"Biggest" can mean revenue, headcount, global footprint or breadth of digital services. This guide focuses on sizable digital agencies and consultancies that deliver large-scale web design projects for enterprise and national brands in 2025 — plus where they excel and who they aren't right for.
Bigger agencies bring deep resources and expertise but also higher fees, longer timelines and heavier project governance. Small businesses and trades often need speed, affordability and easy updates more than enterprise processes.
Below are major global digital agencies and consultancies that dominate high-end web design and digital transformation projects.
Services: Digital strategy, UX, enterprise web platforms, martech
Massive global reach, strong systems integration skills and deep consulting experience. Typically used by enterprises for transformation rather than small-site builds.
Services: Strategy, design, engineering, CX, analytics
Combines consulting rigour with creative delivery. Ideal for organisations needing governance, compliance and deep analytics.
Services: Digital product, web platforms, data & AI
Strong in product-led transformations and large-scale experiences. Suited for brands wanting integrated digital ecosystems.
Services: Enterprise platforms, AI-driven experiences
Enterprise-grade engineering with an emphasis on AI, integrations and performance at scale.
Services: Creative-led design, marketing, brand experiences
Large creative networks that combine branding, advertising and web experience design for global campaigns.
Services: Innovation, product design, web & app engineering
Known for design-driven digital products and campaigns. Often engaged for high-visibility brand experiences.
Takeaway: The largest agencies offer unmatched capabilities for enterprise transformation, but they come with higher costs, more stakeholders and longer delivery windows. Small and medium businesses should weigh needs carefully before choosing scale over speed.
Answer these questions to match your needs with the right partner.
For most local trade businesses and single-location services, you get much better ROI from a fast, optimised local website and ongoing optimisation than a delayed, expensive enterprise project.
If you don't need an enterprise agency, Congero offers a faster, cheaper, managed alternative that still gives you a professional, SEO-ready website.
Price varies widely depending on scope, integrations and agency reputation.
DIY builders, specialist SMB providers, or AI-driven solutions
Custom themes, CMS setup, SEO & basic integrations
Full transformation, martech, cloud integrations
Switching providers is common. Follow this simple migration checklist to reduce risk.
Export current site, record redirects, and list integrations (CRM, payment, booking).
Keep URL structure where possible, maintain meta tags, and use 301s for moved pages.
Keep backups and a rollback plan for the first 30 days after launch.
Answers to common questions about choosing and working with the biggest web design companies.
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