A store platform is much more than a theme. It rolls hosting, your product database, payment connections, inventory, billing documents and SEO settings into one system. Shopify and BigCommerce are hosted subscriptions. The vendor takes care of updates and security, and you pay a monthly fee plus charges on some features or transactions.
Open-source options flip that around. WooCommerce, a WordPress plugin, and PrestaShop give you full control of the code with no license fees. In exchange, you need your own hosting, you run the updates, and you'll call on technical help more often. Teams already on WordPress often start here, because woocommerce web design builds on the site they already have.
Three things decide which platform fits. First, catalog size. WooCommerce handles up to about 500 SKUs without strain, while past 5,000 SKUs you should look at Shopify Plus or PrestaShop on a server of its own. Second, how fast you expect traffic to grow. Third, the connections you need, like an order hub for multichannel sales, Amazon and other sales channels, carriers like UPS, FedEx and USPS, or your accounting software such as QuickBooks.
Get this wrong and you'll usually pay for it later with three to six months of migration work. Rather than guess, talk to someone who's already launched stores in your industry. Your first consultation with us is free, and it'll tell you whether a given platform even suits the way you sell.