Lock-in is when leaving a tool costs so much that you stay whether or not it still serves you.
It is rarely a single wall. It is a page builder that turns to brackets when removed, a domain registered in someone else's name, or a builder with no export.
Some lock-in is fair. A platform's own features stop working when you leave the platform. The problem is when your own content and address leave with it.
Think Bright Sites draws the line clearly. The HTML file, words, photos and domain are yours and render anywhere. The editor, chat, forms-to-records, staging and hosting are ours and stop outside our platform. The README says exactly what to swap.
Export is getting your site out of a tool in a form that works somewhere else.
A registrar is the company where you bought and renew your domain name.
A single-file HTML page keeps its words, styling and layout in one file that any browser can open.
A page builder is a drag-and-drop tool inside WordPress or a hosted platform for laying out pages without code.
Paste your URL. We rebuild it, show you the match, and measure the speed. No template. No blank page. Human review from start to finish.