Show HN: Nobie – an Excel-compatible runtime for agents and humans

Nobie, an Excel-compatible runtime for agents and humans, launches with full support for Windows Excel shortcuts, formulas, and cells, prioritizing performance and data privacy by keeping spreadsheets on the user's Mac. It integrates with AI models like Claude, Codex, and Gemini, and uses standard .xlsx files to avoid vendor lock-in.

Every Windows Excel shortcut, preserved. Performance is our main focus. Nobie gets faster week after week. Every formula, every cell, calculated correctly. Fully Excel-compatible. Claude, Codex, Gemini — use the AI you already trust. Your data never leaves your Mac. No proprietary format. Open your files in Excel anytime. Download and start working. That's it. For everything you can do in Excel or Google Sheets. Your spreadsheets never leave your Mac. No servers, no uploads, no exceptions. Claude, Codex, Gemini — your AI connects directly to your spreadsheet. Nothing in between. No vendor lock-in. Your files are always standard .xlsx. Every cell, calculated the same as Excel. No proprietary format. Open in Excel anytime.