chatgpt-visibility
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Cheers
Cheers is a Y Combinator (S24) startup building a full-stack Generative Engine Optimization (GEO) platform for local service businesses. It helps HVAC, plumbing, roofing, solar and smart-home companies get recommended by AI assistants like ChatGPT and by Google, by auditing their AI visibility, fixing their web presence, and turning frontline employees into a review engine using NFC tap tools with per-employee attribution.
Mimos
Mimos is a Y Combinator (S25) startup building an Answer Engine Optimization platform that helps regulated companies in health, finance, and legal get cited by AI search engines like ChatGPT, Perplexity, and Gemini. Founded by ex-Microsoft and ex-Amazon engineers Rohit Sirosh and Michael Korovkin, Mimos turns a firm's compliance expertise into an advantage, streamlining the path from insight to compliant, citation-ready content. The company started as a growth and intake system for plaintiff-side law firms before focusing on AI visibility for regulated industries.
Marius Meiners
Marius Meiners is the co-founder and CEO of Peec AI, a Berlin company that tells brands whether ChatGPT, Perplexity, and Gemini mention them - and how. A former top-100 League of Legends player who later worked in venture capital and M&A at PwC before joining Antler's Berlin cohort, he vibe-coded Peec's first prototype in a day and a half with V0 after not writing code for four years, signed eight letters of intent before building the real product, and priced it at 85 euros a month while competitors charged 500-plus. Peec launched in February 2025 and crossed roughly 10 million dollars in annualized revenue about 15 months later, raising about 29 million dollars from investors including Singular, 20VC, and Antler.
AthenaHQ
AthenaHQ is a San Francisco AI-search optimization platform that helps brands see, measure, and improve how they appear inside generative engines like ChatGPT, Perplexity, Claude, and Gemini. Founded in 2025 by ex-Google Search and DeepMind PM Andrew Yan and ex-ServiceNow engineer Alan Yao, the Y Combinator-backed company treats GEO (Generative Engine Optimization) and AEO (Answer Engine Optimization) as the successor to traditional SEO, analyzing millions of AI responses to tell companies whether AI models recommend them - and what to change if they don't.