The AI chatbot field has become sharply concentrated, with ChatGPT capturing over four-fifths of all market activity, a dominance that leaves only small fractions for rivals like Perplexity, Copilot, and Gemini. Perplexity’s market share, while second, has declined from its March 2025 peak, illustrating the volatility and high stakes in this space. Despite efforts by various tech giants and startups, few have managed to break out of single-digit territory, signaling a market still seeking deeper competition and innovation.