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PluXml vs Serendipity: catalog facts
PluXml	Serendipity
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the BSD 3-Clause licence.
Self-hosted	Self-hosted
No database required; a site is a folder of XML files Multi-user with five permission levels	Long track record since 2002 Plugin and theme repository installable from the admin
Website and community are mainly in French Small project with a modest plugin and theme selection	Smaller community than WordPress Classic PHP blog design rather than a modern headless setup
Self-hosted	Self-hosted
Open source	Open source
License: GPL-3.0	License: BSD-3-Clause
Not stated if an account is 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 2, 2026	Official website Full listing and sources Checked October 2, 2026

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