Frenzy vs PrestaShop: What are the differences?
Developers describe Frenzy as "Sell to the most loyal customers in a new way (by Shopify)". Frenzy is built on Shopify’s highly scalable platform so you can sleep easy knowing your customers will always have a fast, enjoyable experience. Whether it’s a big flash sale, Black Friday or just the normal high order volume of your successful store, we want your business to succeed. On the other hand, PrestaShop is detailed as "Free, Open Source eCommerce Solution powering 185,000 active stores worldwide". PrestaShop is written in PHP, is highly customizable, supports all the major payment services, is translated in many languages and localized for many countries, and is fully responsive (both front- and back-office).
Frenzy and PrestaShop can be primarily classified as "Ecommerce" tools.
PrestaShop is an open source tool with 3.8K GitHub stars and 3.24K GitHub forks. Here's a link to PrestaShop's open source repository on GitHub.