AI Source Influence Index
Updated April 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
WikipediaWikis

wikipedia.org

A free online encyclopedia that contains articles on a wide range of topics, including companies and services.

97
2
CrunchbaseDirectories

crunchbase.com

Startup and company database

96
3
WikipediaWikis

en.wikipedia.org

Free online encyclopedia, heavily cited by AI models

96
4
ForbesNews

forbes.com

Business and finance news

95
5
Google ReviewsReview sites

google.com

Google Business Profile reviews

95
6
TechCrunchNews

techcrunch.com

Technology startup news

94
7
G2Review sites

g2.com

Business software reviews

94
8
TrustpilotReview sites

trustpilot.com

Consumer and business reviews

93
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
ClutchDirectories

clutch.co

B2B ratings and reviews directory

89
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
RedditForums

reddit.com

Community discussions, high AI citation frequency

85
15
GartnerArticles

gartner.com

IT research and advisory

85
16
QuoraForums

quora.com

Q&A platform, widely indexed by AI

84
17
YelpReview sites

yelp.com

Local business reviews

84
18
GitHubOther

github.com

Open source and developer projects

83
19
SortlistDirectories

sortlist.com

Marketing agency directory

79
20
FoursquareDirectories

foursquare.com

A location-based service that provides recommendations for businesses and venues.

78

Wikis

Encyclopedia and collaborative knowledge bases

Directories

Business listing sites and structured directories

+ 7 more directories tracked

Review sites

User review and rating platforms

Forums

Discussion boards and community Q&A

News

News outlets and press sources

+ 3 more news tracked

Articles

Industry publications and editorial content

+ 26 more articles tracked

Blogs

Expert blogs and thought leadership

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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