Ada Health, whose telemedicine app mixes artificial intelligence and human doctors, has seen a surge of users that has investors swooning and ready to bet big on the Berlin-based startup.

Today, Ada Health announced that it has raised $47 million in venture capital in a funding round led by Access Industries, June Fund, and Berlin-based Cumberland VC. In addition, the company said that William Tunstall-Pedoe, an AI entrepreneur who originally helped develop Amazon’s Alexa, also invested in the round.

“The future of health care lies in a much more patient-centric model, where individuals have actionable insights at their fingertips, and doctors and artificial intelligence work together to support patients throughout their health care journey,” said Daniel Nathrath, CEO and cofounder of Ada Health, in a statement. “We’ve seen incredible traction since launch, receiving countless messages each day about how we’ve helped someone identify an important health issue and get to the right next step in their care. This is just the beginning, and we’re excited to enable even more people around the world to effectively manage their health.”

Ada asks users a set of personalized questions and uses their data and stated symptoms to deliver information and suggestions about what their health problem may be. The app launched in 2016, and Ada says 1.5 million people have used the service, to date.

The company intends to use the latest round of funding for product development and to open a U.S. office. It will also continue to hire across all departments, from marketing to engineering.

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