Heidi Secures $340M to Transition from Clinical Documentation to Supervised Agentic Execution

What You Should Know

Global clinical AI platform Heidi raises $340M in total new capital, comprising a $100M Series C equity round at a $900M valuation and a $240M growth investment from General Catalyst’s Customer Value Fund (CVF).The Series C equity financing was led by long-term investor Blackbird, with continued participation from Phoenix Court (LocalGlobe, Latitude, and Solar funds), Point72 Private Investments, and Headline, bringing Heidi’s cumulative funding to $436.6M.The $240M CVF growth capital structure provides dedicated go-to-market and balance-sheet capacity to fuel enterprise expansion while allowing equity capital to focus directly on proprietary R&D, clinical safety infrastructure, and regulatory submissions.Expands beyond ambient transcription into supervised agentic workflows; the suite includes Heidi Evidence (context-aware point-of-care clinical research, answering over 10 million queries since March 2026), Remote (a proprietary clinical wearable microphone), and Dictate (voice-to-text).

Operational Traction, Scale, and Financial Velocity

Founded in Melbourne, Australia, by physician-technologist Dr. Thomas Kelly, Heidi has demonstrated rapid commercial expansion across global public and private health systems:

Encounter Volume & Clinical Reach: The platform now supports 2.8 million patient visits per week across 190 countries and 110 languages. In aggregate, Heidi has supported more than 175 million patient visits (up from 73 million at its Series B) and 67 million clinical hours, more than tripling usage since September 2025.ARR Acceleration: Annual recurring revenue (ARR) grew fiftyfold from $1M to $50M by April 2026 within 24 months.Enterprise Adoption & Flagship Contracts: Heidi maintains an enterprise activation rate of approximately 62%. Key institutional accounts include:United States: Massachusetts-based integrated delivery network Beth Israel Lahey Health.United Kingdom: Selected as the sole supplier for NHS England Midlands—the largest clinical AI procurement in NHS history.Australia & New Zealand: Enterprise deployments across The Royal Children’s Hospital Melbourne, Children’s Health Queensland, Metro South Health, and a nationwide implementation across every emergency department in New Zealand.

Platform Expansion: From Scribes to Supervised Action

Heidi is expanding its software and hardware product surface beyond the visit consultation to capture the full clinical workday:

In-House Model Architecture: Unlike competitors that wrap commercial frontier models via third-party APIs, Heidi runs the vast majority of its transcription, medical entity extraction, and clinical note generation on proprietary in-house models. This architecture allows the platform to optimize compute latency, lower inferencing costs, and tailor models specifically to clinical tasks.Heidi Evidence (Point-of-Care Intelligence): Launched in March 2026, Evidence surfaces context-aware clinical practice guidelines and medical literature at the point of care, having answered over 10 million clinical queries to date.Hardware & Modality Diversification: Introduced Remote, a purpose-built wearable audio-capture device for sterile surgical environments and ambulatory exam rooms, alongside Dictate, an integrated voice-to-text dictation tool.Supervised Agentic Workflows: New capital will accelerate autonomous agents that navigate multi-step clinical tasks—such as prepopulating order sets, referral drafting, and pre-encounter record synthesis—with the supervising clinician retaining final review and sign-off. (Note: These upcoming agentic capabilities will initially exclude the UK and EU markets due to regional regulatory pathways).

Enterprise Compliance and Safety Standards

To support deployments across enterprise delivery systems and public health services, Heidi complies with global regulatory and data privacy frameworks, including HIPAA (U.S.), GDPR (EU), NHS information governance standards (UK), and the Australian Privacy Principles. The platform holds ISO 27001, SOC 2 Type II, Cyber Essentials Plus, and the newly established ISO 42001 certification for Artificial Intelligence Management Systems.

“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 Dr. Thomas Kelly, Co-founder and CEO of Heidi. “That’s the shift we’re now making: from documenting care to helping clinicians act on it. This round is about getting an AI Care Partner to every doctor in the world, and putting clinicians back at the center of care with their patients.”