonymously. The assessment takes 3 minutes. It is available as a browser-based website and smartphone application.

Ubie AI Symptom Checker is a web service from a Japanese startup. It also diagnoses based on described symptoms. According to the company, the application is used by more than 3 million people every month. It already knows over 1000 diseases. Answers are generated based on its database of 50,000 medical documents. It cannot replace a doctor, but it can recognize potential danger.

Ada is another free symptom-checking service, but in the form of an iOS application. You answer simple questions about your or someone else’s health and symptoms. AI Ada evaluates your answers according to a medical dictionary containing thousands of diseases. Then you receive an individual report on the assessment, indicating what may be wrong and what to do next. Everything is confidential.

Babylon Health is a chatbot from a British company of the same name. Initially, it provided online consultations with doctors, but it decided to release a digital service that uses AI to help diagnose. The platform operates based on medical knowledge accumulated by humans. Machines are not yet trusted to do the work of building logical relationships. But machine learning is used to improve the system.

WebMD is a health companion application that uses AI to provide personalized advice. It uses natural language processing to understand user symptoms and provide individual health advice, such as disease treatment advice and lifestyle recommendations.

Glass AI is a knowledge system that generates diagnoses or clinical plans based on the presented diagnostic problem. Designed for doctors and healthcare professionals.

By the way, symptom checkers even exist for animals. The Sunrise veterinary clinic has created an application that evaluates symptoms in cats and dogs and gives advice to their owners. It works quickly, clearly, and quite accurately.