Mar 2026 AI share ranking
A monthly report of AI chatbot market share and usage worldwide and in Japan as of Mar 2026, with month-over-month change and fastest risers/fallers.
A. The bottom line for Mar 2026
Worldwide #1 is ChatGPT (about 78.2%).The fastest riser is Claude (MoM +1.53pt).
Worldwide share (Mar 2026)
| # | AI tool | Worldwide share | Share ratio | MoM | Trend |
|---|---|---|---|---|---|
| 1 | ChatGPT OpenAI | 78.17% | ▼1.82 | ||
| 2 | Google Gemini | 8.64% | ▲1.16 | ||
| 3 | Perplexity Perplexity AI | 7.07% | ▼0.81 | ||
| 4 | Microsoft Copilot Microsoft | 3.19% | ▼0.07 | ||
| 5 | Claude Anthropic | 2.91% | ▲1.53 | ||
| 6 | DeepSeek DeepSeek | 0.02% | ▲0.01 |
▲ Gained share
Claude▲1.53
Google Gemini▲1.16
DeepSeek▲0.01
▼ Lost share
ChatGPT▼1.82
Perplexity▼0.81
Microsoft Copilot▼0.07
Worldwide share history through Mar 2026
Japan share (Mar 2026)
| # | AI tool | Japan share | Share ratio | MoM |
|---|---|---|---|---|
| 1 | ChatGPT OpenAI | 63.15% | ▼4.25 | |
| 2 | Google Gemini | 20.53% | ▲2.76 | |
| 3 | Microsoft Copilot Microsoft | 7.05% | ▲0.07 | |
| 4 | Perplexity Perplexity AI | 5.32% | ▼0.87 | |
| 5 | Claude Anthropic | 3.88% | ▲2.26 | |
| 6 | DeepSeek DeepSeek | 0.06% | ▲0.01 |
Source: StatCounter Global Stats (AI Chatbot Market Share) ／ Captured: 2026-06-03 ／ reference value
Frequently asked questions
Which AI had the highest share in Mar 2026?
ChatGPT, with a worldwide market share of about 78.2% (StatCounter).
Which AI gained the most in Mar 2026?
Claude gained the most, at MoM +1.53pt.
⚠ These rankings are reference values based on public market-share data, web-traffic estimates and editorial research, and do not represent a complete count of every user of each AI tool. Rankings change with the measurement method (web-visit share vs. market share, etc.). Always check each official site for the latest information.