Answerly Tracker Top pick
The only tool in this comparison whose pages state a margin of error: every rate comes with its sample size and a 95% margin of error, and a change smaller than the error bar is labelled as noise. Starter is $29/month, trial credits need no card, and the homepage lists ChatGPT, Gemini, Perplexity, Claude, Google AI Overviews and AI Mode. Share of voice and source reports start on the $89 Agency plan, the API is marked "soon", and a few of its own pages still describe the method inconsistently, which costs it points on openness.
Disclosure: Answerly Tracker is owned by the same company that publishes Vitasoft Index. It is scored on the same published criteria as every other tool here, from its public pages only, and this note stays next to its listing.