Angelina YangFounder and Host, TwoSetAI · AI builder for visibility and discoverability

The Training Data Advantage Most AI Companies Don't Have | Alex Beller, Co-founder @Postscript

16 Apr 2026 · 1 min

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In this interview, Alex Beller (Speaker A) explains Postscript's Brand Center, an interface that gives merchants firm control and visibility over AI-generated marketing content, ensuring brand voice consistency. He highlights an infinity testing case with the soap brand Dr. Squatch, where a persona named "Chad" unexpectedly achieved the highest engagement rates. The discussion then moves to the challenges of scaling A/B testing to thousands or tens of thousands of variations, emphasizing the legal risk of sending messages to users who haven't explicitly opted in—costing $1,500 per unsolicited message. Beller stresses that Postscript’s conversation engine embeds these safeguards, turning massive manual sales conversations into automated, compliant, and high‑engagement interactions, which is a major benefit for store owners.

Chapters

They are not going to let a black box AI agent just run. And so with Brand Center, we built an interface where they can curate and have really firm control and visibility into what all the different AI products are creating on their behalf.
How do you maintain this brand voice under the hood?
Do you know Dr. Squatch, the soap brand?
Yeah, the soap.
An interesting thing was happening in their infinity testing program. Their character that sends their text messages, they've named him Chad, like soap and Sasquatches. That's his persona. And those were seeing the highest engagement rates, and that was was like a complete surprise to the merchant.
That's very interesting.
It was definitely a surprise.
For A/B testing, I can think of two messages. But you're testing at a thousand, tens of thousands level. How do you handle that?
This is a huge challenge. The models are really smart, but the brands are only interested in that up to a point. If you send marketing messages to anyone who hasn't explicitly opted in, the liability for those messages is enormous. It's $1,500 per message sent.
That's crazy. Is that a benefit for the store owners to use Postscript because you actually have that baked in your conversation engine?
It's an enormous benefit. We've had millions and millions of manual sales conversations previously.