Installing the portable version of Kingsoft Office is relatively easy through its wizard installation style. The free version only comes with 3 components which is Writer (Word), Presentation (PowerPoint) and Spreadsheets (Excel) which should be sufficient for most common office document usage. If you are experiencing compatibility problems with LibreOffice, Kingsoft Office Suite would probably be a better choice because it claims to have the highest level of compatibility with Microsoft Office. There is a shortcut for every components but you can also run the LibreOfficePortable.exe where you get a window with a selection of the components to run. All you need to do is download the installer, run it and extract it to any location on your hard drive or to a USB flash drive.

Installing LibreOffice portable is really easy.

The portable version of LibreOffice contains Writer (Word), Calc (Excel), Draw (Visio), Impress (PowerPoint), Base (Access) and Math. Unlike other free office suites, LibreOffice even provides an official portable version directly from their website instead of taking the risk in downloading from unknown or untrustworthy sources.

LibreOffice is free and is based on OpenOffice that is compatible with files created from Microsoft Office which makes it a great alternative.

Excel 2019 portable