Also strong
PHP/Laravel wiki and documentation platform with books and shelves.
wikidocs
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4 tools match your filters
Honorable mention
Knowledge ops with team authoring (Confluence-class positioning).
wikiconfluence-alt
Also strong
Fast collaborative knowledge base (React/Node) with Slack SSO patterns.
wikicollaboration
Also strong
Open Notion alternative with local-first and sync options.
notion-altwiki