With a particularly active IT practice, OYAT’s team is capable of advising clients on the full gamut of IT issues, ranging from the drafting and negotiating of cloud, licence and integration agreements to audits and GDPR compliance. The team is also recognised for its strength in litigation, including disputes over software counterfeiting and the execution of contracts. Spearheading the practice, Marie-Hélène Tonnellier takes the lead on e-commerce and data protection matters as well as internet law and intellectual property issues. Charlotte Barraco-David is a name to note for GDPR compliance and online verification procedures.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- 'Marie-Hélène Tonnellier stands out as France’s premier authority in TMT law, and she’s my go-to expert for all things technology, intellectual property, and data privacy. Her presence dominates top tech law conferences, her thought leadership shapes the field, and her blend of professionalism and approachability makes her truly a one-off.'
- ‘Marie-Hélène Tonnellier and her colleague Camille Guyot are skilled at providing concise and comprehensive legal analyses and finding the right arguments to defend their clients. Furthermore, they also know how to proactively offer solutions to their clients.’
- 'OYAT’s IT and internet practice is highly regarded for its deep expertise in handling complex legal issues. The team’s ability to address matters such as IT contracts, data protection, and emerging technologies like AI ensures that clients receive cutting-edge and commercially sound advice.'
- ‘Potential clients should know that OYAT excels in providing tailored solutions for businesses navigating the digital landscape. Their ability to bridge the gap between legal frameworks and technological advancements makes them a trusted partner for innovation-driven organizations.’
- ‘A dynamic team of digital law experts who demonstrate a very high level of responsiveness.’
- 'The team stands out for its technical mastery of contractual issues related to intellectual property, liability, and cybersecurity, while remaining pragmatic and solution-oriented.'
Key clients
- MODEO
- Citegestion
- Enedis
- BUT
- Coriance
- EDF
- Conforama
- Nouvelle Aquitaine Mobilités
- Bourgogne Franche Comté
- SNCF-CONNECT
- Neocase
- Eurovision
Work highlights
Assisting Modeo in structuring, drafting and negotiating its SaaS agreement templates.
Assisting Coriance in IT law and data issues, including negotiating a major contract for the implementation of a new ERP finance and HR system in SaaS mode.
Assisting Nouvelle Aquitaine Mobilité (NAM) in the implementation of its MaaS project, advising NAM on regulatory matters, and assisting in the drafting and negotiation of IT contracts and personal data issues.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Charlotte Barraco-David
Practice head
Marie-Hélène Tonnellier
Other key lawyers
Charlotte Barraco-David; Camille Guyot