# MarStack

> MarStack is a marketing data agency in Reston, Virginia. It fixes broken GA4, Google Tag Manager, and HubSpot data, builds conversion-ready websites, and helps businesses get named, cited, and recommended in AI answer engines.

MarStack is not a traditional SEO shop. Core work is marketing measurement (GA4, GTM, HubSpot, BigQuery, lead attribution) plus Answer Engine Optimization (AEO).

AEO is how a business gets named, cited, and recommended in ChatGPT, Claude, Gemini, Perplexity, and Google AI Overviews. It is optimization for AI-generated answers, not blue-link rankings.

An AI Readiness Audit is MarStack’s free practical AEO scan. It scores how likely AI systems are to understand, trust, cite, and recommend a business. MarStack Signals tracks whether AI actually mentions and cites a brand, including local and category prompts.

MarStack serves businesses and marketing agencies. Local market: Reston, Fairfax, Arlington, Tysons, Northern Virginia, and the Washington DC metro area.

Canonical site: https://www.marstack.com/
Product app: https://app.marstack.com/
Contact: https://app.marstack.com/contact?topic=general&subject=Book%20a%20discovery%20call

## Pages

- [MarStack home](https://www.marstack.com/): Marketing data agency overview — tracking, attribution, AEO, and websites
- [Answer Engine Optimization (AEO)](https://www.marstack.com/aeo.html): What AEO is, how it differs from SEO, and MarStack Signals
- [MarStack Signals vs Yoast AI Brand Insights](https://www.marstack.com/marstack-signals-vs-yoast.html): Weekly brand monitoring vs local AEO, site citations, and a managed program
- [MarStack Signals vs HubSpot AEO](https://www.marstack.com/marstack-signals-vs-hubspot-aeo.html): HubSpot’s AI-visibility dashboard vs five engines, local prompts, and executed AEO work
- [AI Readiness Audit](https://www.marstack.com/ai-readiness-audit.html): Free AEO scan plus expert AI readiness services
- [AI Visibility Snapshot](https://www.marstack.com/ai-visibility.html): See who ChatGPT, Claude, Gemini, Perplexity, and Google AI Overviews recommend in an industry and city
- [Lead attribution](https://www.marstack.com/lead-attribution.html): Fix GA4 vs HubSpot mismatches and Direct traffic that hides real lead sources
- [Websites and apps](https://www.marstack.com/websites-and-apps.html): Conversion-ready sites with GA4, GTM, and HubSpot tracking built in
- [For businesses](https://www.marstack.com/businesses.html): Marketing data help for owners and in-house teams
- [For agencies](https://www.marstack.com/agencies.html): White-label tracking, attribution, and reporting partner
- [Northern Virginia](https://www.marstack.com/northern-virginia.html): Reston-based marketing data agency serving NoVA and DC metro
- [Marketing Stack Manager](https://www.marstack.com/marketing-stack-manager.html): Free tool to map martech tools, cost, and gaps
- [Marketing tech stack template](https://www.marstack.com/marketing-tech-stack-template.html): Free template for CRM, CMS, analytics, ads, and automation

## Tools

- [Run free AI Readiness Audit](https://app.marstack.com/base/site-audit?init=ai): Scan a website for AEO signals
- [Full site audit](https://app.marstack.com/base/site-audit): Broader site audit
- [AI Visibility](https://app.marstack.com/base/ai-visibility): Track who AI engines recommend
- [Stack Manager](https://app.marstack.com/stack-manager): Map and manage the marketing tech stack
- [Book a discovery call](https://app.marstack.com/contact?topic=general&subject=Book%20a%20discovery%20call): Contact MarStack

## Optional

- [AEOfor](https://www.aeofor.com/): Industry-focused AEO splash site powered by MarStack
- [AEOfor llms.txt](https://www.aeofor.com/llms.txt): LLM content map for AEOfor
- [Privacy policy](https://app.marstack.com/platform-privacy-policy)
- [Terms of service](https://app.marstack.com/platform-terms-of-service)
- [Sitemap](https://www.marstack.com/sitemap.xml)
- [llms.txt specification](https://llmstxt.org/): Format this file follows