The short answer
Website builders are great for hobby projects and very early ideas. Once your website is responsible for generating real revenue (leads, calls, bookings or sales), a custom website usually pays for itself through better speed, search visibility and conversion rates.
Speed and Core Web Vitals
Drag-and-drop builders ship large amounts of generic code to every page, whether you use those features or not. Custom sites built with modern frameworks like Next.js pre-render pages and only send what's needed.
Google uses Core Web Vitals as a ranking signal, and visitors abandon slow pages quickly. Faster pages mean better rankings and more conversions.
SEO control
Builders often limit control over structured data, URL structures, rendering and technical details. A custom build gives you complete control over every SEO lever: schema markup, internal linking, canonical tags and page architecture.
Ownership and lock-in
With a builder, you rent your website. If prices rise or features change, moving is painful. With a custom site, you own the code and can host it anywhere.
Cost over time
Builders look cheaper up front, but monthly fees, paid apps and lost conversions add up. A custom site is an asset: a one-time investment with low ongoing hosting costs and a much higher ceiling.