MuPDF is a free and open-source software framework written in C that implements a PDF, XPS, and EPUB parsing and rendering engine. It is used primarily to render pages into bitmaps, but also provides support for other operations such as searching and listing the table of contents and hyperlinks. Developed by Artifex Software, Inc.
License: Open Source
Kami is a feature-rich PDF annotation and collaboration tool, ideal for educational purposes, while MuPDF is a lightweight PDF viewer and editor focused on performance and advanced features. Users seeking cloud integration and collaboration should opt for Kami, whereas those needing robust editing capabilities may prefer MuPDF.