About Keystone Advisory
Strategic insights. Lasting growth.
Who we are
Keystone Advisory is an independent accounting and advisory firm serving internationally active businesses in Türkiye and the MENA region. As part of an integrated global network, we combine local expertise with worldwide resources to help clients optimise profits, enhance business value and internationalise.
Our multidisciplinary teams bring together business advisors, tax specialists and business-services professionals who share one goal: to deliver strategic insights that create lasting value.
What sets us apart
Local depth, global reach
Our teams in Türkiye and the MENA region are backed by a global network, giving you on-the-ground insight with international execution capability.
Partner-led, team-delivered
You work with experienced advisors who take ownership of your relationship, supported by specialists across tax, advisory and business solutions.
Practical and outcome-focused
We translate complex issues into clear, actionable advice that helps you make decisions with confidence and move your business forward.
Countries
We have firms in 120 countries, with a presence in each of the top 40 major business centres throughout the world.
People
We have combined staff of over 56,000.
Offices
We have over 500 offices across the Americas, Europe, Middle East, Africa (EMEA) and Asia Pacific.