William Deneault-Rouillard

William Deneault-Rouillard


Fasken

Recognized since 2025

Montréal, Quebec

Practice Areas

Information Technology Law

Privacy and Data Security Law

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William’s practice includes a focus on commercial law, data governance, privacy, cybersecurity and online marketing. He assists emerging tech companies and data-driven businesses with legal risk management and contractual negotiations, and advises them on the operationalization of concepts such as privacy by design in a wide range of industries, including software-as-a-service (SaaS), big data, FinTech, EdTech, MedTech, the Internet of Things (IoT), artificial intelligence (AI), neurotechnology and blockchain.

William is known for his ability to provide creative solutions adapted to clients’ strategic and business objectives. The companies he assists range from start-up and emerging companies to Fortune 100 and 500 companies.

With a background as a M&A corporate lawyer, William frequently drafts and negotiates various types of commercial contracts, including SaaS and data processing agreements. He also advises clients on consumer protection requirements applicable to e-commerce and digital services. Recognized by his clients and his peers for his versatility, William also provides regulatory advice on all issues related to the Charter of the French Language, product labelling and advertising.

Location
  • 800 Victoria Square, Suite 3500
    P.O. Box 242
    Montréal, QC H4Z 1E9
    Canada

Fasken
Headquarters: Toronto, Ontario

389 The Best Lawyers in Canada awards

90 Best Lawyers: Ones to Watch in Canada awards

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Recognized in Best Lawyers: Ones to Watch in Canada 2025 for work in:
  • Information Technology Law
  • Privacy and Data Security Law

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