# Who makes XEO Agent?

> XEO Agent is built by Limestone Labs LLC, a small software company that makes local-first tools. XEO Agent audits web pages for search, answer-engine, and AI-citation readiness on the user's own computer. The company can be reached at hello@limestonelabs.io.

Last updated: 2026-09-08. Published by Limestone Labs LLC at https://xeoagent.com/about/.

## What does Limestone Labs LLC do?

Limestone Labs LLC builds custom software and local-first tools. Local-first means the application does its work on the user's computer and keeps the user's data there. XEO Agent is the company's public product.

## What is XEO Agent?

XEO Agent is a desktop app for macOS 11 or later on Apple Silicon and Windows 10 or later on x64. It fetches the HTML a server sends for a page, scores that HTML for SEO, AEO, and GEO using a deterministic rubric, and stores the evidence in a SQLite database on the user's machine. Page audits and site crawls are free and require no account.

## How is user data handled?

Audit HTML, scores, and findings never leave the device. The marketing site at xeoagent.com sets no cookies and runs no analytics or advertising pixels. Details are in the [privacy policy](/privacy.html), [cookie policy](/cookies.html), and [terms of service](/terms.html).

## Where can you find XEO Agent?

- Website: [xeoagent.com](/)
- Downloads: [xeoagent.com/download/](/download/)
- Company: [limestonelabs.io](https://limestonelabs.io)
- Email: [hello@limestonelabs.io](mailto:hello@limestonelabs.io)

## Frequently asked questions

### Is Limestone Labs LLC related to other companies named Limestone Labs?

No. Limestone Labs LLC, the maker of XEO Agent, is an independent software company. It is not affiliated with other organizations that share the name, including any medical-device or laboratory businesses.

### How do I contact Limestone Labs about XEO Agent?

Email hello@limestonelabs.io.