
The large and ‘outstanding’ TMT team at CMS handles the full breadth of technology, media, and communications matters with exceptional regional reach. The firm expertly advises on new technologies, including AI, fintech, and digital infrastructure. Veteran in TMT Dóra Petrányi leads the practice, with deep expertise in communications, media, and all types of regulatory matters. Ágnes Sólyom spearheads the growing film financing practice, and is ably supported by Katalin Horváth, who concentrates on financial services, AI, and IT. Eszter Csapó specialises in telecoms and media regulation, Márton Domokos focuses on IT law and data protection, and Péter Homoki provides extensive expertise in communications and cybersecurity regulation.
Legal 500 Editorial commentary
Accolades
Client satisfaction: Sector knowledge
Testimonials
Collated independently by Legal 500 research team.
- ‘Katalin Horváth stands out for her exceptional network within the financial services industry, which significantly enhances the firm’s ability to navigate complex, regulated environments and connect with key stakeholders. Her deep sector insight, combined with a pragmatic and solutions-oriented mindset, brings tangible value to every collaboration.'
- ‘CMS has demonstrated a strong understanding of the financial services domain, which has proven highly valuable in projects involving regulated enterprise clients. Their team combines deep industry knowledge with a pragmatic and business-oriented approach.'
- 'Péter Homoki has extensive expertise in the fields of communications law, IT law, banking law, and cybersecurity. He covers the areas of expertise relevant to telecommunications companies, which is especially useful in this market.’
- 'Eszter Csapó is an excellent media law and IT law expert; she performs high-quality legal work in complex cases. Her knowledge of media law ranks him among the best in the legal market.'
- ‘Dóra Petrányi provides exceptional support for making top management decisions, in coordinating the legal tasks of complex transactions, and in raising and solving strategic aspects.'
- 'Eszter Csapó impresses me with her deep expertise in technology law and her solution-oriented approach; she has a real talent for breaking down complex issues into clear, actionable advice and always goes the extra mile. Péter Homoki is especially strong when it comes to keeping on top of regulatory developments, and what I particularly value is that he understands not just the legal side, but also the technical background — which is hugely important in our field.’
Key clients
- BP Hungarian AI Coalition Kyndryl Holdings, Inc Magyar Telekom Plc. IT Services Hungary Microsoft, Microsoft Ireland Operations Ltd OTP Bank Group, including OTP Bank SimplePay Plc HelloPay Plc RTL Group Samsung Electronics Varonis Vinted
Work highlights
Advised Microsoft on a wide array of technology and commercial matters and their strategic projects for over a decade.
Supported the AI Coalition with its work, including, among other initiatives, the Hungarian implementation of the AI Act.
Acted for RTL Group in a wide array of technology and commercial matters and their strategic projects for over a decade.
Lawyers
Hall of Fame
The lawyers at the very top of the profession, widely known and respected by peers and clients for their longstanding involvement in market-leading work.

Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Leading associates
Leading associates with regular involvement in their team's key work, and recognition from peers or clients as being ones to watch.
Practice head
Dóra Petrányi
Other key lawyers
Katalin Horváth; Ágnes Sólyom; Márton Domokos; Eszter Csapó; Péter Homoki




