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szurubooru vs Hydrus Network: catalog facts
szurubooru	Hydrus Network
Free Free and open source to host yourself.	Free Free, with source published on GitHub.
Self-hosted	Windows, macOS, Linux, Self-hosted
Tag-based search across a personal image collection Runs on your own server, so images stay private	Tag-based search across very large collections Imports files and tags from disk and websites
Requires a server and setup work Aimed at tagging rather than phone photo backup	Takes time to learn compared with ordinary photo libraries Interface is dense and built for power users
Self-hosted	Downloadable app, Self-hosted
Open source	Closed source
License: GPL-3.0	License: WTFPL
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 24, 2026

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