Calibre-Web vs Thorium Reader

Calibre-Web is a web app for browsing, reading, and downloading eBooks stored in a Calibre database. Its library tools include advanced search and filtering, custom shelves, metadata editing, and plugin-based metadata downloads. It supports in-browser reading for multiple formats and accepts uploads in various formats, including audio. An OPDS feed lets reader apps access the library, and a one-click option sends eBooks to e-readers. Kobo devices can sync with the library when the optional Kepubify tool is installed. Administrators can manage users and per-user permissions, restrict downloads for logged-in users, allow public registration, and hide content by category. Authentication options include LDAP, Google and GitHub OAuth, and proxy authentication. The project is GPL v3 licensed and free. Supported platforms are web, Windows, macOS, Linux, and self-hosted deployments. The README recommends pip installation in a Python virtual environment and also links to pre-built LinuxServer Docker images for x64 and aarch64.

Thorium Reader is a free reader and library for ebooks, audiobooks, comics, manga, and documents. It runs on Windows, macOS, Linux, iOS, and iPadOS, with minimum versions listed by the maker. Supported material includes EPUB 2/3, fixed-layout EPUB, PDF, DAISY, Web Publications, audiobook formats such as MP3 and FLAC, and comics in CBZ, EPUB, or PDF. The app opens DRM-free publications and Readium LCP-protected titles from compatible retailers or libraries. Downloaded items work offline, although LCP files need an online connection at least once. Readers can change text size, themes, spacing, and fonts, and use keyboard navigation with custom shortcuts. Accessibility support includes JAWS, NVDA, Narrator, and VoiceOver; the iOS statement notes VoiceOver limitations for EPUB and PDF reading. Desktop users can browse OPDS catalogs when providers allow it. EDRLab develops Thorium Reader, and support is offered through a Help Desk and Discord.