Visibility index · United States
Online stores
72 AI answers to 15 prompts name 42 brands. Amazon leads with 13.9% of mentions; the top 3 hold 36.1%.
Level 3n = 72 answers15 promptsupdated Oct 8, 2026AI Mode18ChatGPT18AI Overviews18Gemini18
AI answers
72
15 prompts
Last run Oct 8, 2026
Brands seen
42
Top 3 hold 36.1%
n = 72 answers
Concentration
Fragmented
HHI 596 · leader 13.9%
Leader
Amazon
13.9% of mentions
Avg. position #3.7
Top engine
AI Mode
25% of answers
4 engines sampled
Sources cited
152
Top: target.com 7.9%
n = 72 answers
What AI answers show
Brands and sources in the sampled answers
n = 72 answers15 promptsOct 8, 2026
Brands AI recommends
Share of brand mentions in Online stores answers
- 1Amazonavg. #3.713.9%59
- 2Targetavg. #3.311.6%49
- 3Walmartavg. #2.610.6%45
- 4Best Buyavg. #4.55.9%25
- 5Costcoavg. #6.04.7%20
n = 72 answers42 brands seen in total
Market concentrationFragmented
FragmentedModerateConcentrated
HHI 596Leader 13.9%Top 3 36.1%
Fragmented: no brand dominates. The top 3 hold 36.1% of mentions; the leader 13.9%.
Answers behind the ranking
Every engine sampled
- Google AI Mode18
- ChatGPT18
- AI Overviews18
- Gemini18