#1★ TOP PICK
Logseq
A local-first, open-source outliner over plain Markdown.
90
OPEN SOURCEAGPL-3.0SELF-HOSTLOCAL-FIRST
Logseq stores your notes as local Markdown/Org files and builds a networked, block-based knowledge graph on top. It is open-source, privacy-friendly, and yours to back up however you like.
Strengths
- +Plain-text files you own
- +Powerful outlining and backlinks
- +Fully open-source
Trade-offs
- −Outliner model is an adjustment
- −Fewer polished database views than Notion
#2
AppFlowy
The open-source Notion alternative, self-hostable.
85
OPEN SOURCEAGPL-3.0SELF-HOSTLOCAL-FIRST
AppFlowy mirrors Notion's docs-plus-databases model as an open-source app you can run locally or self-host, keeping your data on infrastructure you control.
Strengths
- +Closest feel to Notion
- +Self-hostable backend
- +Active development
Trade-offs
- −Younger than Notion, some gaps
- −Self-hosting takes setup
Free / open-source; optional paid cloud #3
Obsidian
Local Markdown notes with a huge plugin ecosystem.
78
SOURCE-AVAILABLEProprietary (free)LOCAL-FIRST
Obsidian keeps every note as a local Markdown file and layers a powerful linked-notes and plugin ecosystem on top. It is free to use and local-first, though the app itself is closed-source.
Strengths
- +Your notes are plain local Markdown
- +Enormous plugin ecosystem
- +Fast and offline
Trade-offs
- −App is closed-source
- −Official sync is a paid add-on
Free for personal use; paid Sync/Publish optional #4
Anytype
Local-first, end-to-end encrypted knowledge base.
72
SOURCE-AVAILABLESource-availableSELF-HOSTLOCAL-FIRST
Anytype is a local-first, end-to-end encrypted workspace for notes and objects, syncing peer-to-peer. It is source-available rather than fully OSI open-source, but your data stays encrypted and under your control.
Strengths
- +End-to-end encryption
- +Local-first with P2P sync
- +Flexible object model
Trade-offs
- −Source-available, not fully open-source
- −Custom sync model to learn