About usThe Philosophy of Ratio Legal Services

Ratio Legal ServicesThe Ratio Concept

Ratio is the approach of logic, through the research for the cause and the critical thinking. That is why we, at Ratio Legal Services, have created a unique point of reference for providing legal services to our clients. Our academic and professional training, as well as our personal experience in a wide range of branches of Law, our engagement with the daily life of our clients, through the special references of the Greek Law, but also of European and international legal frameworks, ensure our effective contribution to the settlement, resolution, and prevention of both simple and complex legal issues.

Honest Collaboration and Transparency

If there is anything that may be beyond our capabilities, we will let you know from the very beginning. We will be honest with you and we will always make sure to make our costs and fees known to you before, during the provision of our services and after the end of our cooperation. That’s why we have introduced digital tools in our services, so you can always keep track of what we do for you and how much it costs you. Our pricing is always transparent and without surprises, within the deadlines we set together, which are inviolable.

Entrepreneurial Spirit

Guided by the modern legal challenges of the business environment, but also of innovation, we fully meet the needs and perspectives of our clients’ professional business plan, with flexibility in strategy and consistency within the context of modern reality.
We are active advocates of innovation and modern entrepreneurship, which is why we have a comprehensive legal toolkit to safeguard the interests of every new enterprise, both in physical and digital form.


For us, Ratio means innovation. A concept that not only represents the philosophy and activity of our customers, but, at the same time, characterises every aspect of our services.
At Ratio Legal Services, we use innovative digital solutions, in order to provide our customers with complete legal support for the optimal service of their needs, within a crystal-clear frame of services and through the most ideal way.

Contact your specialised Legal Consultant now

Ratio Legal ServicesOUR TEAM

We handle your legal affairs, based on your own unique needs. That is why it is our turn to introduce ourselves.

Lawyer-Legal AdvisorAthanasios-Antonios (Thanos) I. Leontaris

Lawyer and Legal Consultant, with international references and specialisation in Commercial Law, Innovation, Personal Data and Intellectual Property.


Lawyer-Legal AdvisorVasileios Τ. Tzanidis

Lawyer specialised in Sports Law, Tourism & Hospitality Business, and GDPR Consulting.


Lawyer-Legal AdvisorMarianna Τ. Tsiare

Lawyer-Legal Advisor specialized in Civil Law and Data Protection Issues.

Our Services

Comprehensive range of legal services related to real estate.
Effective representation before the Courts and the Judicial Services.
Legal support regarding loans, debt relief and other transactions with Banking Institutions.
Versatile legal support for corporate and commercial issues.
Legal protection of Intellectual Property, Trademarks, Patents and Industrial Designs in Greece and abroad.
Provision of compliance and Data Protection Officer services.
Legal support to start-ups and innovative companies, from idea to unicorn.
Provision of specialised legal services in cases of Debt Collection and Auctions.