The Magento brand is currently owned by Adobe, which it acquired in May 2018, so do not be surprised to see the Adobe logo on this website. This vendor provides two distinct platforms: Magento Open Source (previously Magento Community Edition) and Magento Commerce.
Although Magento Open Source is free to download, you have to manually configure everything, including hosting, domain, security, and extensions. In most cases, you will need to hire a development team to help you set up and customize your store. Therefore, the free Magento Open Source turns out to be very expensive as a result. Magento Commerce pricing is based on average annual gross sales revenue. There are five different pricing levels for this platform starting at $22,000/year.
Regarding Magento's architecture, until version 2.3, it was an example of a monolithic ecommerce platform. However, since then, the Magento IT team has broken down the monolith into individual components with the storefront API and GraphQL coverage. Today we can definitely add Magento to the list of the best headless ecommerce platforms.