Miva

Miva is a long-standing, fully-hosted e-commerce platform that targets small to mid-sized businesses, particularly in the US, with a strong emphasis on B2B functionality. It offers a high degree of customization through its template language and module system without being open-source. It's known for handling complex product options and attributes well. The platform has modernized with a visual page builder, but can have a steeper learning curve than mainstream SaaS options.

It appeals to established businesses that have outgrown basic builders but don't require the complexity or cost of an enterprise solution like Adobe Commerce, valuing its dedicated support and customizable hosted environment.