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Spider vs WebCatalog: catalog facts
Spider	WebCatalog
Free Free and open source under the GPL-3.0 licence.	Freemium Free to download; accounts are offered on the site for additional features.
Linux	Windows, macOS, Linux, Web, Browser extension
Each web app is sandboxed in its own WebKit instance Titlebar adapts to the site's theme colour	Gives web apps their own windows and dock icons Keeps multiple accounts signed in at once
Built for GNOME on Linux only Uses WebKit, so sites tuned for Chromium may behave differently	Apps are still websites and need a connection to work Pricing details are not clear from the homepage
Downloadable app	Downloadable app, Browser extension
Open source	Closed source
License: GPL-3.0-only	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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