# Spike

> Spike is an AI visibility engine: it scans how AI assistants (ChatGPT, Gemini, Perplexity, Claude, Grok, Copilot) answer buyer questions in your category, scores your visibility 0 to 100, and generates the exact code fixes (schema, llms.txt, robots rules, FAQ and comparison pages, plus a pre-rendering fix) that make AI engines recommend you.

Spike is built for B2B SaaS companies whose buyers ask AI assistants what to buy. The scan is free and takes about 90 seconds. Full detail lives at /llms-full.txt.

## Key pages

- [Home](/): What Spike does and the free AI visibility scan
- [Free scan](/scan): Enter your URL to scan your AI visibility
- [Sample report](/r/demo): A live example visibility report
- [Blog](/blog): Research and guides on AI visibility, AEO and GEO

## Guides

- [Answer Engine Optimization (AEO): the complete 2026 guide](/blog/answer-engine-optimization-guide): What AEO is and how to be quoted by AI answer engines.
- [Generative Engine Optimization (GEO) vs SEO](/blog/generative-engine-optimization-vs-seo): How GEO differs from SEO and why you need both.
- [Why ChatGPT can't see your site: the JavaScript rendering problem](/blog/why-ai-cant-see-your-site-javascript): Why AI crawlers that skip JavaScript miss client-rendered sites, and how to fix it.
- [llms.txt: the complete guide](/blog/llms-txt-guide): What goes in an llms.txt file, with a copy-paste template.
- [How to show up in ChatGPT, Perplexity and Gemini answers](/blog/how-to-rank-in-chatgpt-perplexity-gemini): A 7-step playbook to get recommended by AI.
- [How AI assistants decide which brands to recommend](/blog/how-ai-assistants-decide): The mechanics behind AI recommendations.
- [The 7 fixes that make AI cite you](/blog/seven-fixes-ai-citations): The practical AI visibility checklist.

## Product facts

- Free scan: a multi-engine AI visibility score (0 to 100) with a competitor leaderboard and a downloadable Fix Pack, in about 90 seconds.
- The score weights mention rate (how often AI names you), your rank when mentioned, and sentiment. Source control (how much of the cited sources you own) is shown as an opportunity.
- Spike checks whether AI crawlers can even read your site: most AI crawlers (GPTBot, ClaudeBot, PerplexityBot, OAI-SearchBot) fetch raw HTML and do not run JavaScript, so client-rendered sites are invisible to them.
- Fix Pack: nine files pre-filled from the scanned site (llms.txt, llms-full.txt, schema JSON-LD, robots.txt AI rules, FAQ page, comparison page, metadata rewrites, freshness patch, implementation guide), plus a tenth pre-rendering fix when the site is client-rendered.
- Engines covered: Gemini, Llama 3.3 (Groq), Mistral, ChatGPT and Perplexity (search-grounded), plus Claude, Grok, Copilot and DeepSeek modeled from measured signals.