Having developed its own technology, including an enforcement tracker, data breach app and data law navigator, CMS is well positioned to advise on the full range of data protection matters. The team advises on GDPR and cyber security, as well as on the benefits and risks of AI developments. With an ever-growing roster of multinational companies, the practice is becoming renowned for its international capabilities in this space. Dóra Petrányi heads the team with ‘tremendous leadership‘, bringing experience in the TMT sector across Hungary and the CEE region to the group. Márton Domokos is an ‘asset to the firm‘ and focuses on data protection, IP matters and commercial transactions in the TMT sector. Anna Zsófia Horváth assists clients with EU policies relating to data protection and IT, while Katalin Horváth contributes unique fintech experience. Gábor Bertók bolsters the team’s dispute resolution offering, with extensive experience in data protection and IP litigation.

GDPR matters are a key strength of the data protection team at Dentons. As well as advising on data protection audits and representing clients before the data protection authorities, the practice advises on related issues, such as portfolio management, software and e-commerce matters. The group has a wealth of international experience, which it utilises to advise clients on cross-border data transfers, and an extensive client list across a range of sectors, with a particular focus on IT and telecoms clients. Áron Károlyi-Szabó also strengthens the team’s global reach, advising on data protection and privacy matters and relevant EU law. Since publication, former practice head Tímea Bana departed the practice (in October 2024).

Hegymegi-Barakonyi and Fehérváry Baker&McKenzie Attorneys-at-Law’s data protection team has an established global network, advising international clients across the pharmaceuticals, automotive, energy and technology industries on Hungarian and EU data protection laws. The practice covers the full scope of relevant matters, from privacy policy and GDPR compliance, to online marketplaces and cybersecurity. The team also handles internal investigations, from data breaches to fraud detection, as well as providing representation before the Hungarian Data Protection Authority. Practice head Csaba Vári is well versed in a variety of cross-border data protection matters, including data transfers. András Gaál advises both Hungarian and international companies on the implementation and application of novel technologies.

Lakatos, Köves and Partners’ data protection practice serves an international client base and has developed a niche advising new entrants to the Hungarian market. The group’s expertise extends beyond data breaches, audits and incidents to encompass advice on marketing campaigns and new product and service development. The team also has a strong track record in relevant dispute resolution. Iván Sólyom leads the team and his knowledge of data protection and GDPR law intersects with corporate, M&A and IP mandates. Alekszej Dubalár has a wealth of experience in IP and data protection litigation, with a particular focus on the energy and utilities sectors.

Kinstellar Andrékó Ferenczi & Társai Ügyvédi Iroda specialises in data privacy matters in the TMT sector, and regularly provides clients with privacy training and advice on data processing. Senior associate Dániel Endre Nagy heads the firm-wide data and cybersecurity teams, as well as the local TMT practice, bringing particular expertise in data protection, privacy and compliance to the firm; he is also the driving force behind the firm’s recently established AI task force. Ákos Nagy boasts almost 20 years’ experience advising telecoms clients on GDPR compliance, marketing and regulatory issues. Anna Szilágyi provides further support, focusing on data protection, IP and TMT law. Since publication, Tímea Bana joined the team from Dentons (in October 2024) to head up the TMT practice.

In tandem with IT risk and AI specialists, Deloitte Legal Göndöcz and Partners Law Firm’s privacy, technology and IP practice continues to expand its digitalisation and AI offering. The team is noted for being ‘on the edge of legal developments‘ and boasts several niche areas of expertise, such as electronic signatures. Practice head Dániel Attila Nagy is actively involved in Hungarian and cross-border data privacy and GDPR compliance projects. Nagy, who was promoted to managing associate in November 2022, has particular knowledge of the e-privacy and e-commerce sectors and advises on digital regulatory matters and technology-focused M&As. Lili Albert is well versed in AI regulation, while Flóra Szalai is singled out for her technology expertise.

KPMG Legal Tóásó Law Firm fields a wealth of data protection expertise and its own privacy management framework, producing GAP analysis and action plans. A recent increase in mandates from notable names in the fintech and software industries has seen the group continue to expand its diverse clientele. As well as data protection implementation projects, the team regularly handles data protection litigation, representing clients before the Hungarian Data Protection Authority. Fanni Márkus, co-head of the data, digital and technology team, is an expert in data protection, privacy and cybersecurity issues. Márkus' counterpart Nora Takacs focuses on data protection due diligence and GDPR compliance projects.

With an ‘exceptional‘ scope of knowledge spanning both EU and Hungarian data protection law, Siegler Bird & Bird Ügyvédi Iroda offers privacy advice on a multi-jurisdictional basis. The ‘outstanding’ data protection team’s international clientele spans various industries, including automotive, healthcare and pharmaceutical. The group handles data breaches and proceedings before the Hungarian Data Protection Authority, as well as assisting with GDPR audits and compliance projects. Bálint Halász leads the team, supported by Ádám Simon, who specialises in data protection and commercial matters in the TMT sector, and Zoltán Tarján, who has expertise in employment-related privacy issues and direct marketing matters.

Taylor Wessing Hungary’s data protection and data privacy team operates on an international level. The practice fields extensive knowledge of data protection regulations and GDPR compliance in Hungary and the EU, and regularly participates in cross-border data transfers. The team boasts a recently established US-EU division, dedicated to advising US-based clients on privacy matters. Often at the forefront of sector developments, the group advises clients on emerging technologies and privacy issues related to AI and the life sciences industry. Practice head Dániel Ódor specialises in the full spectrum of data protection matters and leads the team in its advice on data breaches, data management and privacy policies. János Kopasz is another active member of the team, who ‘comes up with innovative solutions to challenging situations‘.

The expertise of the data privacy and protection team at VJT & Partners ranges from GDPR audits to representation before the Hungarian Data Protection Authority. Established data protection and privacy expert János Tamás Varga co-heads the team alongside Endre Várady, who is involved in the development of GDPR compliance software. Andrea Belényi has over a decade of experience in both regulatory and compliance matters, and heads the firm’s data protection officer training programme.

Mónika Horváth co-leads the IP and technology team at DLA Piper Posztl, Nemescsói, Györfi-Tóth and Partners Law Firm alongside Zoltán Kozma, who advises public and private sector TMT clients on freedom of information, consumer protection and compliance issues. Márk Almásy has particular expertise in the life sciences sector, advising international companies on the privacy aspects of health data, medical products and devices. Fanny Horváth advises multinational companies on data protection compliance matters.

Noerr advises multinational clients across the spectrum of data protection and privacy matters, from representation in contentious proceedings to the preparation of internal documentation and data processing agreements. The team is co-led by Edina Czeglédy and Emese Julia Simon; the former has over 14 years’ experience in handling data breaches and cross-border data transfers, while the latter takes a lead role in data protection assessments and audits.

Oppenheim Ugyvedi Iroda fields a ‘well-rounded’ data protection team, which is increasingly advising on AI-based solutions. As well as risk assessments and GDPR compliance projects, the team is involved in litigation related to data protection matters. ‘Highly knowledgable specialist‘ Ivan Bartal leads the team, with over 23 years of experience advising both local and global clients on IP, IT and data protection matters. Bartal also has particular expertise in e-commerce and software development issues.

Boutique firm PROVARIS Varga & Partners specialises in technology, data privacy and IP matters, with a strong track record in the health and manufacturing sectors. Practice co-head Ádám Liber regularly represents clients before the Data Protection Authority, as well as advising more generally on Hungarian and EU data privacy law. Tamás Bereczki co-leads the data protection and privacy team, specialising in risk and cybersecurity management, privacy frameworks and cloud services. Zsombor Orbán joined in April 2023 to co-head the practice as part of the leadership trio.

A recent expansion into the sports sector has seen the data protection and privacy team at Réti, Várszegi and Partners PwC Legal increase its data protection officer services. With varied industry expertise, Csilla Judit Dékány leads the team alongside László Szűcs, who focuses on data protection due diligence and compliance reviews. Edvin Pozsonyi counts sports organisations among his clients, as well as public service providers and start-ups. András Csenterics develops AI solutions, while Márta Zsédely advises public and private sector clients on compliance. Zsófia Straubinger handles GDPR projects within the healthcare and pharmaceuticals industries. Márton Farkas is regularly involved in GDPR projects on a cross-border basis.

Krisztián Osztopáni established the data protection and privacy practice at SBGK in 2018, and heads up the team along with András György, who takes a lead role in data protection audits. The team prepares internal personal data processing and GDPR compliance policies and has seen an increase in GDPR cases before official bodies; the group regularly represents clients before the Data Protection Authority and various domestic courts.

With a diverse roster of national and international clients, the data protection and privacy team at Schoenherr Hetényi Ügyvédi Iroda covers GDPR compliance projects, data protection audits and the implementation of policies. In addition to his promotion to managing partner of the Hungarian office in April 2023, practice head Dániel Gera brings almost 20 years’ experience to the team, and is noted for advising on privacy issues in the workplace. Dorottya Gindl advises on HR-related data processing, and Aron Hegyi focuses on data security in the workplace.

Katalin Varga heads the data privacy practice at Sándor Szegedi Szent-Ivány Komáromi Eversheds Sutherland, leading the team in its advice on data protection and privacy law. The group’s expertise covers data breaches, audits, mapping and compliance. The practice is regularly involved in GDPR implementation projects on behalf of its extensive international clientele.

Wolf Theiss Faludi Ügyvédi Iroda has extensive experience in data protection and privacy law, which is complemened by its established presence in the TMT, IP and IT sectors. Leveraging the strength of its dedicated GDPR taskforce, the firm regularly assists with the implementation of antitrust and compliance programs. János Tóth co-heads the data protection and privacy team alongside Barnabás Buzási, who also heads up the employment team; the former advises on data management issues, such as data leaks or cyber attacks, while the latter uses his dual expertise to assist with data protection and privacy matters related to employee data.