What is Fulcru?
Fulcru is an AI search visibility tool that tracks whether your brand shows up in AI answers from ChatGPT, Gemini, and Perplexity, and helps you write the pages needed to get cited, aimed at marketers and agencies doing generative engine optimization (GEO). You point Fulcru at your brand and it runs the loop: it finds prompts where you are missing from AI answers, shows which competitors are cited instead, reviews the citation sources behind those answers, generates content briefs, and tracks the lift after you publish. It captures real prompts from actual user interfaces rather than APIs, and reports share of voice, sentiment, and model-by-model comparisons. Fulcru is built for agents and multi-client agency work, with a multi-client dashboard, white-labeling, and API access. It also offers a free set of tools for AI-search readiness: checking whether GPTBot, ClaudeBot, and PerplexityBot can reach your site, and generating an llms.txt file from your sitemap, with no account or card required. Paid brand plans start at $50/month. It is best for SEO teams and agencies who want to measure and improve how often their clients get named in AI search results.
What is Fulcru used for?
Best for SEO teams and agencies tracking and improving how often their brand or clients get cited in AI search answers.
How much does Fulcru cost?
Free Tools
Free AI-bot access check and llms.txt generator, plus a free visibility report; no account or card required
Pros and cons
Pros
- Tracks brand visibility across ChatGPT, Gemini, and Perplexity with model-by-model comparison
- Shows which competitors are cited and the citation sources behind AI answers
- Free tools to check GPTBot/ClaudeBot/PerplexityBot access and generate an llms.txt with no account
- Captures real prompts from actual user interfaces rather than APIs
- Multi-client dashboard with white-labeling and API access for agencies
Cons
- Entry paid plan starts at $50/month and scales up quickly for more prompts or brands
- Lower tiers track a single brand with weekly (not daily) refreshes
- AI-answer tracking is an emerging area, so coverage and metrics are still maturing
- Requires content work on your side; the tool surfaces gaps but you still write and publish
Questions about Fulcru
What is Fulcru used for?
Fulcru is used to track and improve AI search visibility. It finds prompts where your brand is missing from ChatGPT, Gemini, and Perplexity answers, shows who is cited instead, and generates content briefs to help you get named.
Is Fulcru free?
Fulcru offers free tools with no account or card, including checks for whether GPTBot, ClaudeBot, and PerplexityBot can reach your site, an llms.txt generator, and a free visibility report. Paid brand plans start at $50/month.
What is an llms.txt and how does Fulcru help?
An llms.txt is a file that tells AI crawlers how to read your site. Fulcru can generate one automatically from your sitemap for free, alongside checking whether major AI bots can access your pages.
Which AI engines does Fulcru track?
Fulcru tracks brand visibility across ChatGPT, Gemini, and Perplexity, reporting share of voice, sentiment, and citation sources, with the same engines available on every paid plan.
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