How Growth Friday’s Brandwriter Toolmate improved copy quality and speed
Daniel Harman, Founder at Growth Friday
10X
faster web copy
Syntropy turned me from custom GPT-skeptic to believer.
We’d tried generic LLMs before, but they seemed to be always off-brand. Hillary’s brand diagnostic and content engine convinced us otherwise.
She consolidated our voice, tone, and messaging pillars into clear, reusable instructions the custom GPT could actually follow.
Now drafts land on-brand in minutes, revisions are lighter, and our website, social, email, and sales materials sound consistently 'Growth Friday' without hand-holding. It’s the first AI workflow that improved quality and speed at the same time. Strong recommend.
Before
After
THE CHALLENGE
In spring 2025, Daniel Harman pivoted Growth Friday from a small-business SEO agency to an AI-native digital marketing shop serving dentists. New audience, new positioning—and a website that no longer reflected either.
Daniel quickly hit a wall: as the only person who fully understood the new brand identity, every sentence had to flow through him. His team could draft, but nothing sounded right until he rewrote it. He’d become the bottleneck.
Daniel faced a choice: keep paying for rounds of revisions and hope the brand voice eventually stuck, or build a system that could codify it once and scale it everywhere. He chose the system.
Syntropy's Solution
We kicked things off like we do all AI projects: with our human ingenuity and discernment.
Step 1: Brand Diagnostic
We started by understanding what reusable brand assets Growth Friday actually had, and what was missing. Through discovery interviews, competitive analysis, market research, and a content audit, we mapped content gaps, strategic opportunities, and existing brand assets that could be repurposed or needed to be rebuilt from scratch. This phase gave us a complete picture of where the brand stood and what needed to change to support the new positioning.
Step 2: Context Engineering
Next, we translated everything we learned into a system both humans and AI could use reliably. We codified Growth Friday’s new brand voice, audience insights, and best practices into reference documents, style rules, example libraries, and reusable templates.
This became the brand’s single source of truth for copywriting.
Step 3: Custom Brandwriter Toolmate
Only after building that foundation did we configure the toolmate. We drafted custom instructions that tied the AI directly to Growth Friday’s knowledge base—so every output reflected their actual voice, not a generic approximation.
The toolmate became a tool the team could trust because it was trained on their rules, not ours.
Step 1: Brand Diagnostic
We started by understanding what reusable brand assets Growth Friday actually had, and what was missing. Through discovery interviews, competitive analysis, market research, and a content audit, we mapped content gaps, strategic opportunities, and existing brand assets that could be repurposed or needed to be rebuilt from scratch.
This phase gave us a complete picture of where the brand stood and what needed to change to support the new positioning.
Step 2: Context Engineering
Next, we translated everything we learned into a system both humans and AI could use reliably. We codified Growth Friday’s new brand voice, audience insights, and best practices into reference documents, style rules, example libraries, and reusable templates.
This became the brand’s single source of truth for copywriting.
Step 3: Custom Brandwriter Toolmate
Only after building that foundation did we configure the toolmate. We drafted custom instructions that tied the AI directly to Growth Friday’s knowledge base—so every output reflected their actual voice, not a generic approximation.
The toolmate became a tool the team could trust because it was trained on their rules, not ours.