How to get AI to write copy in your brand voice — from picking the right platform to training your GPT
When generative AI first came out, I was skeptical. While it came up with some good ideas, I saw it more as a novelty than a real copywriting tool. Honestly, I didn’t believe “great” and “on-brand AI copywriting” would ever belong in the same sentence.
To be clear, I still see my own brain and approach as a competitive advantage. That hasn’t changed, but two things have shifted:
- First, AI algorithms have become more advanced and intuitive, making it easier to get better output.
- Second, I’ve learned how to train AI tools in my voice and perspective consistently enough that they can now produce strong first drafts that actually sound like me.
And, I’ve found the biggest shift by thinking of myself as a copy chief and AI as a junior writer. It has fantastic ideas but needs strong guardrails, constant feedback, and clear direction. And, I’m going to show you how.
Table of Contents
Picking the Right AI Platform
For starters, I don’t believe that there is a single “best” AI platform for copywriting. It really comes down to personal preference.
ChatGPT was the clear winner among the people I spoke with for this article, with Claude and DeepSeek close behind.
If you’re already using HubSpot, Breeze AI and AI Content Assistant now includes brand voice capabilities too. The tool can help your team stay consistent across emails, blogs, and landing pages directly inside your marketing workflows.
Personally, I prefer ChatGPT. It’s where I’ve spent the most time, I’m comfortable with the platform, and most importantly, I know how to engineer prompts and give feedback that gets good results. Plus, since I’m already paying for it, it makes sense to focus there.
If you haven’t played around with AI much yet, I highly recommend experimenting. Take a few different platforms, feed each the same prompts, and see what comes back.
Pay attention to:
- How intuitive the platform feels to you.
- How easily it “hears” and adapts to your feedback.
- How well the output matches your expectations.
Based on the responses, the user experience, and how well each one fits as your copywriting assistant, you can pick your go-to.
And remember, you don’t have to commit to just one. Several copywriters and strategists I spoke with use different platforms depending on the project.
Training an AI Platform
The first thing you need to know about training an AI platform is that you can’t just say “write like me” without any context.
It’s a garbage-in, garbage-out kind of thing, and it’s on you to set it up for success.
So if you really want your generative AI platform to write like you, you have to teach it your voice and give …read more
Source:: HubSpot Blog
