Papyrus is described as 'simple online editor to create ebooks.You can edit the cover using a simple drag and drop cover editor, import content from the web, or create new content as easily as writing a blog post' and is an website in the News & Books category. There are more than 10 alternatives to Papyrus, not only websites but also apps for a variety of platforms, including Windows, Mac, Linux and Self-Hosted solutions. The best alternative is calibre, which is both free and Open Source. Other great sites and apps similar to Papyrus are Sigil (Free, Open Source), Calibre Web (Free, Open Source), Jutoh (Paid) and BookFusion (Free).
Calibre is a free and open source e-book library management application made by users, for users. Many languages, designed around the concept of the logical book, i.e., a single entry in your library that may correspond to actual e-book files in several formats.
eBook platform focused on openness that provides e-book library management and reader for users to upload & read their e-books across all devices while also allowing businesses and schools to create their own digital library to distribute content.
Papeair is the easy way to create beautiful ebooks in Mobi or Epub format. Simply upload a Word doc, choose a design, preview and download. Papeair's smart algorithm gives you the quality of professional formatting automatically. HOW IT WORKS
Wondershare MePub, a simple yet powerful EPUB creator, can help you build EPUB eBooks from a variety of file formats like MS Word (.doc/.docx), PDF (.pdf), Text (.txt), HTML (.html/.htm), CHM (.chm), and Images (.jpg/.bmp/.png/.tiff/.gif).
Moopato eBook Writer is a desktop tool for writing eBooks with the focus on your writing. It has a minimalist UI for distraction free working. The eBook layout is done with templates and separated from your writing. You can write in markdown.