HubSpot AEO is an answer engine optimization tool that tracks and improves brand visibility in ChatGPT, Gemini, and Perplexity AI-generated responses.
Perplexity is a freemium AI-powered answer engine that delivers real-time, cited responses using large language models, with a free tier and Pro plans starting at $20/month.
Yahoo Scout is a free AI search engine that converts natural language queries into cited, structured answers using Claude AI, Bing grounding, and Yahoo's data network.