fastpyxl is an open-source Python library designed as a high-performance, statically typed alternative to openpyxl for reading and writing Excel 2010 xlsx/xlsm files. It offers a drop-in replacement API, making it easy for developers to switch and benefit from improved speed and efficiency.
fastpyxl is an Infrastructure & Backend product. Efficiently reading and writing Excel files in Python with better performance than openpyxl. It is built as an open-source project for python developers and data engineers. fastpyxl is open source under the MIT license. The product ships for the web and the command line, and it can be self-hosted.
It is developed by Christopher C. Smith, and the product first shipped in 2026. PulseGate's similarity index finds few close equivalents — fastpyxl occupies a relatively distinct niche. Key capabilities include Read Excel files, Write Excel files, and high performance.
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