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Advertising ServicesEngland, United Kingdom201-500 Employees

Pencil functions as an AI operating system for marketing, integrating models from multiple providers into a single governed platform known as the Open Garden. This setup unifies the entire marketing workflow—from insight and creative concept through production, governance, and media distribution—allowing enterprise teams to design, orchestrate, and scale campaigns that work across markets and languages while preserving brand control. The system foregrounds governance and security, backed by protections such as SOC 2 certification and IP indemnification.

Pencil targets large enterprise brands within advertising services, with clients that include Diageo, Unilever, Indeed, and L’Oréal. Founded in 2018 and based in London, England, it has been part of The Brandtech Group since 2023. A notable development in 2025 is a partnership with the Boston Consulting Group to help companies develop AI-enabled advertising through Pencil Pro.

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