Heidi Health nabs $340M to deepen adoption of AI agents within health systems globally

Heidi Health Trading Pty Ltd., a healthcare artificial intelligence startup, today announced it has raised a total of $340 million in new funding to support the company’s next phase of growth and deepen adoption throughout health systems.

The funding comes from a combination of a $100 million Series C round led by Blackbird, with participation from existing investors Phoenix Court, Point72 Private Investments and Headline, and $240 million in growth investment from General Catalyst.

“From the day I started Heidi, the ambition was always bigger than writing doctor’s notes. I imagined that AI would sit alongside clinicians and complete real work under their supervision,” said co-founder and Chief Executive Dr. Thomas Kelly.

Founded in Melbourne, Australia, Heidi is building what it calls an AI Care Partner, designed to expand clinical care capacity for healthcare providers across every stage of care.

Globally, but especially in the United States, AI adoption in healthcare is strong, according to a survey led by the American Medical Association, which noted that 81% of physicians surveyed in 2026 said they were using augmented artificial intelligence. This rate is more than double a poll sent out in 2023.