Litmus
The Lighthouse for AI search visibility
Litmus launched on August 3, 2026 with 8 votes, #1,241 of 23,274 launches that month and more than 90% of that year's launches.
What it does
The Lighthouse for AI search. Litmus scores how visible your site is to ChatGPT, Perplexity and AI Overviews. Unlike tools that just ask an LLM to grade your site (different answer every time you ask), Litmus is fully rule based and deterministic, same input, same score, always. It also tells you exactly what to fix and how to fix it. You can fix it with AI or sell the solution to clients.
The Lighthouse for AI search. Score how visible your site is to ChatGPT and AI Overviews — fix it, or resell the report. Deterministic, no API calls.
ChatGPT, Perplexity, and AI Overviews only cite what they can parse. Drop in a URL and get a score across 6 dimensions, plus a fix brief. Run it yourself, or send it to a client as a report. No API calls. One per line or comma-separated. Adds a content gap + comparison analysis vs these sites. Leave blank to skip. One loop on stage at a time. Click a step, or let it play through. 4a and 4b are the same moment, shown two ways: DIY buyer vs. reseller. One credit runs one scan. Any number of pages, competitor comparisons included. Rescan the same site twice for free. The 3rd rescan (then 6th, 9th…) bills like a new scan. Scan your site, export the report, and hand your dev (or Claude, ChatGPT,…from litmus.aivirex.in
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