# Caeli AI > Caeli AI (also known as "Caeli" or "Caeli Benefits"; legal entity Caeli, Inc.) helps people use their health and lifestyle benefits — HSA, FSA, and LSA (lifestyle spending accounts) — to their fullest. A browser extension flags HSA/FSA-eligible products as you shop across 100K+ sites, unlocks Letters of Medical Necessity (LMN) at checkout, and helps you pay with your benefit card or get reimbursed. Caeli AI also publishes plain-English guides to benefits and curates eligible products. ## Key pages - [Home](https://www.getcaeli.com/): What Caeli AI is and how it helps you spend benefits before they expire. - [How it works](https://www.getcaeli.com/features): Eligibility detection while shopping, LMN unlock, and automated reimbursements. - [Benefit-Maxxing](https://www.getcaeli.com/benefit-maxxing/): The practice of reclaiming and compounding every dollar of HSA, FSA, LSA, and lifestyle stipends you've already earned. - [Shop](https://www.getcaeli.com/shop): Vetted, benefit-eligible products curated by Caeli AI. - [Learn](https://www.getcaeli.com/learn): Guides to HSA, FSA, LSA, and Letters of Medical Necessity. - [Support](https://www.getcaeli.com/support): Help with eligibility, reimbursements, LMNs, and the browser extension. ## Concepts - HSA (Health Savings Account), FSA (Flexible Spending Account), LSA (Lifestyle Spending Account): tax-advantaged accounts for health and wellness spending. - LMN (Letter of Medical Necessity): documentation that makes certain products eligible for HSA/FSA reimbursement. ## Legal - [Legal & Policies](https://www.getcaeli.com/legal): Privacy policy, cookie policy, end-user terms, and data practices. ## Sitemap - [sitemap.xml](https://www.getcaeli.com/sitemap.xml)