AI Search Engine War 2026: Can Perplexity, You.com, or SearchGPT Replace Google?

By 2026, AI search has become the biggest transformation in information retrieval since Google. Perplexity AI surpasses 100 million monthly active users, SearchGPT officially launches, and Google AI Overview draws intense attention from SEO professionals. This article analyzes the AI search market landscape, core differences among products, and the profound impact of AI search on content creators and SEO practitioners, along with strategies to adapt.