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Casus Belli

Blois, France
Prototype ideas, embody values, transform uses
Who are we? Casus Belli is a marketing consulting agency based in Hérouville Saint Clair. It brings together a collective of strategists and creatives to support companies and institutions in a changing world. Services Marketing strategy and brand positioning; support for digital transformation (project management); brand platform and graphic identity. Communication: design and deployment of communication plans, web platform, mobile application, event installation, social media plan, and event film. Technology: R&D, monitoring, feasibility studies, new interfaces, support, skills transfer, and maintenance in operational condition (TMA). Laboratory: customer experience, cultural-social exchanges, exploration and co-construction, Proof of Concept, restitution, and mediation. Approach Value-mobilizing method, rapid prototyping, and co-construction with stakeholders. Added value Alliance of strategic, creative, and technological expertise to transform ideas and uses into operational projects.
8 people in their team
Speaks English, French
Sortlist member since 2025
Founded in 2005
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Services

4 services offered by Casus Belli

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  • Description
    Nous concevons et pilotons campagnes publicitaires digitales, prototypes médias et placements ciblés, co-construits avec clients publics et privés pour transformer usages.
    Skills in Advertising (1)
    Digital Media Advertising
    Learn more about Advertising
  • Description
    Nous définissons plateformes de marque et positionnement en co-construction, traduisant valeurs et usages en identité stratégique et prototypes opérationnels.
    Skills in Branding & Positioning (1)
    Brand Consulting
    Learn more about Branding & Positioning
  • Description
    Nous élaborons stratégies digitales centrées sur prototypage rapide, transfert de compétences et maîtrise d’ouvrage pour accélérer la transformation numérique.
    Skills in Digital Strategy (4)
    Digital Media MarketingDigital Marketing ConsultingMarketing digitalWeb marketing
    Learn more about Digital Strategy
  • Description
    Nous concevons plans marketing et prises de parole multicanal, testés en atelier et prototypés pour amplifier la voix des valeurs.
    Skills in Marketing (2)
    Communication StrategyMarketing Consulting
    Learn more about Marketing
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Team

8 members in Casus Belli's team

StoryNous sommes Casus Belli, agence conseil en marketing fondée en 2005 à Hérouville Saint Clair. Dès le départ, nous avons constitué un collectif de stratèges et de créatifs pour accompagner entreprises et institutions face aux grandes mutations. Ce qui nous fait vibrer : transformer des idées en prototypes concrets — plateforme de marque, application mobile, installation événementielle — et donner une voix aux valeurs de nos clients. Nous aimons co-construire, tester rapidement et transmettre le savoir-faire en maîtrise d’ouvrage. Je me rappelle d’un POC lancé en urgence : nuits blanches, ateliers intenses, et un prototype remis qui a changé la trajectoire du projet. Aujourd’hui nous continuons, curieux et exigeants, aux côtés d’acteurs publics et privés.
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Details

  • Headquarter7 bis Place Saint-Louis, 41000 Blois, France