CMS is renowned for its well-established and sizeable data protection team, composed of highly experienced and specialised lawyers with strong technical expertise and extensive international reach as well as its ‘deep expertise and pragmatic approach’. The team, led by Dóra Petrányi, a leading data protection lawyer in Hungary, offers a full range of data protection and privacy services. Katalin Horváth, newly promoted to partner, brings expertise in technology, fintech, AI and cybersecurity matters. Márton Domokos coordinates the firm’s CEE data protection practice, focusing on IT, e-commerce, cybersecurity and AI law. Péter Homoki specialises exclusively in IT, data protection and telecommunications law, further strengthening the firm’s capabilities in tackling complex, technology-driven legal challenges.

Hegymegi-Barakonyi and Fehérváry Baker&McKenzie Attorneys-at-Law provide comprehensive support in data privacy, protection regulations, incident response and cybersecurity. Its client base spans multinational clients across sectors such as manufacturing, pharmaceuticals, automotive, energy, banking and construction, the team excels in Hungarian and EU data protection laws, with expertise in GDPR compliance projects and region-wide support. The practice advises on data transfer, outsourcing, and internal policies while representing clients before the Hungarian cybersecurity authority, including on NIS2 directive-related matters. It also handles internal investigations on data breaches, compliance, and employment issues and collaborates with European offices on whistleblowing hotline implementation. Team head Csaba Vári is noted for cross-border regulatory and transactional expertise, while András Gaál specialises in data protection, cybersecurity, IT, and IP supporting clients in adopting innovative technologies within compliance frameworks.

Lakatos, Köves and Partners primarily advise multinational clients on data protection and GDPR matters, offering tailored guidance for market entrants, ongoing business operations, acquisitions and exits. Traditionally active in financial services, energy, and telecoms, the practice has recently attracted major clients in the technology, life sciences and automotive sectors. Key areas of expertise include data protection audits, dispute resolution, incident management, marketing campaigns and product development. Team head Iván Sólyom brings over a decade of experience in data privacy law, providing strategic and practical advice. Zsuzsanna Lukács offers significant expertise in conducting complex data audits, drafting privacy-related policies and agreements, and liaising with Hungarian authorities. Her capabilities extend to data issues in M&A transactions, employment, IT security, e-commerce, and advertising law, enhancing the firm’s versatile offering.

With a strong client base spanning the energy, banking and finance, telecoms and media sectors, Siegler Bird & Bird Ügyvédi Iroda delivers robust expertise in intellectual property, tech, communications, dispute resolution and data protection. Its full-service model ensures seamless collaboration across its corporate, commercial, regulatory, finance and dispute resolution practices, offering comprehensive solutions for clients in Hungary and the broader CEE region. The team is particularly renowned for providing international privacy advice to clients in sectors such as automotive, healthcare, banking, ad-tech and telecoms. Co-head Bálint Halász, with a technical background in computer science, excels in IT, privacy, and contentious data protection matters, while Ádám Simon offers extensive experience in data protection and commercial issues across media, tech and telecoms.

Kinstellar Andrékó Ferenczi & Társai Ügyvédi Iroda’s data protection, tech, media and telecoms team, led by Dániel Endre Nagy, is recognised for its expertise in data protection, privacy, IP, copyright and tech and ‘combining local knowledge with global experience’. Nagy brings extensive experience in GDPR compliance, trade marks, cross-border data transfers and privacy audits, offering comprehensive support to in-house teams and advising on whistleblowing policies and disputes. Ákos Nagy adds significant strength with his deep understanding of the regulatory and commercial aspects of the telecoms sector, regularly advising on GDPR compliance, telecom agreements, network arrangements and financing.

DLA Piper Posztl, Nemescsói, Györfi-Tóth and Partners Law Firm’s data protection and privacy practice operates across tech, media, life sciences and real estate, handling complex, multi-sector matters with extensive global reach. The team advises leading brands on international compliance issues and is deeply involved in shaping data protection law locally and internationally. Integrated with other departments, the team provides full-service support, including expertise in AI development and innovation. Led by Zoltán Kozma, an expert in tech, media and telecoms, the team also features Márk Almásy, skilled in data protection, IP and life sciences privacy issues, and Fanny Horváth, who advises on compliance, civil law and AI-related matters.

KPMG Legal Tóásó Law Firm’s data protection practice supports high-profile multinationals and SMEs across financial, retail, healthcare and manufacturing sectors. Beyond traditional GAP analysis and implementation, the team assists with cutting-edge issues such as software application data flow mapping, data protection due diligence, and whistleblowing regulation compliance. The team also represent clients before the Hungarian Data Protection Authority and in court, leveraging its extensive litigation experience. Co-heads Fanni Márkus and Nora Takacs bring deep expertise in GDPR, digital compliance and sector-specific data protection. Markus focuses on technology and healthcare, advising on biometric and health data, HR policies, and CCTV documentation, while Takacs specialises in GDPR projects and digital services compliance.

Oppenheim Ugyvedi Iroda combines international experience with local expertise, offering cutting-edge advice on evolving topics such as third-country data transfers and AI-based solutions. With a strong regulatory and litigation background, the team has significant experience in regulatory proceedings and data protection litigation, as well as conducting GDPR gap assessments and compliance projects for high-profile clients in sectors such as construction, confectionery and banking. Led by Ivan Bartal, the team excels in e-commerce, copyright, software development, IP/IT transactions and data protection. Bartal has guided global and local companies through GDPR preparation and compliance with local data protection regulations.

The privacy, technology and intellectual property team at PROVARIS Varga & Partners is highly specialised earning a strong reputation for its expertise in the Hungarian market. Renowned for handling complex technology and data privacy issues, the team has a notable track record advising health sector clients on data-related legal matters. Co-heads Tamás Bereczki, Ádám Liber, and Zsombor Orbán bring exceptional credentials. Bereczki offers a unique experience in data protection, cyberlaw, and IT, honed in-house at global banks. Liber advises multinationals on EU data privacy law, outsourcing, and regulatory investigations, while Orban is recognised as a leading expert in digital technology and privacy.

Taylor Wessing Hungary has a strong focus on advising innovative clients in the technology sector, offering full-scale GDPR audits, tailored compliance strategies, and guidance on cross-border data transfers. The team provides proactive advice on the legal implications of emerging technologies and data-driven businesses, serving major international clients to ensure GDPR compliance across the EU. With expertise spanning insurance, health, IP and clinical trials, the team is well-equipped to tackle privacy challenges in AI and life sciences. Led by Dániel Ódor, an expert in GDPR compliance and privacy policies, and supported by János Kopasz, who brings substantial experience in data protection projects, the team delivers comprehensive solutions with extensive international capabilities.

VJT & Partners boasts in-depth expertise in high-profile data protection and privacy matters, with particular strength in GDPR compliance. Advising leading Hungarian and international corporates, the team handles a full spectrum of data protection issues, including privacy in technology and data security, across various industries. The practice is co-headed by János Tamás Varga, a leading figure in Hungarian data protection with over two decades of experience, and Endre Várady, an expert in cross-border privacy matters, outsourcing and IT. Andrea Belényi adds significant value with over a decade of experience in regulatory and compliance-focused data protection advice.

CERHA HEMPEL Dezso & Partners delivers high-level legal services across all aspects of data protection, supported by strong cross-border capabilities and a network of CEE offices offering seamless, one-stop solutions. Co-head Tamàs Polauf provides strategic oversight, while co-head Andrea Presser specialises in drafting notices and agreements for data processors and controllers. Presser’s expertise spans international data transfers, technical measures, intra-group agreements and more, ensuring clients receive tailored, comprehensive advice on complex data protection issues.

CLV Partners - Csabai & Partners Law Firm’s data protection practice, bolstered by strong corporate and employment expertise, serves multinational clients in technology, manufacturing, FMCG and HR services. The team offers business-focused advice and has extensive experience establishing GDPR-compliant whistleblowing policies and investigating harassment and whistleblowing cases with privacy by design. Led by Anna Katalin Papp, who specialises in corporate, commercial, employment and data protection matters, the team delivers tailored solutions to meet complex client needs across diverse industries.

Schoenherr Hetényi Ügyvédi Iroda’s data protection team works closely with other departments and its CEE network, offering comprehensive services including GDPR compliance, audits and internal policy implementation. The team frequently drafts data protection contracts and advises on employee and HR data management, as well as the data aspects of major corporate transactions. Led by Dániel Gera, a seasoned expert with nearly 20 years of experience, the team advises clients across sectors such as construction, energy, financial services, IT, telecom and the automotive industry.

Sándor Szegedi Szent-Ivány Komáromi Eversheds Sutherland’s data privacy practice provides comprehensive advisory services to both multinational and local companies. With extensive experience in GDPR implementation, data breaches, audits, data mapping, and supporting transactions and HR, the team delivers tailored solutions across diverse industries. The team is led by Gergely Dzsinich, a seasoned expert in data privacy. Katalin Varga excels in drafting privacy policies, whistleblowing procedures, and employment-related data protection, the team also represents clients in data breach proceedings before the national data protection authority.

Wolf Theiss Faludi Ügyvédi Iroda's data protection team, integrated within the employment department, combines expertise in HR-related data protection with strong capabilities in IP/IT and corporate compliance. The international team excels in fully implementing GDPR requirements across multiple jurisdictions. Co-head János Tóth advises on a wide range of data management issues, including outsourcing restrictions, data leaks and cyberattacks, with extensive experience consulting with supervisory authorities. Co-head Barnabás Buzási specialises in data protection compliance, cross-border data transfers and employee monitoring, with significant expertise in handling complex CEE-region projects.