Grok is xAI’s assistant, built directly into X, and this distribution gives it real influence.
According to SpaceX’s May 2026 S-1 filing, 117 million people use Grok’s features each month, out of X’s 550 million monthly active users. That makes it one of the most used AI assistants in the world and has a growing influence on how people find information. So the sources Grok relies on actively shape what hundreds of millions of users read.
To figure out which sites these were, we tracked every domain cited by Grok across a wide range of searches in the US and then ranked them by mention share – each domain’s share of all citations that the top sources receive overall. The leader is www.reddit.comwhich corresponds to 16.3% of the citations.
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Mention share = citations of a domain as a percentage of the total citations of the top sources. Data via Ahrefs Brand Radar · United States, all subjects · June 2026.
| # | website | Mention sharing | compared to last month | Pages cited | DR |
|---|---|---|---|---|---|
| 1 |  www.reddit.com |
16.3% | – | 1,847,896 | 95 |
| 2 |  www.youtube.com |
15.1% | – | 1,959,325 | 99 |
| 3 |  www.facebook.com |
13.9% | – | 1,705,362 | 100 |
| 4 |  www.instagram.com |
5.9% | – | 568,231 | 100 |
| 5 |  www.quora.com |
5.5% | – | 307,557 | 92 |
| 6 |  www.amazon.com |
5.0% | ▲ 1 | 397,706 | 96 |
| 7 |  www.tiktok.com |
4.8% | ▼ 1 | 479,282 | 97 |
| 8 |  en.wikipedia.org |
3.4% | – | 113,028 | 97 |
| 9 |  www.ebay.com |
1.5% | – | 145,824 | 93 |
| 10 |  www.walmart.com |
1.5% | – | 117,837 | 92 |
| 11 |  www.pinterest.com |
1.4% | – | 146,875 | 97 |
| 12 |  x.com |
1.4% | ▲ 15 | 142,842 | 97 |
| 13 |  www.nytimes.com |
1.2% | – | 12,947 | 94 |
| 14 |  www.forbes.com |
1.1% | ▼ 2 | 21,932 | 94 |
| 15 |  www.justanswer.com |
1.1% | – | 69,286 | 76 |
| 16 |  pmc.ncbi.nlm.nih.gov |
1.1% | ▼ 2 | 51,613 | 95 |
| 17 |  www.consumerreports.org |
1.1% | ▼ 1 | 25,049 | 90 |
| 18 |  www.yelp.com |
1.0% | – | 96,634 | 94 |
| 19 |  www.linkedin.com |
0.9% | ▼ 2 | 62,510 | 99 |
| 20 |  www.tripadvisor.com |
0.9% | ▼ 1 | 102,776 | 93 |
| 21 |  www.homedepot.com |
0.8% | – | 49,966 | 90 |
| 22 |  www.trustpilot.com |
0.8% | ▲ 3 | 36,742 | 94 |
| 23 |  www.kbb.com |
0.8% | – | 56,891 | 89 |
| 24 |  www.healthline.com |
0.7% | ▼ 2 | 10,465 | 92 |
| 25 |  www.edmunds.com |
0.7% | ▲ 1 | 47,862 | 86 |
| 26 |  medium.com |
0.7% | ▼ 6 | 35,011 | 94 |
| 27 |  shop.tiktok.com |
0.7% | ▲ 5 | 44,290 | 97 |
| 28 |  www.caranddriver.com |
0.7% | ▲ 2 | 12,116 | 86 |
| 29 |  www.cnet.com |
0.6% | ▼ 5 | 9,305 | 91 |
| 30 |  www.target.com |
0.6% | ▲ 1 | 39,189 | 91 |
| 31 |  Finance.yahoo.com |
0.6% | ▼ 2 | 27,204 | 94 |
| 32 |  www.bestbuy.com |
0.6% | ▲ 2 | 31,081 | 89 |
| 33 |  www.nerdwallet.com |
0.6% | ▲ 2 | 4,818 | 90 |
| 34 |  www.etsy.com |
0.5% | ▼ 1 | 51,069 | 94 |
| 35 |  www.jdpower.com |
0.5% | ▲ 3 | 33,692 | 87 |
| 36 |  www.cars.com |
0.5% | ▲ 4 | 30,254 | 86 |
| 37 |  www.webmd.com |
0.5% | ▲ 2 | 6,339 | 92 |
| 38 |  www.yahoo.com |
0.5% | ▼ 10 | 26,134 | 94 |
| 39 |  www.thespruce.com |
0.5% | ▼ 3 | 6,345 | 90 |
| 40 |  www.businessinsider.com |
0.5% | ▼ 3 | 9,685 | 92 |
| 41 |  www.sciencedirect.com |
0.4% | – | 24,303 | 94 |
| 42 |  www.pcmag.com |
0.4% | – | 7,063 | 91 |
| 43 |  www.goodrx.com |
0.4% | ▲ 4 | 64,579 | 85 |
| 44 |  www.lemon8-app.com |
0.4% | ▲ 4 | 26,823 | 80 |
| 45 |  www.lowes.com |
0.4% | – | 18,657 | 88 |
| 46 |  play.google.com |
0.4% | NEW | 19,446 | 99 |
| 47 |  www.carfax.com |
0.4% | NEW | 14,559 | 90 |
| 48 |  pubmed.ncbi.nlm.nih.gov |
0.4% | ▼ 5 | 19,180 | 95 |
| 49 |  www.cnn.com |
0.3% | ▼ 3 | 4,863 | 93 |
| 50 |  www.houzz.com |
0.3% | ▼ 1 | 18,277 | 92 |
The numbers come from Ahrefs’ Brand Radar, which tracks AI platforms’ responses to a large, search-powered set of real user queries. For this article, we looked at every domain cited by Grok 1.9 million US queries across all topics, then counted the number of times each domain appeared as a source.
For each website we report:
- Mention sharing – the citations of a domain as a percentage of the summed citations of the 50 most frequently cited sources. It shows how much of Grok’s “source attention” each website captures.
- compared to last month – how the domain’s rank has changed since the last monthly snapshot (▲ increased, ▼ decreased or NEW if it wasn’t in the top 50 last month).
- Pages cited – the number of different pages on the domain cited by Grok, a measure of how extensively the site is referenced rather than how often.
- DR (Domain Rating) — Ahrefs’ 0-100 measurement of a site’s backlink profile strength, included for context on each source’s overall authority.
This article was created and automatically updated every month by Agent Aour AI agent. Every month, the latest Brand Radar data is pulled, mention share and rank movement are recalculated, and the chart and table above are updated – so the numbers always reflect the most current snapshot.
Use Ahrefs’ brand radar to track your brand’s presence in Grok
To track your brand’s presence in Grok, you need to use Ahrefs’ brand radar.
Measure your brand visibility in Grok, look at the specific searches that mention your brand (and those where it is mentioned). not), the pages that mention your brand, and then compare each metric to your closest competition:
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