Discover the websites ChatGPT and Gemini cite as sources
When ChatGPT or Gemini answer a question about your industry, they don't make it up — they cite specific websites. Lumen shows you exactly which sites those are, where you appear, and where citation gaps exist.
Start freeKnow which sites influence AI responses
It's not magic. ChatGPT and Gemini read specific domains to answer. Lumen shows the authority ranking: which sites are cited most, which are gaps.
Prioritize your SEO and PR efforts
If an important authority source doesn't cite you, you know where to focus. Pitch them content, improve your presence there, or build relationships.
Detect citation coverage gaps
You appear on some sources but not others the AI reads. That's a clear PR or SEO opportunity Lumen identifies.
Share of citations per domain
See what percentage of citations on each site belong to you versus your competitors.
We run your prompts
Each daily execution against ChatGPT and Gemini captures the URLs cited in responses.
We extract the domains
We group citations by domain, count how often each appears, and determine whether your brand was cited at that source.
We show the authority ranking
In your dashboard, see a ranking: domains already citing you (celebrate), and domains the AI uses but you're missing (opportunities).
Discover your Authority Sources today
Available on all plans. Identify PR and SEO opportunities.
Start free