Data & methodology
The AI share, usage and Popularity Score on this site are reference values based on public data and editorial research. For transparency, we publish our sources, definitions and update policy.
1. Core data principles
Figures (share, ranking) are imported from public sources, saved to a database as monthly snapshots, and displayed with the source and capture date shown on screen. We never publish AI-estimated figures as-is.
2. Types of metrics
- Market share (market_share)
- Web-visit share (web_visit)
- Search trend (search_trend)
- Popularity score (popularity_score)
Our current primary metric is market share (based on web-referral traffic via AI chatbots). It does not fully represent the “usage rate” across all users, and rankings change when the measurement method differs.
3. Data sources
- StatCounter Global Stats（AI Chatbot Market Share） — https://gs.statcounter.com/ai-chatbot-market-share
Method: AIチャットボット経由のWeb参照トラフィックを集計した市場シェア（Desktop & Mobile）。
License: 出典表示で利用可（StatCounter Global Stats）。 - 各AIツール公式（料金・機能） — https://aishare.itlibra.com
Method: 各公式の公開ページを編集部が整理（2026-06時点・参考値）。
License: 公式公開情報にもとづく参考値。
4. AI Popularity Score formula
Our proprietary “AI Popularity Score” is a transparent weighted average using only stored data.
AI Popularity Score = market share 55% + 3-month trend 20% + feature coverage 15% + free tier 10% (reference value, 0–100)
- Market share (55%): worldwide market share for the latest month (StatCounter).
- 3-month trend (20%): share change (pt) over the last 3 months, normalized to 0–100.
- Feature coverage (15%): the proportion of supported features such as Japanese, image, voice, search, code and API.
- Free tier (10%): whether a free plan is available.
Tools without public market-share statistics (e.g., Grok) are treated as “awaiting statistics” in the score ranking, and reflected as soon as share data becomes available.
5. Update frequency
Market share is updated monthly; pricing, features and news are updated as needed. Each month's share is kept as an archive, so we can continuously provide history, month-over-month change, and fastest risers/biggest drops.
6. Caveats on interpretation
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.
⚠ 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.