There‘s a large proprietary CMS market, mostly Adobe Experience Manager, Sitecore, EpiServer/Optimizely. There‘s also the more recently risen headless/SaaS con

There‘s a large proprietary CMS market, mostly Adobe Experience Manager, Sitecore, EpiServer/Optimizely. There‘s also the more recently risen headless/SaaS content platforms such as Contentful, Sanity, Contentstack, etc. At the bottom end of the market you got Webflow, Wix, and Squarespace. Wordpress and Drupal do compete but the market is not dominated by open source if you look at more than just the count of websites. Similar things are true in commerce. Salesforce Commerce, SAP Commerce, Shopify, BigCommerce, and commercetools are all not open source but very sizable businesses.