LaunchStack

AI-powered StartUp Accelerator Engine built with Next.js, LangChain, PostgreSQL + pgvector. Upload, organize, and chat with documents. Includes predictive missing-document detection, role-based workflows, and page-level insight extraction. Maintained by Deodat-Lawson on GitHub, where it has earned 886 stars from the community.

It's actively developed around langchain, nextjs, openai, and is a solid reference for anyone building with these tools.