The AI Visibility Index
Explore the strategies powering today's AI search leaders and get clear steps to build your own.
AI has rewritten the rules of search.
ChatGPT, Google AI Mode, and other platforms enable discovery through conversation, not just keywords. Search engines are no longer the only path to organic visibility.
How we track the brands AI recommends
Our AI Visibility Index reveals who's winning in AI search and how they're doing it.
We analyzed 2,500 prompts and responses across 5 major industries to find:
This data is powered by AI Optimization (AIO) from Semrush Enterprise
Built for brands who want to lead the AI search era and control their AI search visibility across mentions, sentiment, sources, and competitors.
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Brand Leaderboard
The top brands by share of voice, filtered by date, industry and AI platform.
Our Share of Voice (SoV) metric was updated in October 2025 to reflect prompt volume (how often a prompt is searched). All data has been updated to reflect this and the trends remain consistent.
Share of Voice is a Semrush metric that takes into account how often a brand is mentioned and in what position. For example, if a brand was mentioned first in every AI answer, they would achieve an SOV of 100%
Mentions: By mentions, we mean how often a brand name is included in the actual AI answer text.
Brand Performance
The brand performance bubble chart shows how brand mentions relate to overall market share.
Our Share of Voice (SoV) metric was updated in October 2025 to reflect prompt volume (how often a prompt is searched). All data has been updated to reflect this and the trends remain consistent.
Share of Voice is a Semrush metric that takes into account how often a brand is mentioned and in what position. For example, if a brand was mentioned first in every AI answer, they would achieve an SOV of 100%
Mentions: By mentions, we mean how often a brand name is included in the actual AI answer text.
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Why visibility in AI search matters
Users who search with LLMs are 4.4× more likely to convert than those using search engines.
AI-generated results are projected to overtake organic search traffic by 2028.
Every day, ChatGPT receives 2.5 billion prompts from over 190 million users.
See exactly who your brand is up against
Use our explorer to find each leading brand’s closest competitors in seconds.
How? We analyzed how often brand pairs were mentioned together in AI-generated responses and mapped the top 10 brands in each vertical to their 20 most frequent competitors
Curious who Garmin’s top rivals are in Google AI Mode? Just use the filters below to find out.
Want more actionable strategies to outpace competitors in AI search?
Download the full studyBrand competitors
How often brand pairs were mentioned together in AI-generated prompts. Select a brand and see its 20 most frequent competitors.
1. Choose the date.
2. Choose your AI platform
3. Choose your industry vertical.
4. Choose the brand you want to find competitors for.
Brand diversity
Brand diversity is a measure of how many unique brands appear in an industry vertical. The higher the diversity score, the more brands, and the more competition.
The lower the score, the more saturated the vertical is with major brands.
Brand Diversity Score: We calculate how many unique brands appear in a vertical, then divide by the total number of prompts.
Example: If the same brands show up in every prompt, the score is 1 (low diversity). If 5 different brands appear per prompt, the score is 5 (high diversity).
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See which sources fuel the most AI answers
To uncover this, we surfaced the top 10 sources used by each AI model across five industries. Want to see ChatGPT’s favorite sources for finance? Find out in seconds.
We’ve also visualized source diversity across industries to map the competitive landscape for getting cited in AI search.
Find the key sources and strategies that are shaping AI visibility in your industry.
Download the full studyTop 10 Sources
Simply select the vertical to see the top 10 cited sources for each AI model.
These charts show the percentage of prompts featuring each source. A value above 100% means the source appears more than once per prompt on average. For example, 135% for Reddit means it appears 1.35 times per prompt.
Source: By source we mean a website domain that is used by AI search to formulate its answer (typically these are highlighted in a sidebar or listed at the bottom of an answer).
Source Diversity
How many unique sources appear in a vertical, divided by the total number of prompts.
As Semrush Enterprise continues to enhance AIO, it is now capturing a broader range of sources in AI search, explaining the increase in December 2025.
Source Diversity Score: We calculate how many unique sources appear in a vertical, then divide by the total number of prompts. Example: If the same sources are cited in every prompt, the score is 1 (low diversity). If 5 different sources are cited per prompt, the score is 5 (high diversity).
How brands compare across ChatGPT and Google AI Mode
Which brands and sources do these different AI models rely on and how much do they overlap?
Let’s deep dive into the similarity of the top sources and brand mentions for each AI platform by vertical. How often do ChatGPT and Google AI Mode rely on the same sources and brands? This helps uncover how each model composes its answers.
Overlap of top 100 sources and mentions
We looked at how many of the top 100 cited sources also appeared in the top 100 mentioned brands within each AI model and vertical.
A higher number indicates greater overlap between sources and brand mentions, revealing how often trusted sources are also recognized brands that earn a mention.
Source-source overlap: We take the top 100 sources from each model and compare how similar they are.
Similarity of brand mentions
We analyzed how similar the top 100 mentioned brands are across ChatGPT and Google AI Mode, segmented by industry. This highlights the overlap between them and the need for multiple optimization strategies.
Mention-mention overlap: We take the top 100 mentioned brands from each model and compare how similar they are.
Similarity of cited sources
We compared how similar the top 100 cited sources are across ChatGPT and AI Mode, broken down by industry. This reveals whether different sources are favored and a targeted strategy is needed for each platform.
Source-source overlap: We take the top 100 sources from each model and compare how similar they are.
Download the full AI Visibility Index study
Explore a deeper analysis and get actionable strategies on how to win in AI search.
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