Shopware is available in different editions (https://www.shopware.com/en/pricing/). The Starter Edition and the Community Version are free of charge. For the extension with additional plugins, however, costs may be incurred by the plugins themselves and by agency services to implement the functions.
The Professional Edition costs €199 per month or a one-time fee of €2,495, and the Enterprise Edition costs €2,495 per month or a one-time fee of €39,995.