Gruper

Gruper started from a simple frustration: I work with 40 to 80 tabs open and Chrome's manual tab groups never survive the next research detour. So Gruper does it for you. It looks at your open tabs and quietly clusters them by topic in the background, then renames the groups when the shape of your work shifts.

Everything runs locally in the extension. There's no dashboard, no account, no server round trip on every page load. Open a window, work normally, and your tabs stay organized without you thinking about it.