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Best Open-Source Alternatives to Notion

Notion is the leading "all-in-one workspace" — docs, wikis, databases, projects. People want OSS alternatives for self-hosting, privacy, no vendor lock-in, and to escape the $10/user/month team plans.

TL;DR — top pick

AppFlowy

AppFlowy is the closest Notion clone in 2026 — same block-based editor, same database views, same drag-and-drop. Built in Rust + Flutter so it's fast on every platform.

github.com/AppFlowy-IO/AppFlowy

All 4 alternatives ranked

#1

AppFlowy

AGPL-3.0Self-hostable★ ~60k
github.com/AppFlowy-IO/AppFlowy

AppFlowy is the closest Notion clone in 2026 — same block-based editor, same database views, same drag-and-drop. Built in Rust + Flutter so it's fast on every platform. Cloud and self-host both supported. The team has been shipping aggressively for 3 years; this is the OSS Notion of choice.

Pick AppFlowy if

You want a near 1:1 Notion replacement with self-hosting and AI features baked in.

Skip if

Your team is deeply embedded in Notion templates and integrations — migration is real work.

#2

AFFiNE

MITSelf-hostable★ ~45k
github.com/toeverything/AFFiNE

AFFiNE merges Notion's block editor with Miro's infinite canvas. Same page can be a doc, a table, or a whiteboard. Local-first by default, sync via your own backend. Best for design + dev teams who want both linear docs and visual workspaces in one tool.

Pick AFFiNE if

You need both Notion-style docs AND Miro-style whiteboards in one tool.

Skip if

You only need docs/databases — AppFlowy is simpler.

#3

Logseq

AGPL-3.0Self-hostable★ ~35k
github.com/logseq/logseq

Logseq is the Roam Research / Obsidian-style outliner — markdown files, bidirectional links, daily journaling, graph view. Not a Notion clone but the right pick if your primary use is personal knowledge management (PKM) over team databases.

Pick Logseq if

You want personal knowledge management with markdown files you own.

Skip if

You need team databases and structured project tracking.

#4

Outline

BSL 1.1Self-hostable★ ~30k
github.com/outline/outline

Outline is the team wiki / docs replacement — clean Markdown editor, hierarchical organization, slash commands. No database views (unlike Notion). Best for documentation-heavy teams who don't need Notion's database features.

Pick Outline if

Your team needs a clean wiki/docs tool without the database complexity.

Skip if

You need database views — pick AppFlowy.

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Best Open-Source Notion Alternatives on GitHub (2026) — AppFlowy & more — StackPicks — StackPicks