55 of the best marketing websites

Concrete metrics -- such as percentage increases in traffic, conversion rates, or revenue -- presented alongside named client case studies are far more convincing than vague claims. Animated counters, before-and-after comparisons, and video testimonials add credibility and engagement.

Bold typographic hierarchies, high-contrast colour schemes, scroll-triggered animations, and interactive project showcases are prevalent. Many agencies use their own site as a proving ground for emerging techniques, so the category tends to be an early adopter of new CSS and JavaScript capabilities.