Relixir
Relixir is a YC Spring 2025 (P25) company. Based in San Francisco, CA, USA. Team of 4.
About Relixir
Summary
Relixir builds an autonomous generative engine optimization (GEO) platform for B2B companies that want their brand cited when buyers search on ChatGPT, Perplexity, Claude, and Google AI Overviews. Its AI agent, Rex, produces and refreshes structured content, builds domain authority through automated backlink outreach, and tracks which prospects convert after encountering a brand mention in an AI response. It replaces the manual work of SEO content teams and traditional search optimization workflows.
Business model
Subscription with a cancel-anytime plan billed per autonomous GEO employee (Rex)
Go-to-market
Self-serve: B2B marketing and growth teams sign up directly, connect their existing CMS, analytics, and CRM tools in one click, and activate Rex without a sales process.
From the Y Combinator listing
Growth Engine for AI Search
Relixir is the Growth Engine for AI Search. We turn ChatGPT mentions into direct revenue. Over 1B people now use AI search every week to buy products. Relixir creates GEO content that gets cited in AI responses, ensuring your company never misses a search query from prospects. Then tracks exactly which prospects convert to your site. Customers include 100+ fastest growing companies like Rippling, Airwallex, Retell AI, HackerRank, etc.
Facts
- B2B / B2B
- San Francisco, CA, USA
- 4
- Active
- Early
Founders (2)
- Dennis Zax
- Sean Dorje
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