According to Statcounter data from September 2026, ChatGPT holds the largest share of global AI chatbot usage, accounting for 80.48% of visits to websites. Gemini follows with 10.91%, while other chatbots such as Perplexity (5.85%), Microsoft Copilot (1.79%), Claude (0.95%), and DeepSeek (0.02%) occupy smaller shares. Statcounter measures these figures based on "referrer" data, which tracks the source of clicks to websites rather than individual user activity. Grok and Mistral are not included in the rankings as they do not transmit this information. Over the past twelve months, ChatGPT's share has fluctuated, starting at around 81%, dropping to 77% in April, and then rising again. In contrast, Gemini has seen a significant increase, rising from approximately 3% in the fall of 2025 to over 10% in September 2026. During the same period, Perplexity's share declined from about 11% to 5.85%, while Copilot dropped from about 4% to 1.79%. On computers, ChatGPT accounts for 80.03% of visits, and Gemini holds 11.21%. However, on mobile devices, ChatGPT's share rises to 83.66%, while Gemini's share declines to 8.83%. Perplexity shows the opposite trend, with a higher share on mobile devices (6.92%) compared to computers (5.67%). Microsoft Copilot and Claude remain below 1% on mobile devices. In Europe, ChatGPT holds a 79.04% market share, with Gemini at 12.68%, Perplexity at 3.67%, Copilot at 3.2%, and Claude at 1.39%. In Europe, Gemini, Copilot, and Claude have a greater weight than globally. On mobile devices in Europe, ChatGPT reaches 88.01%, while Gemini is at 8.34%. DeepSeek remains negligible, not exceeding 0.05% in Europe. In France, ChatGPT holds a 79.03% share across all platforms, with Gemini at 11.82%, Perplexity at 4.62%, Copilot at 2.72%, and Claude at 1.8%. On computers, ChatGPT drops to 77.88%, while Gemini rises to 12.18%, significantly ahead of Perplexity (4.94%). Copilot reaches 2.99%, and Claude reaches 2.01%, nearly double its global share on computers. On mobile devices, ChatGPT rises to 87.91%, ten points higher than on computers, while Gemini is at 9.03%, Perplexity at 2.19%, Copilot at 0.66%, and Claude at 0.17%. The data indicate that Gemini's share is lower on mobile devices compared to computers, both globally and in France. This may be due to the increasing integration of AI into mobile operating systems, such as Android, where Gemini often functions as an assistant, responding to voice commands or launching actions without requiring a click to a website. Such interactions do not leave a trace in the "referrer" data tracked by Statcounter. Additionally, links opened from applications may not systematically transmit the "referrer" to the visited website. In September 2026, Google's usage rate was recorded at 99.61%, significantly higher than ChatGPT's 0.39%. In France, Google's usage rate was 99.78%, compared to ChatGPT's 0.22%.