What Cabinet Plasseraud does

Cabinet Plasseraud, doing business as Plasseraud IP, is a French intellectual-property advisory firm founded in 1906 and headquartered at 104 rue de Richelieu, Paris. The firm operates as a private Société par Actions Simplifiée (SAS) with a wholly-owned subsidiary, Ernest Gutmann-Yves Plasseraud (E.G.Y.P.) SAS, and is managed by Managing Partner Guylène Kiesel Le Cosquer alongside a collegiate partner structure. Plasseraud IP delivers end-to-end intellectual-property services — patent filing and prosecution, trademark and design registration, anti-counterfeiting enforcement, IP contracts and valuation, geographical indications, and formal legal representation through its Plasseraud IP Avocats sub-brand — before the INPI, EPO, EUIPO, and international IP offices. It is recognized as a top-tier French and European IP practice by IAM Patent 1000, WTR 1000, the Financial Times Europe Leading Patent Law Firms 2026, and Best Lawyers 2027, and holds ISO 9001 certification across its French offices.

The firm runs a B2B professional-services model with 251-500 employees across seven French offices (Paris, Lyon, Lille, Toulouse, Bordeaux, Rennes, Strasbourg) and an international office in Tokyo, supplemented by an agent network for cross-jurisdiction filings. Revenue is generated primarily through time-based professional fees with fixed-fee arrangements for standard procedures, supplemented by pass-through official IP-office fees with administrative handling charges. Client segments include R&D-intensive innovative companies, startups, luxury and fashion brands, and agricultural/artisanal producers — with a recent high-profile advisory engagement for Mistral AI on the Emmi AI acquisition. The firm distributes through direct account management and proprietary client portals (online.plass.com, iprcontrol.fr), and markets via thought-leadership content, industry events (AIPPI, PTMG, VivaTech), and PR in legal trade publications. Underlying technology is a proprietary IP case-management system and multi-jurisdiction prosecution platform; the firm does not disclose AI/ML capabilities.

In June 2026 the firm entered what Managing IP described as a 'new era,' taking on private-equity backing from Andera Acto to accelerate development, coinciding with its 120th anniversary celebration.

Name

Cabinet Plasseraud

Legal name

Plasseraud IP, Société par Actions Simplifiée (SAS)

Website

https://plass.com

Company type

Private

Founded year

1906

Operating status

Operating

Headcount range

251–500 employees

Short description

Plasseraud IP is a 120-year-old French intellectual-property advisory firm providing patent, trademark, design, anti-counterfeiting, and IP-litigation services through seven French offices and a Tokyo office, serving innovative corporates, startups, and luxury brands before the INPI, EPO, and EUIPO.

Ownership category

akta.pro rank

Product category

Intellectual Property Services

NAICS

Professional, Scientific, and Technical Services (541)

SIC

Patent Owners & Lessors (6794)

akta.pro primary industry

Patent Prosecution & Portfolio Management (BPAHAMAA)

Keywords

• Intellectual property services
• Patent prosecution
• Trademark registration
• IP legal consulting
• Anti-counterfeiting services

Headquarters

HQ city

Paris

HQ country

France

HQ region

Europe

Offices8 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Professional IP Consulting Services: Time-based consulting services for IP protection, prosecution, and defense. Includes patent filing, trademark registration, anti-counterfeiting, and litigation support. Services billed at hourly rates or fixed fee arrangements.
2. Official Fees Reimbursement: Official fees charged by IP offices (INPI, EPO, EUIPO, OMPI) for filings and maintenance are passed through to clients at cost plus administrative handling fees.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Cabinet Plasseraud is a French intellectual property firm that provides patent drafting and prosecution, trademark and design registration, IP contracts and valuation, geographical indications, anti-counterfeiting enforcement, internet and data protection services, and dedicated startup IP support. The firm represents clients before national (INPI) and international IP offices including the EPO, EUIPO, WIPO, JPO and USPTO, and combines attorneys, trademark attorneys, lawyers and engineers to cover the full IP lifecycle.

Differentiator

Problem solved

Functional benefit

Brands

• Plasseraud IP Brevets: Patent prosecution, defense, and strategy services.
• Plasseraud IP Marques & Modèles
• Plasseraud IP Internet & Data
• Plasseraud IP Start-up
• Plasseraud IP Contrats & Valorisation
• Plasseraud IP Origines & Qualités
• Plasseraud IP Anti-contrefaçon
• Plasseraud IP Avocats

Products and services

• Plasseraud IP Brevets (Patents)

Quantifiable outcome

• Ranked top firm in France and before EPO for patents by IAM Patent 1000 2026
• +2 more outcomes

Named customers3 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

One partnership is on record.

• Mistral AImajorStrategic or Co-development Partner · 16 June 2026Plasseraud IP acted as strategic IP advisor to Mistral AI for the acquisition of Emmi AI, marking an important milestone in Mistral AI's growth trajectory.

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Regimbeau: Paris-headquartered IP firm offering patent, trademark, and design services across France and internationally. Like Plasseraud, it serves innovative corporates, life sciences, and luxury brands with comparable EPO/EUIPO prosecution capabilities.
• Casalonga: Long-established French IP firm headquartered in Paris with similar practice areas (patents, trademarks, designs, litigation) and historical French/European client base, directly comparable to Plasseraud in scale and service mix.
• Marks & Clerk: UK-headquartered specialist IP firm with extensive pan-European office network and similar patent/trademark prosecution focus. Comparable to Plasseraud on EP/EUIPO work and as a brand-led specialist competitor.
• Santarelli: Leading French IP firm with patent, trademark, design, and litigation practices across France and Europe. Direct competitor for the same French enterprise and EPO client base as Plasseraud.
• Novagraaf (Questel): European IP services group integrated with Questel's IP intelligence platform, providing patent and trademark prosecution, IP management software, and consulting. Competes with Plasseraud across French and EU IP outsourcing and IP portfolio management.
• Lavoix: Paris-based IP consultancy covering patents, trademarks, designs, and domain names with multi-jurisdictional prosecution capacity. Direct competitor to Plasseraud for French and European IP work, particularly in life sciences and mechanics.

Broad incumbents

• Hogan Lovells: Global law firm with a sizeable IP practice, including French IP attorneys acting before INPI, EPO, and EUIPO. Competes with Plasseraud for high-value French patent and trademark mandates and overall IP portfolio work.
• Bird & Bird: Global law firm with a market-leading IP practice spanning patents, trademarks, and IP litigation across 30+ offices. Overlaps with Plasseraud on EPO/EUIPO prosecution for French and pan-European clients, but competes from a much larger full-service legal platform.

Regional players

• Gevers: Belgian IP firm with patent, trademark, design, and IP litigation practices across Benelux and broader Europe. Comparable to Plasseraud in specialist positioning, but primarily competing for Benelux-headquartered clients rather than French ones.
• HGF (Hellerhoff & Franz): Top-tier European IP-only firm with offices in the UK, Netherlands, Germany, Ireland, and France. Closely comparable to Plasseraud in specialisation and EPO/EUIPO capability, but anchored in Northern European rather than French-headquartered clients.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xtwitter.com/plass_ip
• LinkedInlinkedin.com/company/cabinet-plasseraud

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Cabinet Plasseraud