If you sell to anyone who uses ChatGPT, Gemini, or Perplexity to research vendors, your visibility problem is no longer about Google rankings. It's about whether the AI mentions you when someone asks for "the best X for Y."

That's the gap generative engine optimization (GEO) tools are designed to close. Some only measure what AI is saying. Some help you produce content that AI is more likely to cite. A smaller group does both, in a loop.

This article walks through 11 tools I've worked with — what each is genuinely good at, where they break down, and what they cost.…