Neither Shopify Plus nor Magento Open Source offers a free trial.
Shopify Plus is designed for and Large Enterprises.
Magento Open Source is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing details for both Shopify Plus and Magento Open Source are unavailable at this time. Contact the respective providers for more information.
Some top alternatives to Shopify Plus includes Sharetribe, WooCommerce, BigCommerce, Square Ecommerce, Shopify, AmeriCommerce, Ecwid, Salesforce B2C Commerce, Magento Open Source, NetSuite SuiteCommerce, WebCommander and Web.com.
Some top alternatives to Magento Open Source includes WooCommerce, Shopify Plus, BigCommerce, Shopify, AmeriCommerce, Elliot, Quick eSelling, CommerceUp, Purchase Commerce, Adobe Commerce, Web.com and iSeller.