AI Source Influence Index
Updated June 2026

Which sources influence AI responses the most?

AI models like ChatGPT, Claude and Gemini draw knowledge from specific websites and sources. These are the platforms that have the greatest influence on AI-generated responses — ranked by global influence score.

What is the influence score?

The influence score (0–100) measures how much a source shapes AI model outputs. It factors in how frequently the source is cited in training data, how often AI responses reference information from it, and the source's domain authority. A score of 80+ means the source has a very strong influence on what AI models say.

Top 20 most influential sources

Ranked by global AI influence score across all source categories.

1
ClutchDirectories

clutch.co

B2B services directory with verified reviews and company profiles.

100
2
WikipediaWikis

wikipedia.org

Collaborative encyclopedia with broad coverage of companies and products.

99
3
G2Review sites

g2.com

Software review platform with product comparisons and user ratings.

99
4
WikidataWikis

wikidata.org

Structured knowledge base linking entities, facts, and identifiers.

98
5
CapterraDirectories

capterra.com

Business software marketplace featuring reviews, pricing, and comparisons.

97
6
TrustpilotReview sites

trustpilot.com

Consumer review platform covering companies, products, and services.

96
7
WikipediaWikis

en.wikipedia.org

Free online encyclopedia, heavily cited by AI models

96
8
Google ReviewsReview sites

google.com

Google Business Profile reviews

95
9
CNETArticles

cnet.com

A media website that provides news, reviews, and price comparisons for consumer electronics.

92
10
Business InsiderArticles

businessinsider.com

A news website that covers business, financial, and tech news with analytical insights.

91
11
RedditForums

reddit.com

Community forum with discussions, recommendations, and firsthand user experiences.

87
12
GlassdoorReview sites

glassdoor.com

Employee reviews and company info

87
13
Angie's ListDirectories

angieslist.com

A directory for finding and reviewing local service providers.

86
14
Google NewsNews

news.google.com

News aggregator surfacing current reporting from multiple publishers.

85
15
QuoraForums

quora.com

Q&A forum where users discuss companies, products, and services.

85
16
GartnerArticles

gartner.com

IT research and advisory

85
17
ReutersNews

reuters.com

Global newswire known for timely corporate and market coverage.

84
18
Stack OverflowForums

stackoverflow.com

Developer forum with technical answers, troubleshooting, and product discussions.

84
19
YelpReview sites

yelp.com

Local business reviews

84
20
GitHubOther

github.com

Open source and developer projects

83

Wikis

Encyclopedia and collaborative knowledge bases

Directories

Business listing sites and structured directories

+ 8 more directories tracked

Review sites

User review and rating platforms

Forums

Discussion boards and community Q&A

News

News outlets and press sources

+ 4 more news tracked

Articles

Industry publications and editorial content

+ 26 more articles tracked

Blogs

Expert blogs and thought leadership

+ 1 more blogs tracked

Social media

Social networks and content platforms

Other

Other influential web sources

Methodology

Influence scores are computed monthly using a combination of domain authority metrics, citation frequency analysis in AI training corpora, and web research via Perplexity Sonar. Scores are normalized on a 0–100 scale and refreshed at the start of each month.

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