Most of what makes American healthcare expensive happens before a doctor is ever in the room, and after. Someone schedules the appointment, confirms the insurance, works out what the patient owes, and chases the payer when a claim stalls. It is slow, fragmented work, and by most estimates it wastes hundreds of billions of dollars a year. Prosper AI has now raised $30mn to put a fleet of AI phone agents on the job.

The Series A was led by Andreessen Horowitz, with Base10 joining and existing backers Emergence Capital, Y Combinator, and Company Ventures returning. Prosper, founded in 2023 by MIT and Harvard alumni Xavier de Gracia and Josep Mingot and based across Madrid and New York, raised a $5mn seed round only last September, which gives a sense of how fast the company says it is moving. Since that round, it claims to have grown revenue fivefold and added more than 40 healthcare organisations as customers.

The pitch is that scheduling was only ever the first step. Where the first wave of healthcare voice AI stopped at booking an appointment, Prosper says its platform answers patient calls, schedules directly inside the electronic health record, verifies insurance benefits, automates billing, and phones insurers when a claim needs more information.