Compare software

Flow vs EPUBReader: catalog facts
Flow	EPUBReader
Free Free and open source; self-hosting costs only your own server.	Free Free to install.
Web, Self-hosted	Browser extension
Reads EPUB files directly in the browser Docker and docker-compose files for self-hosting	Works in Firefox, Chrome, Opera and Edge Opens books in place without copying them
Focused on EPUB rather than a wide range of formats Self-hosting requires running a server	Does not open DRM-protected ebooks Read-aloud needs a separate extension
Web application, Self-hosted	Browser extension
Open source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.