Zasper Information

Zasper is an IDE for Jupyter notebooks that you run on your own machine. It opens the notebooks and kernels you already have and saves them exactly as Jupyter does. It uses 5× less CPU and 40× less memory than JupyterLab, and the whole app is one 10 MB download for macOS, Linux and Windows. Zasper is agentic. Claude Code, Codex, Gemini CLI or any agent that speaks ACP works in a panel beside your notebook, on your own subscription. It reads cells and outputs, runs code in your live kernel, and every change it makes shows up as a diff you can keep or undo. It is also a full IDE: SQL cells that return pandas DataFrames, any Jupyter kernel (Python, R, Julia and more), Git with cell-by-cell notebook diffs, a terminal, language servers, and runs that keep going when you close the tab. Zasper is free and open source under the AGPL-3.0, with a commercial license for companies that build it into their own products. It has been presented at FOSDEM 2026, IndiaFOSS and The Fifth Elephant, and is supported by Zerodha and FOSS United. Download: zasper.io/downloads Tutorials: zasper.io/tutorials Source: github.com/zasper-io/zasper