Alternatives to Obsidian

Local-first markdown knowledge base with plugins

A local-first note app that stores content as plain-text Markdown and offers an extensive plugin ecosystem.

Include proprietary

Joplin

Open-source note-taking and to-dos with sync and encryption

Logseq

Outliner-based knowledge graph on local files

Standard Notes

End-to-end encrypted notes with optional self-hosting

Trilium Notes

Self-hosted hierarchical notes for building large knowledge bases