Integration boundaries
Duda is a broader website-building and client-management platform. ReCopyFast does not create layouts or host sites; it adds an editing layer to authored copy already present on a site.
ReCopyFast can be added across different site stacks because its integration is a script, but installation requires permission to add a script and a compatible Content Security Policy (CSP). It edits existing authored copy; it does not build pages or migrate a site. Published edits are applied in the visitor's browser after the page loads. Visitors without JavaScript, and crawlers that do not render JavaScript, see the original HTML copy, so put SEO-critical copy in the site's source as well.