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Search and AIAI chatbot market share, UK and worldwide, September 2026
ChatGPT accounted for about 80% of AI chatbot referrals both in the UK and worldwide in September 2026, according to StatCounter. Google Gemini is now a clear second, with Microsoft Copilot, Perplexity and Claude well behind.
Key findings
- ChatGPT held 79.8% of UK AI chatbot share and 80.47% worldwide in September 2026.
- Google Gemini rose to 10.21% in the UK in September 2026, up from 2.29% in September 2025.
- Microsoft Copilot's UK share fell from 9.52% in September 2025 to 5.68% in September 2026.
The data
| Chatbot | UK, September 2026 (%) | UK, September 2025 (%) | Worldwide, September 2026 (%) |
|---|---|---|---|
| ChatGPT | 79.8 | 80.83 | 80.47 |
| Google Gemini | 10.21 | 2.29 | 10.94 |
| Microsoft Copilot | 5.68 | 9.52 | 1.78 |
| Perplexity | 2.74 | 6.17 | 5.84 |
| Claude | 1.55 | 1.15 | 0.95 |
| DeepSeek | 0.01 | 0.03 | 0.02 |
Use this data
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Sources and method
- StatCounter Global Stats, AI chatbot market share United Kingdom (Monthly data, all platforms, September 2025 and September 2026)
- StatCounter Global Stats, AI chatbot market share worldwide (Monthly data, all platforms, September 2026)
Monthly AI chatbot shares for all platforms were downloaded from StatCounter's CSV export for the United Kingdom (September 2025 and September 2026) and worldwide (September 2026, the latest full month). Values are shown as published.
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