01
No assistant attached to every page.
There is no built-in chatbot beside the page, and no assistant that reads or writes for you.
A quieter browser
A browser without AI built in.
Lean has no AI built into the browser. No chatbot beside your tabs, and no assistant that reads or writes for you. AI tools remain websites you choose to open, like any other.
What “without AI” means here
02
No browser account required.
You can install and use Lean without creating an account for browser features.
03
Web tools still work.
This does not block websites that use AI. If you choose an online tool, it works as a website under that service’s own terms.
What Lean adds instead
Tools that improve browsing itself.
Lean puts its effort into native ad blocking, separate account sessions through Contexts, and temporary Parentheses windows.
A browser that stays a browser.
Free for Windows 10 and 11. No account required.