Mattos Filho has a robust data protection and cybersecurity practice, known for its specialist expertise in handling both complex contentious and non-contentious matters. With deep sector-specific knowledge spanning banking, insurance, health, and technology, the team advises on major security incidents, regulatory frameworks, data processing, and compliance. Fabio Kujawski is a key contact for data privacy-related transactions, regulatory issues, and contractual matters, while Luiz Felipe Di Sessa advises a wide range of clients, including major corporations and start-ups, on personal data processing and represents them before regulatory bodies. The practice also benefits from the expertise of technology specialist Paulo Brancher and data privacy and cybersecurity expert Thiago Luis Sombra, both of whom play central roles in the team. Supporting the practice are Jaqueline Simas de Oliveira, who handles a mix of advisory and litigation work in data protection; Maíra Schweling Scala Pfaltzgraff, who brings expertise in contractual negotiations and drafting complex agreements; and Isabela Fernandes, who focuses on digital platforms and emerging technologies.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
‘Mattos Filho has an unparalleled customer service culture, in addition to having professionals with great technical knowledge and know-how of market practices.’
‘Luiz Felipe di Sessa and Jaqueline Simas de Oliveira are both technical, have good market knowledge and are available to assist the client.’
‘Mattos Filho is a leading law firm in Brazil, with a solid reputation built over decades of practice. What makes it unique and distinctive in the context of the national legal market is its combination of technical expertise, strategic vision and commitment to excellence in client service. Mattos Filho stands out in the national legal market for the robustness and reliability of its services, which inspires security and trust in its clients.’
‘Paulo Brancher has extensive experience in technology-related matters. Jaqueline Simas de Oliveira served us directly, giving us all the necessary comfort and was always willing to investigate the best path with deliveries of notable excellence.'
- 'Thiago Sombra stands out for being one of the best-prepared lawyers in the market. He is ethical, has in-depth knowledge of the subject, works very well with the National Data Protection Authority and provides excellent service. Every time I have needed legal support from Thiago Sombra, I have been positively surprised with the work delivered with impeccable technical quality, punctuality and excellent legal strategy, as well as excellent customer service.'
- 'The cybersecurity and privacy team at Mattos Filho is extremely competent, organised and qualified. The lawyers stand out in the market for their professionalism, in-depth knowledge of cybersecurity and privacy issues, excellent client communication and constant accountability for the service provided.'
Key clients
- Amazon Web Services, Inc.
- Google Brasil Internet Ltda.
- WhatsApp LLC
- Meta Platforms, Inc.
- ByteDance Brasil Tecnologia Ltda. (TikTok)
- Visa do Brasil Empreendimentos Ltda.
- NU Pagamentos S.A.
- Crunchyroll, LLC
- Equinor Energy do Brasil
- OpenAI OpCo, LLC
- Incode Technologies Inc.
- Klavi Tecnologia Ltda.
Work highlights
Advised ByteDance on a data protection administrative proceeding.
Advised Incode on the acquisition of MetaMap, including its subsidiaries in Brazil.
Advised Meta on an administrative case with the Brazilian DPA regarding Meta’s new privacy policy for using personal data for training generative AI systems.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Leading associates
Leading associates with regular involvement in their team's key work, and recognition from peers or clients as being ones to watch.
Isabela Fernandes
Jaqueline Simas de Oliveira
Other key lawyers
Fabio Kujawski; Luiz Felipe Di Sessa; Paulo Brancher; Thiago Luis Sombra; Jaqueline Simas de Oliveira; Isabela Fernandes; Maíra Schweling Scala Pfaltzgraff