Babel42 is a UK software company that builds AI search visibility and social listening tools. Its AI Visibility product shows whether ChatGPT, Claude, Perplexity, Gemini, Grok and Google's AI Overviews and AI Mode recommend a brand to buyers, why a rival wins, and what to fix. Instead of firing static prompts, Babel42 builds AI buyer personas and sends each one through a full buying journey, asking follow-ups and comparing options the way a real customer does. Its Social Listening product tracks brand mentions across social, video, news, developer, question-and-answer, blog and review sites, with AI scoring the sentiment of every post.