Why doesn't my site have opening content for AI answers?

Your site lacks clear opening content that AI systems can extract for direct answers. Add concise, factual opening paragraphs to your main pages. This content should directly answer what your page is about within the first 100 words.

What happens when my llms.txt file returns a 404 error?

Your llms.txt file is missing, returning a 404 error. This file helps AI systems understand how to interact with your content. Create an llms.txt file in your root directory with guidelines for AI crawlers and language models.

How does a missing robots.txt file affect my site's AI visibility?

Your robots.txt file returns a 404 error, making it inaccessible to AI crawlers. This creates uncertainty about crawling permissions. Create a robots.txt file in your root directory to properly guide AI systems and search engines.

Why is having an H1 tag critical for my pages?

Your pages are missing H1 tags, which are essential for both users and search engines. H1 tags provide the main heading structure and help AI systems understand your page topics. Add one clear H1 tag per page.

Should I add FAQ schema markup to my site pages?

Your site has no FAQ schema markup, missing opportunities for rich search results. Add FAQPage structured data to pages with question-and-answer content. This helps search engines display your FAQs directly in search results.

‹ Back to Reports

Andreessen Horowitz SEO & AI Visibility Audit

Andreessen Horowitz is a venture capital firm that invests in technology companies across software, biotech, crypto, and infrastructure. It provides capital, operational support, and strategic guidance to founders building products that reshape industries.

a16z.com

SEO + AEO + E-E-A-T combined

Audited March 12, 2026 · 28 pages analyzed

Overall Scores

Area	Score	Grade
SEO	77%	C
AEO (AI Visibility)	20%	F
E-E-A-T	63%	D
Combined	49%	—

Fastest way to fix your site is to use our Custom Connector for Claude Desktop, or other IDEs.

E-E-A-T Breakdown

Signal	Score	Issue
Trustworthiness	77%	No contact transparency signals detected
Expertise	53%	135 words, 6 headings, 15 outbound links
Authoritativeness	60%	Organization schema, No third-party review or trust signals detected
Experience	34%	Found, Freshness could improve, Found 6 headings, No first-hand experience signals detected

Stobo finds what's broken and generates the fixes

Claude Desktop MCP integration settings showing how to add a custom MCP server

Try these in Claude Desktop

stobo my site: a16z.com

stobo this article: a16z.com/blog/my-article

Generate a robots.txt for a16z.com

stobo my blog: a16z.com/blog

Recommendations

No opening content found AEO
Add a direct answer in the first 40-60 words of the page. AI engines pull from the opening paragraph.
```
stobo this site: a16z.com
```
llms.txt not found (HTTP 404) AEO
Create an llms.txt file so AI models can understand what a16z.com does. Stobo generates one automatically.
```
Generate an llms.txt for a16z.com
```
robots.txt not accessible (HTTP 404) AEO
Update robots.txt to allow AI crawlers like GPTBot and ClaudeBot. Stobo generates an AI-friendly version.
```
Generate a robots.txt for a16z.com
```

Track your score over time

We'll re-audit your site in 7 days and email you what changed. Free, automatic.

Embed your audit badge

Show your score on your README or website.

Markdown

HTML

Frequently asked questions

Why doesn't my site have opening content for AI answers?: Your site lacks clear opening content that AI systems can extract for direct answers. Add concise, factual opening paragraphs to your main pages. This content should directly answer what your page is about within the first 100 words.
What happens when my llms.txt file returns a 404 error?: Your llms.txt file is missing, returning a 404 error. This file helps AI systems understand how to interact with your content. Create an llms.txt file in your root directory with guidelines for AI crawlers and language models.
How does a missing robots.txt file affect my site's AI visibility?: Your robots.txt file returns a 404 error, making it inaccessible to AI crawlers. This creates uncertainty about crawling permissions. Create a robots.txt file in your root directory to properly guide AI systems and search engines.
Why is having an H1 tag critical for my pages?: Your pages are missing H1 tags, which are essential for both users and search engines. H1 tags provide the main heading structure and help AI systems understand your page topics. Add one clear H1 tag per page.
Should I add FAQ schema markup to my site pages?: Your site has no FAQ schema markup, missing opportunities for rich search results. Add FAQPage structured data to pages with question-and-answer content. This helps search engines display your FAQs directly in search results.

Audit a competitor