AI Source Influence Index
Updated July 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 to 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
WikipediaWikis

wikipedia.org

Global wiki providing factual reference data on companies and products.

100
2
ClutchDirectories

clutch.co

B2B services directory with verified reviews and company profiles.

100
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
WikipediaWikis

en.wikipedia.org

Free online encyclopedia, heavily cited by AI models

96
7
TrustpilotReview sites

trustpilot.com

Consumer review platform covering companies, products, and services.

96
8
RedditForums

reddit.com

Largest forum for community discussions and product reviews cited by AI.

95
9
YelpReview sites

yelp.com

Directory of local business data and reviews trusted by AI models.

94
10
CNETArticles

cnet.com

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

92
11
YouTubeSocial media

youtube.com

Video platform with visual tutorials and product reviews highly cited by AI.

92
12
AmazonReview sites

amazon.com

Transactional and product data from Amazon widely cited for reviews.

92
13
Business InsiderArticles

businessinsider.com

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

91
14
Google ReviewsReview sites

google.com

Official docs and blog content from Google cited for company information.

91
15
TripAdvisorReview sites

tripadvisor.com

Review site for travel and service data cited by AI models.

90
16
FacebookSocial media

facebook.com

Social media platform for engagement and local events cited by AI.

88
17
GlassdoorReview sites

glassdoor.com

Employee reviews and company info

87
18
Angie's ListDirectories

angieslist.com

A directory for finding and reviewing local service providers.

86
19
Google NewsNews

news.google.com

News aggregator surfacing current reporting from multiple publishers.

85
20
GartnerArticles

gartner.com

IT research and advisory

85

Wikis

Encyclopedia and collaborative knowledge bases

Directories

Business listing sites and structured directories

+ 8 more directories tracked

Review sites

User review and rating platforms

+ 6 more review sites tracked

Forums

Discussion boards and community Q&A

News

News outlets and press sources

+ 8 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

+ 2 more other tracked

Methodology

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

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