Mack Grenfell | Trakkr
Mack Grenfell
Founder of Trakkr · Previously Byword
The Journey
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.
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.
Philosophy
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.