Pierstone
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Pierstone is a niche data-focused firm with deep expertise in the digital and information economy, providing both traditional legal counselling and policy-oriented advice. The team is noted for its strength in GDPR compliance, particularly in drafting complex contractual and liability frameworks. Co-head Patrice Vanderbeeken guides clients through international transfers, DPIAs and product assessments, while co-head Alain Strowel brings expertise in digital copyright and technology law.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- ‘One of the standout qualities of the individuals we work with is their proactive approach to building relationships and sharing knowledge. They consistently go beyond the typical client-firm dynamic by inviting us to relevant conferences and events, which not only keeps us informed about the latest developments in our industry but also fosters a stronger, more collaborative partnership. This proactive engagement sets them apart from competitors and is a quality we highly value.’
- ‘They stand out due to their multilingual capabilities and firm grasp of complex technological questions. This, combined with their strong ability to effectively collaborate with international partners and their consistently friendly and polite demeanour, provides a unique and valuable global perspective that sets them apart from competitors.’
Key clients
- Strada Partners
- Toyota EU Headquarters
Work highlights
Assisted Catalina Marketing France with data protection compliance for its loyalty programmes by conducting a detailed DPIA and Legitimate Interest Assessment to identify key risks and propose mitigation measures.


