Instagram deletes chats one at a time. Clearbox clears the whole inbox — everything or a set number, at a speed you pick. What's different: protected chats. Scan your inbox once, tick the names you never want removed, and they are skipped on every run. There is no undo on Instagram's side, so that was the point. Nothing else in this category does it. It also logs every deleted chat by name, so you can find them again. No account, no password, nothing leaves your browser. Free, 52 languages.