Third Hemisphere is a founder-led PR Agency Sydney » and global marketing firm helping innovative organisations lead conversations and accelerate growth across APAC and worldwide. With offices in Sydney, Melbourne, Singapore, and an international network spanning Asia, Europe, and the US, we specialise in strategic communications that drive real commercial outcomes. Our team of creative thinkers and doers delivers expertise across branding and design, digital marketing, content marketing, thought leadership, public speaking, media relations, public affairs, and investor relations.

We partner with clients in technology, fintech, sustainability, healthcare, venture capital, AI, climate, and professional services, helping them influence key audiences including investors, customers, talent, partners, and governments. Our work empowers brands to grow faster, stand out, and build industry leadership through bold storytelling and data-driven strategy. Recognised for excellence, Third Hemisphere continues to expand globally while remaining rooted as a leading PR Agency Sydney, committed to creating meaningful, positive impact.