Heidi hits $1.26bn after $140m Series C, 12 months from Series B
Heidi, the Melbourne clinical notes AI that won Scaleup of the Year at Startup Daily's Best in Tech Awards, closed a US$100m (A$140m) Series C led by Blackbird. The round values the company at A$1.26bn, up from $703m at its Series B in October 2025.
That is an 80% valuation jump in 12 months. General Catalyst also led a separate US$240m growth investment.
Heidi launched in February 2024 and now processes 2.8 million clinical notes per week across 190 countries. The product records patient consultations and generates clinical documentation. Strong adoption in the US, UK, Canada, and Australia.
What this means for sales teams:
Series C rounds this size typically mean aggressive hiring. Heidi went from $5m seed (2021) to $10m Series A (2023) to $98m Series B (October 2025) to $140m Series C now. That trajectory suggests significant commercial team expansion coming.
The $335m growth capital is earmarked for sales and expansion. Translation: new territories, bigger quotas, more AEs. When a company doubles valuation in 12 months and raises growth capital, they are staffing up the commercial org.
For sales professionals evaluating Series C equity: Heidi is post-product-market fit with real usage data (2.8m notes/week, 20m patient interactions). That is traction. Series C equity is typically lower percentage than Series A or B, but the valuation is real and the exit path is clearer.
Worth noting: Heidi has now raised five rounds in under four years. Fast capital cycles mean fast growth expectations. That usually translates to aggressive quotas and rapid territory changes. The upside is clear, the ramp expectations will be steep.
Blackbird backed the seed round and came back for Series C. Repeat lead investors signal confidence, but also mean existing shareholders dilute less, which affects equity value for later hires.
Series C context:
Most Series C companies are past the "will this work" phase and into "how fast can we scale." Failure rates drop significantly post-Series B (roughly 70% of Series C companies reach exit or sustainability vs. 90%+ failure at seed). Heidi's usage numbers and repeat revenue suggest they are in the scale phase.
For anyone evaluating a Series C sales role: ask about quota, territory definition, and how the growth capital changes your patch. $335m does not sit in a bank account, it gets deployed. Make sure you know where.