Cofoundry is described as 'open source .NET Core CMS and application framework focusing on code first development, unobtrusive integration, extensiblity and user friendly content management' and is an website in the Business & Commerce category. There are six alternatives to Cofoundry, not only websites but also apps for Windows, .NET Framework and Self-Hosted solutions. The best alternative is Umbraco, which is free. Other great sites and apps similar to Cofoundry are DNN (Free, Open Source), EPiServer (Paid), Kentico CMS (Freemium) and Orchard (Free, Open Source).
Umbraco is a fully-featured open source content management system with the flexibility to run anything from small campaign or brochure sites right through to complex applications for Fortune 500's and some of the largest media sites in the world.
DNN provides a suite of solutions for creating rich, rewarding online experiences for customers, partners and employees. In addition to our commercial CMS and social community solutions, DNN is the steward of the DotNetNuke Open Source Project.
The only fully integrated ASP.NET CMS, E-commerce, and Online Marketing platform allowing you to create truly optimized digital customer experiences across multiple channels, with GDPR compliance and MVC development fully supported.
Sitecore A/S has produced the Sitecore content management system since 1999. They have a well established portfolio of Solution Partners worldwide and an extensive network of certified Sitecore developers.