Void is an open-source alternative to Cursor AI code editor, currently in beta and backed by Y Combinator. It's a VS Code fork that allows developers to use their own AI API keys (OpenAI, Anthropic, etc.) instead of paying subscription fees. The editor supports features like tab completion, quick edit, and chat, and can even work with privately hosted LLMs for complete independence. With 28,000 GitHub stars in under a year and 46 contributors, the project is gaining significant traction despite missing some advanced features like planning that Cursor offers.