Getting charged €7.80 for a pint in Dublin? Matt Cortland turned that pub ripoff into a 3,000-call AI investigation that’s forcing price transparency across Ireland. The 37-year-old AI startup founder knew something was off when his Guinness cost nearly nine bucks—especially after discovering Ireland’s government stopped tracking beer prices back in 2011.
Voice AI Poses as Pub Customer
ElevenLabs technology created “Rachel,” an AI caller indistinguishable from humans to bartenders.
Cortland’s solution reads like a tech thriller: deploy an AI voice agent to systematically call every pub in Ireland. Using ElevenLabs’ voice generation platform, he created “Rachel”—a Northern Irish-accented AI inspired by Rachel Duffy from The Traitors UK. The digital caller worked through thousands of pubs, casually asking bartenders for pint prices like any potential customer checking before heading out.
The transcripts reveal Rachel’s effectiveness. Bartenders at spots like Doogies in Enniskillen and Malzards Pub in Kilkenny engaged naturally, offering banter and recommendations without detecting they were talking to software. This wasn’t robocalling—it was conversational AI that passed the pub test.
Data Reveals Massive Price Disparities
Guinndex.ai exposes average €6.01 price with extremes reaching €11 per pint.
Anthropic’s Claude processed the call transcripts into structured data, powering Guinndex.ai—a live, crowdsourced index of Guinness prices across Ireland. The results vindicated Cortland’s suspicions: average pint price hits €6.01 ($6.88), most commonly €5.50 ($6.30), but some pubs charge up to €11. His Dublin experience wasn’t just expensive—it was highway robbery.
The tool’s already forcing market corrections. One pub owner checked Guinndex, realized they were overcharging, and immediately dropped their price by €0.40. That’s consumer AI delivering real savings, not just Silicon Valley promises.
Blueprint for Global Price Transparency
Success in Ireland proves scalable model for any opaque pricing market.
Cortland’s next targets? U.S. prescription drugs and NYC pizza prices—markets where price opacity costs consumers billions annually. “I pulled the thread, and I just kept pulling the thread, and here we are,” he explains. This isn’t just about beer; it’s about democratizing price transparency in any industry that keeps consumers guessing.
Voice AI just proved it can infiltrate information asymmetries at scale, giving you the market data that businesses hoard. Your next price comparison tool might sound exactly like your neighbor.
