Payload CMS is an open-source headless CMS and application framework built on Next.js and TypeScript, code-first and self-hostable, used in production by Microsoft, ASICS, and Blue Origin, and part of Figma since 2026.
Orchard CMS is an open-source .NET content management system from the ASP.NET ecosystem whose modern version, Orchard Core, is built on ASP.NET Core under the BSD-3-Clause license, with 8K+ GitHub stars and 2.4M+ NuGet downloads, ideal for .NET teams building content sites and applications.
Founded by SeMI Technologies in 2019 and headquartered in Amsterdam, Netherlands, Weaviate is a CNCF open-source vector database with native hybrid search, modular AI integration and GraphQL queries, a popular foundation for RAG apps and semantic search.