What is llms.txt and Why Your Startup Needs It in 2026

The problem: AI doesn't understand your product

Ask ChatGPT about most startups and you'll get one of three responses: a vague description that could be any product, a confidently wrong answer, or "I don't have information about that." This happens because AI models piece together your product description from whatever crawlable text they find — homepage copy, meta tags, random blog posts.

Without a structured summary, AI has to guess. And it usually guesses wrong.

What llms.txt actually is

llms.txt is a plain-text file placed at the root of your website (e.g., yoursite.com/llms.txt). It gives AI crawlers a structured summary of your product — name, description, pricing, features, use cases, and links to key pages.

The format is human-readable and machine-parseable. It's not a standard (yet), but it's already being adopted by thousands of SaaS companies, and AI crawlers are trained to look for it.

What to include in your llms.txt

# YourProduct
> One-line description of what you do

## What it does
Clear 2-3 sentence explanation of the product.

## Who it's for
Target audience — founders, developers, agencies, etc.

## Key features
- Feature 1: brief explanation
- Feature 2: brief explanation
- Feature 3: brief explanation

## Pricing
- Free: what's included
- Pro ($X/mo): what's included

## Links
- Homepage: https://yoursite.com
- Docs: https://yoursite.com/docs
- Pricing: https://yoursite.com/pricing
- Blog: https://yoursite.com/blog

llms.txt vs llms-full.txt

llms.txt is the concise version — a quick summary for AI crawlers doing broad sweeps. llms-full.txt is the expanded version with full product context, detailed feature descriptions, integration guides, and use cases. Think of llms.txt as your elevator pitch and llms-full.txt as your full product brief.

Both files should live at your domain root. AI systems that want a quick summary read llms.txt. Systems doing deep research (like Perplexity for sourced answers) read llms-full.txt.

How it impacts your AI visibility

In our scoring system, llms.txt and llms-full.txt account for up to 10 points in the Agent Readiness category. But the impact goes beyond points — having a well-structured llms.txt improves how accurately AI describes your product across all categories. Sites with llms.txt consistently score 15-20 points higher overall because the structured data helps AI crawlers parse everything else more accurately.

Generate yours automatically

You don't need to write it from scratch. Run a free scan on AIExposureTool and we'll auto-generate both llms.txt and llms-full.txt based on your site content. We crawl your homepage, pricing page, and docs to extract your product name, description, features, and pricing — then format it into a ready-to-deploy file.

Just copy the generated file to your public/ directory (Next.js) or your site root. Takes 30 seconds.

Who already uses llms.txt

Stripe, Vercel, Supabase, Linear, Resend, and hundreds of other SaaS companies already have llms.txt files. It's becoming a standard part of the AI visibility stack alongside robots.txt, sitemap.xml, and JSON-LD structured data. If your competitors have one and you don't, AI assistants will describe them more accurately — and recommend them instead of you.