Rhys Fisher

Rhys Fisher

Rhys Fisher is the COO & Co-Founder of Rally. He previously co-founded a boutique analytics agency called Unvanity, crossed the Pyrenees coast-to-coast via paraglider, and now watches virtual crowds respond to memes. Follow him on Twitter @virtual_rf

Articles by Rhys Fisher

Showing 1-9 of 20 articles

Examples of How AI Personas React to Reels

Examples of How AI Personas React to Reels

August 05, 2025

Following last week's behind-the-scenes look at our video reaction simulator, here are a few more examples that highlight how AI personas respond to different types of content. From tech commentary to TikTok clips, these simulated reactions offer a glimpse into the diverse ways people engage with Reels.

Simulating Reactions To The Astronomer Ad

Simulating Reactions To The Astronomer Ad

July 29, 2025

Before flying a paraglider 430 kilometers across the Pyrenees, I rehearsed the entire journey in my head using nothing but Google Earth on an iPhone. It changed how I understand preparation forever. That same mindset led me to build a tool that lets you watch how people might react to your message before it matters, turning AI personas into a flight simulator for human empathy.

Can it Predict PMF?

Can it Predict PMF?

June 16, 2025

What if you could test product-market fit before building anything? This experiment shows AI personas can predict real user PMF responses with 88.5% accuracy.

Validating AI Persona Demographics: A Step-by-Step Guide (With Template)

Validating AI Persona Demographics: A Step-by-Step Guide (With Template)

June 10, 2025

This guide shows you how to quickly verify that your AI personas match intended demographic distributions for age, gender, income, location and occupation. Using a ready-to-use Google Colab template. By validating your audience traits up front, you can prevent misleading simulation results and ensure that rapid, cost-effective persona studies yield reliable, actionable insights.

The Leading Question Effect

The Leading Question Effect

June 09, 2025

Leading question can shift public opinion depending on how a question is framed. Using Rally’s synthetic personas, it's now possible to replicate this effect in a controlled experiment, revealing how survey design can manufacture consent or dissent with measurable precision.

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