Who pays for privacy? The real cost of building aligned apps by Lefteris Karapetsas || ESP 2025

Fri, Jan 2, 2026, 12:00 AM

Lefterin Karapetsas, founder of Rotki, explains how whenever something is labeled as free, users pay with their data and how apps that are Aligned with users respect data, dont track, run locally and respect privacy. Then he uses Rotki as a exmaple and showcases many guides and tips for users and builders aswell. Ethereum Privacy Stack is a global privacy summit during Devconnect 2025 bringing together Ethereum builders, protocol maintainers, and advocates. Featuring Vitalik Buterin, Roger Dingledine, Andy Guzman, Polymutex, Ameen Soleimani, and 30+ speakers on 2 stages, celebrating privacy acceleration. Ethereum Privacy Stack: http://eps25.web3privacy.info Organized by Web3Privacy Now & Privacy Stewards of Ethereum Web3Privacy now collective: http://web3privacy.info Privacy Stewards of Ethereum: https://pse.dev/