Pandoc is a free and open-source software document converter, widely used as a writing tool and as a basis for publishing workflows. Developed by John MacFarlane
License: Open Source
Sigil is primarily focused on creating and editing ebooks with a user-friendly interface, ideal for authors and publishers. In contrast, Pandoc is a versatile document converter that excels in handling a wide range of formats, making it suitable for academics and technical writers.