There isn't one best builder for every small business. The right choice depends on whether design, selling, flexibility, or ease of use matters most to you.
Squarespace: design-focused brands and service businesses that want low maintenance
Wix: flexibility and a large app marketplace
Shopify: stores built mainly around selling physical products
WordPress: custom features and long-term scalability, with more upkeep
Webflow: design-heavy sites that need advanced control
Showit: complete design control, with the blog run separately through Wordpress
A few questions narrow it down quickly. Selling a large catalogue of products points to Shopify. Needing custom features or plugins points to WordPress. Wanting an attractive site with booking, contact forms, and simple selling, without managing hosting, points to Squarespace or Wix.
Before settling on Squarespace, August Cura Studio worked with Showit, Webflow, Shopify for an online shop, and WordPress for an early blog. Squarespace became the base for every August Cura Studio template, chosen for drag-and-drop editing that customers find easy to use, having everything on one platform (eg. blog management) and for accessibility considerations. If Squarespace is on your shortlist, a template made for your industry lets you see the full design before you commit, rather than starting from a blank page.