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