Alexis RylkovsMathieu Gheerbrant

Alexis Rylko and Mathieu Gheerbrant represent two pillars of French enterprise technical SEO, both with 18 years of experience yet distinct operational contexts. Rylko operates within iProspect's global agency framework, handling technical SEO for multinational corporations where scale requires standardized processes and cross-border coordination. His expertise involves navigating complex corporate structures, translating technical requirements into language that resonates with C-suite stakeholders, and ensuring implementation across distributed teams. Mathieu Gheerbrant built SEO Hackers from the ground up, developing proprietary methodologies for site architecture and performance optimization since 2006. His agency approach allows deeper integration with client technical teams, often becoming an extension of in-house capabilities rather than external consultancy. Gheerbrant's strength lies in hands-on technical implementation—directly solving crawl management challenges, architecting site structures, and automating SEO processes. Where Rylko manages technical strategy at the portfolio level across multiple enterprise clients, Gheerbrant often achieves deeper technical integration with fewer clients. Both experts solve similar technical challenges: crawl efficiency, site architecture, performance optimization. The difference lies in operational model—Rylko within a global agency structure providing standardized excellence, Gheerbrant through an independent agency offering bespoke technical solutions. Enterprise clients choosing between them select between global agency resources and boutique technical depth.