Almost all platforms require a web server with PHP, a familiar opensource scripting language. Although almost all software is developed by English-speaking programmers abroad, there are also many plugin developers around the world. Each platform is actually suitable for a web shop (in the Netherlands). You must have real and list of specific features to make a choice based on the features. On several websites, you can watch demo's from the back end, and you can choose a platform that suits you most.
The separation between SaaS (software as a service) and opensource packages is not so easy to do in practice. Of all the above packages, managed service providers are also present in the market. You then rent such a shop and pay a monthly fee for hosting, management and the like. The amount of support that depends on the amount of products you buy.