Digital Castle Pty Ltd is a web company dedicated to improving the way in which people engage with the property market. The company has developed a series of websites specifically designed to engage and empower consumers with ratings and reviews, property data, statistics and experience. With a team comprising property and technology industry leaders, Digital Castle Pty Ltd is producing the most innovative and unique web-based property market resources available.


Ratemyagent.com.au is an online platform that lists every real estate agent in Australia together with their sales results, statistics, rankings and reviews, so vendors can find the best agent to sell their property.

Coming soon...


Mark Armstrong

CEO & Co-Founder

With 20 years experience in the areas of property advisory, tax, negotiation, property development and business leadership, Mark's knowledge of the property industry in Australia and abroad is extensive. He is a Certified Practising Account (CPA) and Licensed Real Estate Agent.

Xavier Perronnet

CPO & Co-Founder

Xavier has an extensive background in property investment and portfolio advisory, buyer/vendor advocacy, property valuation, web strategy and product delivery. He is a Director of Digital Castle and heads up product strategy and implementation for the company. Xavier holds degrees in Business, Applied Science and Music.

Ed van Roosendaal

CTO & Co-Founder

Ed is a highly skilled IT professional with over 10 years experience working on large scale enterprise solutions. He heads up the technical team at Digital Castle Pty Ltd, overseeing all software architecture, development, delivery and maintenance for the company. Ed loves all things agile and is committed to remaining at the cutting edge of digital technology.

David Williams


More than 30 years’ experience in Investment Banking. Managing Director of Kidder Williams. Prior to this he was the Managing Director of the French Bank SG Hambros, Head of M&A at ANZ McCaughan and Head of M&A at Arthur Andersen. David has a Masters degree and is an investor in Digital Castle.