Alternatives to Notion in 2026

Requarks Wiki requarks

Wiki.js | Next Generation Open Source Wiki

Complete system Production-ready A team wants a polished self-hosted wiki for internal documentation.

★ 29k AGPL-3.0 TypeScript Active, pushed today

Docmost docmost

Docmost is an open-source collaborative wiki and documentation software. It is an open-source alternative to Confluence and Notion.

Complete system Usable A team wants Confluence-style documentation it can self-host on Postgres.

★ 22k AGPL-3.0 TypeScript Active, pushed today

BookStack BookStackApp

NOW MANAGED ON CODEBERG

Complete system Production-ready You want a simple, stable self-hosted documentation wiki that non-technical staff can use.

★ 19k MIT PHP Active, pushed today

DeepWiki-Open AsyncFuncAI

Open Source DeepWiki: AI-Powered Wiki Generator for GitHub/Gitlab/Bitbucket Repositories. Join the discord: https://discord.gg/gMwThUMeme

Developer tool Experimental You want AI-written overview documentation for a codebase you host, using your own model keys or Ollama.

★ 18k MIT Python Active, pushed 5 days ago

Suitenumerique Docs suitenumerique

Docs is an open-source text editor: web-native, made for real-time collaboration, cleanly structured documents and sub-documents with full ownership of your data. Built to scale with Django and React.

Complete system Usable An organisation, especially in the public sector, wants a self-hosted Notion-like editor under its own control.

★ 17k MIT TypeScript Active, pushed today

Quarkdown iamgio

🪐 Markdown with superpowers: from ideas to papers, presentations, websites, books, and knowledge bases.

Developer tool Usable You write papers, books or presentations and want Markdown with LaTeX-like layout control.

★ 16k GPL-3.0 Kotlin Active, pushed yesterday

Claude-obsidian AgriciDaniel

Self-organizing AI second brain for Obsidian + Claude Code. Drop any source and Claude reads, links, and files it into one connected knowledge graph of plain Markdown you own. AI note-taking, personal knowledge management (PKM), and an open-source Notion alternative. Based on Karpathy's LLM Wiki pattern.

Integration Experimental You use Obsidian and Claude Code and want Claude to organise your notes for you.

★ 16k MIT Python Active, pushed 8 days ago

OneDev theonedev

The Unified and Autonomous Development Platform

Complete system Production-ready A team wants an all-in-one GitLab alternative that is lighter to run.

★ 15k MIT Java Active, pushed 2 days ago

PandaWiki chaitin

PandaWiki 是一款 AI 大模型驱动的开源知识库搭建系统，帮助你快速构建智能化的 产品文档、技术文档、FAQ、博客系统，借助大模型的力量为你提供 AI 创作、AI 问答、AI 搜索等能力。

Complete system Usable A Chinese-speaking team wants a self-hosted documentation site with an AI assistant built in.

★ 10k AGPL-3.0 TypeScript Active, pushed 13 days ago

DokuWiki dokuwiki

The DokuWiki Open Source Wiki Engine

Complete system Production-ready You want a low-maintenance wiki that runs on basic PHP hosting and is easy to back up.

★ 4.7k GPL-2.0 PHP Active, pushed 34 days ago

Mapnik mapnik

Mapnik is an open source toolkit for developing mapping applications

Building block Production-ready You render your own map tiles or images from GIS data.

★ 4k LGPL-2.1 C++ Active, pushed today

LLM Wiki Agent SamurAIGPT

A personal knowledge base that builds and maintains itself. Drop in sources — Claude (or Codex/Gemini) reads them, extracts knowledge, and maintains a persistent interlinked wiki. Works with Claude Code, Codex, OpenCode, Gemini CLI. No API key needed.

Developer tool Experimental You already use a coding agent and want it to build a personal knowledge base for you.

★ 3.7k MIT Python Active, pushed today

Obsidian wiki Ar9av

Framework for AI agents to build and maintain a digital brain through Obsidian wiki | Memory System for Agents

Developer tool Experimental You keep notes in Obsidian and want coding agents to read and update them.

★ 3.7k MIT Python Active, pushed today

Gollum gollum

A simple, Git-powered wiki with a local frontend and support for many kinds of markup and content.

Complete system Production-ready You want wiki pages versioned as plain files in Git.

★ 14k MIT Ruby Slowing, pushed 11 months ago

Flatnotes dullage

A self-hosted, database-less note taking web app that utilises a flat folder of markdown files for storage.

Complete system Usable You want simple browser-based notes with files you can open in any editor.

★ 3.3k MIT Vue Active, pushed 2 months ago

MrDoc zmister2016

mrdoc,online document system developed based on python. It is suitable for individuals and small teams to manage documents, wiki, knowledge and notes. 觅思文档，适合于个人和中小型团队的在线文档、AI知识库系统。

Complete system Usable A Chinese-speaking team wants a self-hosted docs and notes system.

★ 3.2k GPL-3.0 JavaScript Active, pushed 2 days ago

Eidos mayneyao

A single-file relational spreadsheet for you and your agent.

Complete system Usable You want Notion-like tables and docs offline in one portable file.

★ 3.2k AGPL-3.0 TypeScript Active, pushed today

Apps-android-wikipedia wikimedia

📱The official Wikipedia app for Android!

Complete system Production-ready You read Wikipedia on Android, or want to study a large, well-run open-source Android codebase.

★ 3.1k Apache-2.0 Kotlin Active, pushed today

Zk zk-org

A plain text note-taking assistant

Developer tool Usable You keep Markdown notes in your terminal editor and want Zettelkasten-style linking and search.

★ 2.9k GPL-3.0 Go Active, pushed 2 days ago

Alexandrie Smaug6739

📚 The open-source, offline-first Notion, Obsidian & Confluence alternative. Advanced Markdown, multi-tenant teams, OIDC/SSO, and local S3 backups. Deploy in one command.

Complete system Usable A small team wants self-hosted notes and wiki pages with a Markdown-first editor.

★ 2.9k MIT Vue Active, pushed 17 days ago

Nlp_chinese_corpus brightmart

大规模中文自然语言处理语料 Large Scale Chinese Corpus for NLP

List, course or other material Usable You train or fine-tune Chinese language models and need pretraining data.

★ 9.9k MIT Slowing, pushed 9 months ago

Llm-wiki-compiler atomicstrata

The knowledge compiler. Raw sources in, interlinked wiki out. Inspired by Karpathy's LLM Wiki pattern.

Developer tool Experimental You want to compile a pile of articles or notes into a browsable knowledge base for yourself or your agents.

★ 2.2k MIT TypeScript Active, pushed 3 days ago

Hexo-theme-stellar xaoxuu

基于 Hexo 的全能个人知识库，开箱即用，内置海量标签和动态数据组件。可用于个人博客、项目文档、知识库、专栏、笔记等。

Template or starter Usable You blog with Hexo and want a theme that also handles documentation and wiki-style pages.

★ 2.1k MIT JavaScript Active, pushed 15 days ago

Ac-Wiki Ac-Wiki

高等教育学社基础知识开源建设工程｜青年大学习

List, course or other material Usable You are a Chinese university student looking for orientation material.

★ 1.9k MIT HTML Active, pushed 5 days ago

Colanode colanode

Open-source and local-first Slack and Notion alternative that puts you in control of your data

Complete system Experimental A small team wants chat and docs together on its own server with offline support.

★ 5.2k Apache-2.0 TypeScript Slowing, pushed 7 months ago

MM-Wiki phachon

MM-Wiki 一个轻量级的企业知识分享与团队协同软件，可用于快速构建企业 Wiki 和团队知识分享平台。部署方便，使用简单，帮助团队构建一个信息共享、文档管理的协作环境。

Complete system Experimental A Chinese-speaking team wants a simple wiki deployable as one binary.

★ 3.8k MIT Go Slowing, pushed 7 months ago

Yoopta-Editor yoopta-editor

Build Notion-like, Craft-like, Coda-like, Medium-like editors with Yoopta

Building block Usable You are adding a block-based editor to a React app.

★ 3.1k MIT TypeScript Slowing, pushed 6 months ago

Raneto ryanlelek

Markdown powered Knowledgebase Wiki for Node.js

Complete system Usable You want a small file-based knowledge base without a database.

★ 2.9k MIT JavaScript Slowing, pushed 8 months ago

Community documize

Modern Confluence alternative designed for internal & external docs, built with Go + EmberJS

Complete system Usable You need a self-hosted documentation tool with approvals and permissions.

★ 2.4k AGPL-3.0 JavaScript Slowing, pushed 6 months ago

Busabase busabase

Open-source database & workspace for AI agents — structured data, durable knowledge, reusable skills, runnable apps, and human review on the writes that matter. Local-first and self-hostable.

Complete system Experimental You run agents that need a shared, auditable data store with people approving changes.

★ 670 MIT TypeScript Active, pushed 2 days ago

Confluence Atlassian

Confluence is your team workspace for creating and sharing knowledge. Use AI to draft, summarize, and find answers so projects move faster.

Complete system Production-ready Your teams already use Jira and need a shared documentation space that links to tickets.

919 readers a month Commercial

Guru Guru Technologies

Stop running your business on confidently wrong AI. Guru structures, governs, and continuously improves your knowledge—so every AI answer can be trusted.

Complete system Production-ready Support or sales teams need accurate, owner-verified answers available where they already work.

Commercial

Slab Slab

Discover why our easy creation, organization, and numerous integrations, make us so popular with non-technical and tech-savvy teams alike.

Complete system Production-ready A small or mid-size team wants a simpler, tidier wiki than Confluence or Notion.

Commercial

Document360 Kovai.co

Start building intelligent documentation today with AI search, AI chatbot, and writing tools inside Document360, the knowledge base trusted by teams worldwide.

Complete system Production-ready A software company needs a branded customer help centre with structured articles and search.

Commercial

GitBook GitBook

GitBook is a knowledge platform that connects your docs, product and users, answers user questions, and identifies knowledge gaps. Docs-as-code support & AI insights included.

Complete system Production-ready A software product team wants polished public docs that engineers can edit through Git and others through the browser.

Commercial