AI assistant market share
Which assistants are worth measuring depends on which ones people actually use. This is the market Presence's platform list is built from.
| Assistant | Company | Approximate share | Trend |
|---|---|---|---|
| ChatGPT | OpenAI | 46-54% | Still the clear leader, down from ~76% a year ago |
| Gemini | 27-28% | The biggest gainer | |
| Claude | Anthropic | 9-10% | The fastest-growing |
| DeepSeek | DeepSeek | ~4% | Flat |
| Grok | SpaceXAI | ~2.5% | Losing share |
| Copilot | Microsoft | ~1.3-2% | Flat |
| Perplexity | Perplexity | ~1.1-1.3% | Losing share |
The top three carry roughly 89% of assistant usage between them. Two platforms are measured for reasons the percentages do not show: Gemini's models also power AI Overviews and AI Mode inside Google Search, and almost all of Perplexity's usage is cited answer-engine queries, which is the behaviour cares about most.
Data as of June-July 2026, combining web-traffic panels (such as Similarweb) with app analytics (such as Sensor Tower). The two measure slightly different things, so treat the ranges as a guide rather than a census. The market also moves fast - a year earlier ChatGPT held three quarters of it - so revisit any decision that depends on these numbers.
Related
- Platforms we measure - every search engine and assistant, standard and premium
- - the programmes each assistant uses to read the web