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Lead researcherFounder & CEO, Trakkr

Mack Grenfell

Researching how AI discovers,
evaluates and cites the web.

Original studies on the sources behind AI answers, the crawlers that reach them, and what it means for brand visibility.

Mack Grenfell
AI citations · Crawler behaviour
Cross-model research

Study 012

We Found Our Competitors’ AI Prompt Strategies in Search Console

What structured queries reveal about buyer personas, rivals, markets and evaluation rules.

Study 012 · Published 25 Aug 2026
Search Console data: 18 Apr 2025 to 17 Aug 2026

3,476distinct structured Search Console queries in the conservative set

Exact template matching in authorized Search Console data, with query deduplication and cross-property checks.

Scope: a query fingerprint does not identify the person or team who submitted it.

Read the study

Study 010

Do AI Crawlers Prefer Markdown?

A randomized experiment measuring crawler coverage, retrieval demand and transfer efficiency.

Study 010 · Published 6 May 2026
Page-level assignment to HTML or Markdown

9,035 pages randomized
HTMLMarkdown

Page-level assignment with weekly crawler and live retrieval aggregation. Read the method before interpreting the result.

Read the experiment

All publications

Trakkr Research · 13 studies, newest first

Study 013

Zombie Stats: Where the Numbers AI Quotes Come From

We asked ChatGPT, Perplexity, Gemini, Claude and Google AI Overviews 200 questions that call for a number, then followed every statistic they quoted back to its source. Four in ten reached a study that says the same thing.

Study 012

We Found Our Competitors’ AI Prompt Strategies in Search Console

We decoded 3,476 structured Search Console queries that revealed buyer personas, competitor sets, markets and evaluation rules used in AI visibility tracking.

Study 011

Cited, Not Chosen

An exploratory benchmark separating AI citation from recommendation and measuring how recommendation rates change around a brand page's first observed citation.

Study 010

Do AI Crawlers Prefer Markdown?

Live randomized experiment measuring whether Markdown changes AI crawler coverage, retrieval demand, and transfer efficiency.

Study 009

The Half-Life of AI Citations

Longitudinal citation persistence and visibility volatility benchmark behind the Citation Decay study.

Study 008

The Anatomy of an AI Citation

Benchmark of the content, schema, authorship, and structural traits shared by AI-cited pages.

Study 007

Hidden Prompts in AI Search

Benchmark of websites embedding hidden prompts that attempt to influence AI chatbot citation and memory behavior.

Study 006

AI Crawls Your Product Pages. It Cites Your Blog.

Page-type citation efficiency benchmark cross-referencing AI citations with AI crawler visits.

Study 005

The llms.txt Effect

llms.txt adoption and citation-impact benchmark across AI-cited domains.

Study 004

Same Question, Different AI, Different Answers

Cross-model agreement benchmark showing how often AI systems recommend the same brands for the same prompts.

Study 003

When AI Comes to Your Website

AI crawler behavior benchmark covering traffic share, entry pages, session depth, and revisit patterns.

Study 002

How AI Translates Your Questions

Prompt-to-search-query rewrite benchmark showing how AI systems transform user questions before retrieving sources.

Study 001

Where AI Gets Its Answers

Public AI Citation Index covering 80.8M citation appearances, domain concentration, source categories, prompt intent, and explicit coverage limits.

About Mack

Founder of Trakkr · Previously Byword

2016–2021

Growth marketing

Built and scaled paid acquisition at agencies and in-house. Managed millions in ad spend across social and search. Learned that the best marketing is finding leverage.

2022

Founded Byword

Built an AI writing tool from scratch. Watched it grow organically to 85,000 users. Saw firsthand how AI was reshaping content creation, and realized something bigger was coming.

byword.ai
2025

Founded Trakkr

People started asking ChatGPT for recommendations instead of Googling. AI became the new discovery layer. Trakkr exists to help brands understand this shift: who AI recommends, and why.

trakkr.ai

How Trakkr is built

Independent

No VC, no committees. Just relentless focus on building the best product. That’s why we can move fast.

Bootstrapped

Revenue-funded from day one. Aligned incentives with customers, not investors. Sustainable by design.

Shipping weekly

The AI landscape changes fast. We ship updates weekly while others wait for approvals.

Let’s talk.

Happy to chat about Trakkr, AI visibility, growth marketing, or just say hi.