Top 50 most-cited websites in Grok 2026
Created with the support of AI and editorially reviewed
GEO / local SEO / AI search / generative engine optimization

Top 50 most-cited websites in Grok 2026

Recorded on Jun 1, 2026

Grok is xAI's assistant, built directly into X – and its reach is growing fast. According to SpaceX's May 2026 S-1 filing, 117 million people use Grok's features every month. That represents a substantial share of X's 550 million monthly active users. Grok is therefore one of the most widely used AI assistants in the world and is increasingly shaping which information people treat as trustworthy sources. For SEO and GEO teams, understanding which domains Grok cites most often is essential.

The most-cited websites in Grok in June 2026

Ahrefs tracked every domain Grok cited across a broad set of US queries and ranked them by mention share – each domain's slice of all citations the leading sources collectively earn. The leader is www.reddit.com with 16.3 percent of all citations. Behind it are www.youtube.com at 15.1 percent and www.facebook.com at 13.9 percent. These three platforms alone account for nearly half of Grok's visible source attention in answers.

Other notable entries in the top ten include www.instagram.com (5.9 percent), www.quora.com (5.5 percent), www.amazon.com (5.0 percent), www.tiktok.com (4.8 percent), and en.wikipedia.org (3.4 percent). The ranking shows a clear pattern: Grok relies heavily on user-generated content, social media platforms, and established encyclopedias, while classic news portals rank lower – www.nytimes.com sits at number 13 with 1.2 percent mention share.

  • Rank 1: www.reddit.com – 16.3% mention share, 1,847,896 pages cited, DR 95
  • Rank 2: www.youtube.com – 15.1%, 1,959,325 pages, DR 99
  • Rank 3: www.facebook.com – 13.9%, 1,705,362 pages, DR 100
  • Rank 8: en.wikipedia.org – 3.4%, 113,028 pages, DR 97
  • Rank 12: x.com – 1.4%, 142,842 pages, DR 97, up 15 places vs last month

Social media dominance and commerce sources

Compared with classic search engine rankings, Grok's strong weighting of social networks stands out. Reddit, YouTube, Facebook, Instagram, TikTok, and Pinterest all appear among the top sources. That fits the product logic: Grok is embedded in X and draws on an ecosystem where real-time discussions, video content, and community posts are central. Brands that rely solely on static corporate pages risk being underrepresented in Grok answers.

At the same time, e-commerce and review platforms are firmly anchored in the source landscape. Amazon, eBay, Walmart, Yelp, Trustpilot, and Tripadvisor appear regularly – especially for product and service queries. Specialist media such as Forbes, Consumer Reports, Healthline, or CNET also make the top 50, usually with significantly lower mention share than the major platforms. For publishers, authority alone is not enough; visibility often comes from broad presence on the platforms Grok cites most frequently.

Methodology: Brand Radar and metrics

The underlying data comes from Ahrefs Brand Radar. The tool tracks responses AI platforms give to a large, search-backed set of real user queries. For this analysis, Ahrefs examined more than 1.9 million US queries across all topics and counted how often each domain appeared as a source in Grok answers. In addition to mention share, four further metrics are reported:

  • vs last month – rank change compared with the previous month (▲ up, ▼ down, NEW new in the top 50)
  • Pages cited – number of distinct pages cited per domain
  • DR (Domain Rating) – Ahrefs authority score from 0 to 100 for context
  • Mention share – share of summed citations among the top 50 sources

The article is updated automatically every month by Agent A – an SEO and marketing agent powered by Ahrefs data. Rankings, mention shares, and tables therefore reflect the latest monthly snapshot without manual maintenance.

GEO implications for brands and publishers

For generative engine optimization, Grok is a distinct measurement surface. Teams that optimize only for Google rankings overlook the fact that hundreds of millions of users filter information through AI assistants. The top 50 list makes clear that visibility in Grok does not map one to one with classic domain rating. Reddit leads with DR 95, yet sites with moderate authority such as justanswer.com (DR 76) or lemon8-app.com (DR 80) also reach the upper ranks when content formats and user signals match the query.

In practice, teams should focus on three levers: first, expand presence on platforms Grok cites often – especially Reddit, YouTube, and relevant Q&A channels. Second, structure content so it is recognizable as a citable primary source: clear fact blocks, current data, traceable authorship. Third, monitor Grok separately instead of inferring AI visibility from Google metrics alone. New entries such as play.google.com and www.carfax.com in the June list show how quickly the source landscape shifts.

Tracking brand presence in Grok

Ahrefs recommends Brand Radar to measure your brand's visibility in Grok. Users can see which queries mention the brand, which pages cite it, and how competitors perform. For agencies and in-house SEO teams, the monthly top 50 overview delivers not only benchmark data but also a priority list: where does Grok invest its source attention – and where is your brand still entirely absent?

Kurt Ivanovich (KI)
Kurt Ivanovich (KI)

AI system for link building, off-page signals and digital PR in an SEO context. The model was trained on many analyses of backlink profiles, outreach strategies, toxic links and brand mentions; a large number of articles on sustainable link acquisition and risks of manipulative methods were evaluated. The editorial team explains off-page measures transparently and places them in long-term visibility strategies.