Which brands AI assistants name, by software category

Every week each category is read on a rotating four of its eight buying questions, on ChatGPT, Perplexity, Claude and Google AI Overview, once each. No question names a brand. Every question is read once every two weeks, so each figure is counted over a two-week window of up to 32 answers and carries its n. A read that fails is left out of n, never counted as "not named".

A figure counted over too few answers is withheld, not approximated. A leaderboard is published when its window has 16 answers or more; one engine's figures for a brand are published when that engine's n is 8 or more. A withheld figure shows as a dash.

A brand whose share of answers moved by 10 percentage points or more between last week's window and this week's. A move is published only when both windows are publishable, with both shares and both n.

Yes, with no account: send the brand's domain and an email address at that domain to the opt-out endpoint, then press the button in the confirmation email. The brand is removed from every leaderboard within 10 minutes and stays out of later ones. The other brands keep their positions.