What measurable improvements in leads or conversions should we expect after migrating to HubSpot CMS?

A platform-only migration (moving pages as-is) typically produces modest improvements in page speed and minor SEO gains but limited conversion lift. A strategic migration that rebuilds messaging and conversion paths around buyer needs commonly produces 20% to 100% or more increases in lead volume within the first 90 days.

The performance gap between these two approaches is significant. A lift-and-shift migration delivers faster page load times (HubSpot's CDN and server infrastructure outperform most shared WordPress hosting) and eliminates plugin bloat, which can improve Core Web Vitals scores and produce incremental SEO gains. But if the same weak messaging and unclear CTAs move to the new platform, conversion rates stay flat. Strategic migrations that audit and rebuild each page's role in the buyer journey see materially different results. Lean Labs reports an average of nearly 2X lead increase post-launch across their migration clients, with individual cases ranging from tripled organic leads to 740% organic traffic growth. Most companies that combine platform migration with conversion optimization see positive return on investment (ROI) within six to twelve months through improved lead conversion rates and lower customer acquisition costs. The key metric to track is not traffic alone but marketing-qualified leads (MQLs) and pipeline generated from the website.