Australia’s tech sector is experiencing a major moment of reckoning — and healthtech, AI, and software innovators are leading the charge. In Deloitte’s 2025 Tech Fast 50, the top spots were claimed by companies that are not only scaling fast, but also redefining what it means to build technology for global impact.
Heidi Health: A Clinician’s AI Partner That Scaled Like Wildfire
At the top of the list is Heidi Health, a Melbourne-based healthtech company founded by Dr. Thomas Kelly, Waleed Mussa, and Yu Liu. Using AI to automate administrative tasks like documentation, form-filling, and task management, Heidi’s system frees up clinicians to spend more time on patient care.
Since its founding, Heidi has scaled aggressively: the platform now supports more than 2 million consults per week, working in 110 languages across 116 countries. The company’s meteoric growth is reflected in its staggering 15,323% three-year revenue increase, a number that earned it the No. 1 spot on the Tech Fast 50 list.
Other Fast Movers: From Music to Infrastructure
Right behind Heidi is Vinyl Group, a music tech platform that supports creators and musicians. It saw a 2,347% growth rate, showing how technology and media continue to merge in strong and unexpected ways.
Taking the third position is Firmus Technologies, an AI infrastructure player from Tasmania, which registered 2,249% growth over three years. It’s a strong signal that not just software, but physical infrastructure for AI is also becoming a hotbed for innovation.
A New Era of Scale — Led by Resilience
According to Josh Tanchel, Deloitte’s Tech Fast 50 leader, many of this year’s winners “have thrived by creating technology-based services that solve everyday problems, despite global economic shifts.” It’s not just about growth for growth’s sake — companies are proving their business models can sustain scale, cash flow, and long-term value.
Deloitte’s Bec McConnochie echoed this sentiment, noting that these companies “are not just adapting, they are thriving.”
Trends to Watch: Healthtech Gains Momentum, Software Surges
This year’s Fast 50 reveals a few important shifts in the Australian tech ecosystem:
- Healthtech now represents 14% of the Fast 50, up from previous years.
- Software companies make up the largest share of the list at 38%, up significantly from 26% in 2024.
- Fintech remains stable, accounting for 18% of the companies.
These trends suggest a deeper maturation in Australia’s tech landscape: investors, founders, and markets are placing bets not just on new apps, but on deeply technical, high-value platforms and infrastructure.