The best alternatives to StoreBuddy are Star, Gorgias, and Ecommercefolio. If these 3 options don't work for you, we've listed a few more alternatives below.
Gorgias is a help desk (help center or customer support) for Ecommerce stores that allows your customer service team to manage all of your support, customer service in one place. It uses templates, automation, rules, and macros to cut support time.
Airtable Commerce is a starter kit that turns your Airtable database into an e-commerce platform. It comes with customer, order, and product management support, plus the ability to add buy now links to your website in seconds.