Assertive

A London-based agency established in 2007, Assertive works with medium to large businesses, including enterprise-level and regulated sectors such as healthcare, pharmaceutical, cybersecurity, legal, financial services, fintech, banking and insurance. Case studies referenced on its site include work for Lenovo EMEA and Emma Sleep, indicating experience with both technology and consumer brands operating across multiple markets. The agency positions itself around performance-driven digital marketing, with a focus on measurable revenue growth for clients. The service range covers SEO, PPC, social media marketing, web design and development, and mobile app development, alongside more specialised offerings. On the SEO side, this includes enterprise SEO audits for large, complex sites, technical SEO consultancy, page indexing support, manual action and algorithm recovery, domain and CMS migration support, international SEO, ecommerce SEO, link building and digital PR, HARO-based backlink acquisition, and keyword research. It also offers AI-focused services such as LLM optimisation, SEO for Google AI Overviews, Gemini-specific SEO, AI readiness audits and AI visibility tracking, plus AI engineering work including in-house automations, agent workflows using tools like n8n and Make, and search console data warehousing. Paid media services extend to PPC audits, Google Shopping and Performance Max management, and paid and organic social media marketing across major channels.