Best Self-hosted Alternatives to Slab

AppFlowy is an open-source, privacy-focused collaborative workspace designed as an alternative to Notion. It combines rich documents, databases, boards, and AI-assisted tools across desktop, mobile, and web clients while keeping a local-first data model.

Key Features

• Rich editor with many block/content types (code blocks, equations, embeds, toggles) and customizable templates
• Database views: grid, board (kanban), calendar and custom views for structured data
• Hybrid architecture: Flutter-based native clients and a Rust core handling business logic and persistence
• Local-first storage using SQLite plus CRDT-based collaboration layers and optional cloud sync
• Built-in AI features (AI chat and writers) with support for local and external models and model selection
• Cross-platform distribution: native macOS, Windows, Linux, iOS and Android clients; web client for browser access
• Extensible plugin and template ecosystem with community-contributed Flutter packages and editor plugins

Use Cases

• Personal knowledge management and note-taking with structured databases and rich content
• Team collaboration for project documentation, shared wikis, and kanban-based task tracking
• Publishing documentation or lightweight sites and using AI to generate summaries, drafts, or takeaways

Limitations and Considerations

• Feature parity with established commercial products is still evolving; some advanced Notion features may be missing or in-progress
• Web deployment and self-hosted web setup can require configuration (CORS, environment variables) and has had community-reported friction during installation
• Commercial/cloud features and enterprise-grade services are shipped separately (cloud offerings and paid tiers); community and plugin ecosystems are active but still maturing

AppFlowy is best suited for users who want control over their data, cross-device native experiences, and an open-source, extensible workspace. It is actively developed with a thriving community, and feature coverage continues to expand through releases and community contributions.

Docusaurus is an open source tool for building documentation and project websites. It turns Markdown/MDX content into a static site and provides a React-based framework to customize layouts and extend functionality.

Key Features

• Docs and blog content authored in Markdown and MDX (with embedded React components)
• Built-in documentation versioning to keep multiple product versions in sync
• Internationalization (i18n) support for localized documentation sites
• Pluggable architecture with themes and plugins for extensibility
• Static HTML output suitable for simple hosting and deployments
• Search integration support (commonly used with external doc-search providers)

Use Cases

• Product and API documentation portals for open source or internal projects
• Versioned release documentation for libraries, SDKs, and platforms
• Lightweight project websites that combine docs, blog posts, and landing pages

Docusaurus is a strong fit when you want content-first docs with modern UI customization via React, while still generating a fast static website that is easy to deploy and maintain.

AFFiNE is an open-source, local-first knowledge OS that combines documents, whiteboards and multi-view databases into a single hyper-fused workspace. It offers cross-platform clients (web, desktop, mobile) and real-time collaboration while emphasizing privacy and self-hosting options.

Key Features

• Unified canvas merging rich text, visual whiteboards and multi-view databases into one editable space.
• Multimodal AI assistant for writing, drawing, summarization, slide generation and brainstorming.
• Local-first storage and real-time synchronization for collaborative editing across clients.
• Cross-platform distribution with desktop (Electron-based) apps and mobile clients, plus a web demo.
• Built on a polyglot stack including TypeScript frontends, Rust-based data engine (OctoBase/Cargo toolchain), CRDT sync foundations and modern frontend tooling.

Use Cases

• Team knowledge bases and product wikis that need rich visual boards and structured databases in one workspace.
• Design and ideation sessions combining freeform whiteboarding with embedded documents and assets.
• Personal and team note-taking with templates, real-time collaboration and local-first data ownership.

Limitations and Considerations

• Plugin/third-party block ecosystem is still maturing; a more extensive plugin marketplace and third-party block ecosystem is planned but not yet fully available.
• An Enterprise Edition is referenced as forthcoming; some enterprise features (SSO, advanced admin/audit) are not yet published in the Community Edition.

AFFiNE targets users who want a privacy-focused, extensible alternative to siloed doc and whiteboard tools. It is suitable for individuals and teams that prefer self-hosting, local-first storage and a single hyper-fused workspace for creative and structured work.

Memos is an open-source, privacy-first note-taking service designed for capturing short notes and building a lightweight knowledge base. It is built for fast, local-first writing, with your data stored on your own infrastructure and no built-in tracking.

Key Features

• Markdown-first editor with plain-text oriented storage
• Fast, minimal UI optimized for quick capture and retrieval
• Organize notes with tags and basic structuring for knowledge management
• Share and publish selected notes for others to view
• REST and gRPC APIs for integrating with developer workflows
• Multiple database options, including SQLite, MySQL, and PostgreSQL
• Simple deployment options including Docker, prebuilt binaries, and Kubernetes

Use Cases

• Personal “memo hub” for daily notes, journaling, and quick idea capture
• Team wiki or lightweight internal knowledge base
• Developer logbook for snippets, debugging notes, and infrastructure runbooks

Memos is a good fit when you want a fast, distraction-free notes app that is easy to run and maintain, while keeping full control over your data. Its API access and simple deployment make it practical for both individuals and small teams.

Plane is an open-source project management platform for planning, tracking, and organizing work across teams. It combines issue/work-item tracking, planning cycles, and an integrated knowledge/wiki system in a single product.

Key Features

• Work items with rich text editor, file uploads, sub-properties and relations for detailed issue tracking.
• Cycles (sprints) with burn-down charts and progress tracking.
• Pages and wiki-style knowledge management with AI-assisted content features.
• Custom views, saved filters, modules, and timeline/dependency planning for flexible workflows.
• Analytics and dashboards to visualize trends and team performance.
• Native importers and integrations (GitHub, GitLab, Slack, Sentry, CSV, Jira, Linear, Notion and others).
• Cloud offering (Plane Cloud) plus self-hosted options with Docker/Kubernetes deployment manifests.

Use Cases

• Product and engineering teams managing feature work, bugs, epics and release cycles.
• Organizations combining project planning with internal documentation and knowledge bases.
• Teams that need flexible views and analytics to track velocity, blockers, and timelines.

Limitations and Considerations

• Plane is licensed under AGPL-3.0; this copyleft license can have implications for how modified versions are redistributed or offered as a service.
• Some advanced features (for example Plane AI and AI credit mechanics) are surfaced via Plane Cloud and may depend on the cloud offering rather than core on-prem capabilities.
• Production deployments require standard infrastructure components (PostgreSQL, Redis, etc.) and appropriate scaling/configuration for larger teams; plan for those operational needs when self-hosting.

Plane provides a modern, integrated approach to project and knowledge management with both cloud and self-hosted deployment choices. It is suitable for teams that want an open-source alternative to commercial PM tools while retaining extensibility and integration options.

SiYuan is a privacy-focused, open-source personal knowledge management application that organizes content as editable blocks and supports Markdown WYSIWYG. It emphasizes local-first storage with optional end-to-end encrypted synchronization and offers desktop, mobile and Docker deployments.

Key Features

• Block-based editor with block-level references and two-way links for fine-grained connections.
• Markdown WYSIWYG editing plus large-document (million-word) editing with dynamic loading.
• Built-in database/table view, SQL query embeds and template/snippet support.
• Spaced-repetition flashcards and AI-assisted writing/Q&A via external model APIs.
• OCR support (Tesseract), PDF annotation linking and rich embeds (charts, flowcharts, math).
• Multiple sync options including end-to-end encrypted sync, S3 and WebDAV backends, and Docker deployment.

Use Cases

• Personal knowledge management and research notes with block-level linking for networked thought.
• Publishing and documentation workflows where notes are exported to standard Markdown, HTML or platform-targeted formats.
• Shared team knowledge bases or a self-hosted notes server accessible via Docker and mobile/desktop clients.

Limitations and Considerations

• Some member-only features require payment; the project notes that some capabilities are gated for paid members.
• Community discussions and repository issues have raised concerns about telemetry defaults and the need for careful plugin vetting; administrators should review telemetry and plugin settings for privacy-sensitive deployments.

SiYuan combines a block-first editor model with server-backed features (Docker, APIs, sync) and desktop/mobile clients, making it suitable for users who want a privacy-oriented, extensible PKM system. Its active open-source repository and plugin ecosystem support customization, but administrators should review paid-feature gating and telemetry settings before production use.

Wiki.js is a modern, lightweight wiki application designed for internal documentation, knowledge bases, and team collaboration. It focuses on modular extensibility, strong access controls, and flexible deployment options.

Key Features

• Markdown-based content editing with rich formatting and media support
• Modular architecture with many optional integrations (auth, search, storage, logging, rendering)
• Extensive administration interface for managing content, users, and settings
• Flexible access control for public, private, or mixed wikis
• Multiple authentication options including local auth and enterprise integrations (LDAP, SAML, OAuth2/OIDC)
• Two-factor authentication support for compatible authentication modules
• Compatible with multiple SQL databases (PostgreSQL, MySQL/MariaDB, Microsoft SQL Server, SQLite)

Use Cases

• Team knowledge base for processes, runbooks, and internal documentation
• Product and engineering documentation portal with structured pages
• Company intranet wiki with SSO-backed access control

Limitations and Considerations

• Some advanced capabilities depend on enabling and configuring specific modules and external services
• Database and authentication feature availability can vary depending on the selected backend and provider

Wiki.js is a solid choice for organizations that want a fast, customizable wiki with strong administration and authentication flexibility. Its modular design makes it suitable for both small private wikis and larger documentation hubs.

MkDocs is a static site generator focused on building project documentation. It converts Markdown source files into a themed HTML site using a single YAML configuration file, and includes a built-in development server for fast preview while you write.

Key Features

• Builds static HTML documentation sites from Markdown
• Simple YAML configuration for navigation, theme settings, and build options
• Built-in development server with live preview and auto-reload
• Extensible via third-party themes, plugins, and Markdown extensions
• Output can be hosted anywhere static files can be served

Use Cases

• Publishing documentation for software libraries, APIs, and internal tools
• Creating version-controlled docs sites for teams and open source projects
• Generating lightweight help sites that can be deployed to static hosting

MkDocs is a good fit when you want a straightforward documentation workflow with minimal setup, while still having an ecosystem of themes and plugins to extend functionality. Because it produces static output, it is easy to deploy and run on a wide range of infrastructure.

Docmost is a collaborative wiki and documentation platform designed for teams to create, organize, and share internal knowledge. It provides a modern editor with real-time collaboration and structured spaces, making it a practical alternative to tools like Confluence and Notion.

Key Features

• Real-time collaborative editing with live cursors and instant syncing
• Team spaces for organizing documentation by department, project, or domain
• RBAC-style permissions with groups and granular access controls
• Inline comments for discussions directly on pages
• Page history for tracking changes over time
• Built-in diagram support (Draw.io, Excalidraw, Mermaid)
• File attachments and rich embeds from external tools
• Full-text search across content
• Imports from Confluence, Notion, and HTML/Markdown files
• Multilingual UI with support for many translations

Use Cases

• Internal company wiki for policies, runbooks, and engineering docs
• Project documentation hub with permissions per team or space
• Publishing selected pages as a public-facing knowledge base

Limitations and Considerations

• Some functionality is reserved for an Enterprise Edition under a separate license from the AGPL-licensed core

Docmost combines collaborative editing, structured organization, and strong access controls to help teams manage documentation at scale. It is well-suited for organizations that want control over deployment and data while retaining a modern documentation experience.

BookStack is an opinionated documentation and wiki platform for storing and organizing information in a structured way. It focuses on an intuitive editing experience while still providing advanced features like granular permissions, revisions, and integrations.

Key Features

• Book/Chapter/Page content model for structured documentation
• WYSIWYG editor plus an optional Markdown editor with live preview
• Full-text search across books, chapters, and pages
• Direct links to specific paragraphs for precise referencing
• Page revisions and content history
• Role-based access control and permissions
• Integrated authentication options including LDAP, OIDC, and SAML2
• Built-in multi-factor authentication (TOTP and backup codes)
• Built-in diagrams.net drawing support in the editor

Use Cases

• Internal team knowledge base and operational runbooks
• Product or project documentation portal for organizations
• Centralized documentation for self-hosted/homelab services and processes

Limitations and Considerations

• Designed as an opinionated documentation system rather than a highly extensible general-purpose platform

BookStack is a solid choice when you want a clean, structured wiki with strong access control and authentication options. Its focus on usability makes it approachable for non-technical contributors while remaining capable for larger teams.

Docs is an open-source collaborative note-taking, wiki and documentation platform from La Suite numérique. It provides real-time collaborative editing, offline sync, export options and a Django + React/Next.js stack for extensible deployments.

Key Features

• Real-time collaborative editing powered by operational transform / CRDT tooling (Yjs / HocusPocus) for low-latency co-editing.
• Dual editing modes: rich in-line editor (BlockNote) and Markdown support with slash-commands and block types.
• Offline editing with automatic sync when reconnected.
• Export to multiple document formats (.odt, .docx, .pdf) with customizable templates.
• Granular access controls and subpages to organize team knowledge.
• AI-assisted actions (rephrase, summarize, translate, prompt creation) integrated into the editor.
• Production-ready deployment patterns: Kubernetes for production and Docker Compose for local/dev environments.

Use Cases

• Internal knowledge base and team wiki for public sector or enterprise documentation.
• Collaborative authoring of policies, procedures, and technical docs with live multi-author workflows.
• Documentation portals and public-facing docs sites when combined with La Suite deployment patterns.

Limitations and Considerations

• Some advanced editor features (for example certain PDF export capabilities) rely on BlockNote "XL" packages that are GPL-licensed and not MIT-compatible; those features can be disabled to produce an MIT-only build (PUBLISH_AS_MIT).
• Official public instances may require federated or government-specific authentication (example: ProConnect for certain French government instances).

Docs is suitable for organizations that need a self-hosted, extensible collaborative documentation solution with real-time editing and export workflows. The project is community-driven and designed to scale from small teams to government deployments.

Gollum is a simple, Git-powered wiki with a local frontend and support for multiple markup formats. It stores pages in a Git repository, allowing edits via the built-in web interface or any text editor and enabling easy synchronization with GitHub- and GitLab-style wikis.

Key Features

• Git-powered wiki with a built-in web interface and local frontend
• Multi-markup support (Markdown, RDoc) with optional renderers for AsciiDoc, Creole, MediaWiki, Org, and more
• Diagrams and visuals via Mermaid or PlantUML
• BibTeX and citation support
• Annotations using CriticMarkup
• Math rendering with KaTeX or MathJax
• Macros and redirects; RSS feed of latest changes
• Compatibility with GitHub/GitLab wiki workflows
• Docker deployment, Rack compatibility, and a Java WAR option for web servers

Use Cases

• Team knowledge bases and project documentation stored in a Git repository
• Open-source or private wikis that benefit from versioned history and multi-markup content
• Personal knowledge management wikis for notes, reference material, and planning

Limitations and Considerations

• Some markup renderers are optional and require installing additional gems (eg, AsciiDoc, MediaWiki, PlantUML, etc.) to enable those formats

Gollum offers a lightweight, Git-backed wiki with versatile markup support and flexible deployment options, suitable for internal knowledge bases, project documentation, and personal wikis.

TiddlyWiki is a self-contained personal wiki and non-linear web notebook implemented in JavaScript. It can run directly in a web browser as a single HTML file, or be deployed using Node.js for more advanced multi-user and automation scenarios.

Key Features

• Single-file wiki that can be opened and used directly in the browser
• “Tiddlers” (small pages/notes) with powerful linking and transclusion for non-linear writing
• Highly customizable UI and behavior via built-in WikiText, macros, and plugins
• Tagging, search, filtering, and flexible navigation for personal knowledge management
• Node.js-based server mode for hosting, building, and automated publishing workflows

Use Cases

• Personal knowledge management (notes, journals, research, Zettelkasten-style linking)
• Team or personal documentation and lightweight wikis
• Offline-first portable notebooks stored and shared as a single file

TiddlyWiki is well-suited for users who want a durable, hackable wiki that can live as a file or be hosted as a Node.js application. Its plugin ecosystem and deep customizability make it adaptable to many note-taking and documentation workflows.

DokuWiki is an open source wiki engine designed for creating and maintaining documentation and knowledge bases. It stores content in plain text files rather than a database, making it straightforward to deploy, back up, and migrate.

Key Features

• File-based storage (no database required) using plain text pages
• Access control lists (ACL) for fine-grained permissions
• Built-in revision history and page diffs for change tracking
• Full-text search across wiki pages
• Media manager for uploading and organizing files
• Extensible through plugins and templates for customization and integrations

Use Cases

• Team or project documentation portals and internal knowledge bases
• Product manuals and technical documentation with change history
• Lightweight intranet wiki with role-based access control

Limitations and Considerations

• Not designed for real-time collaborative editing in the same way as office-suite style editors
• Large installations may require careful caching and tuning for best search and performance

DokuWiki is a solid choice when you want a dependable wiki with strong permissions and simple operations. Its file-based approach and mature ecosystem make it suitable for both small teams and larger documentation sites.

Raneto is an open-source knowledge base and wiki that serves documentation from static Markdown files. It is designed to be simple and lightweight, with optional edit protection and a built-in web editor, without requiring a database.

Key Features

• File-based content storage using Markdown (easy to version with Git)
• In-browser Markdown editor for creating and updating pages
• Full-text search across page titles and content
• Optional login system to protect editing
• Custom themes and templating for branded documentation sites
• Syntax highlighting for code blocks

Use Cases

• Internal team wiki for engineering and operations runbooks
• Product documentation and user guides maintained as Markdown
• Lightweight documentation portal for small projects without a database

Limitations and Considerations

• File-based storage can be less suitable for large, highly concurrent editing workflows
• Feature set is intentionally minimal compared to full enterprise wiki platforms

Raneto is a good fit for teams who want a straightforward, fast documentation site backed by Markdown files, with web-based editing and search. It works well when you value simplicity, portability, and Git-friendly content management.

EventCatalog is an open source documentation tool that helps teams model and document distributed software architecture. It focuses on making domains, services, events, schemas, and their relationships discoverable and searchable across event-driven and microservice systems.

Key Features

• Markdown- and MDX-driven content for documenting domains, services, messages/events, and schemas
• Generation and synchronization of catalog content from OpenAPI and AsyncAPI inputs
• Schema and architecture primitives designed to capture ownership, dependencies, and relationships
• Diagram support (including versioned diagrams stored with your repository) to document system views and flows
• CLI-driven workflows suitable for local use and CI/CD automation
• Extensible via SDK/API to integrate with custom brokers, registries, or internal systems
• AI-oriented capabilities such as querying structured architecture knowledge and MCP server integration

Use Cases

• Create a searchable source of truth for event-driven architectures across teams and repositories
• Keep architecture documentation aligned with API/spec changes by regenerating catalog content in CI/CD
• Improve onboarding and incident response by making owners, dependencies, and event flows easy to discover

EventCatalog works well for organizations adopting DDD, microservices, and event-driven architecture who want documentation to evolve with their system rather than drift over time. It is especially useful when architecture knowledge is fragmented across multiple tools and teams.

NoteDiscovery is a lightweight, self-hosted knowledge base and note-taking application that stores content as plain Markdown files in folders. It focuses on fast navigation and discovery of notes with a modern web interface, while keeping data under your control.

Key Features

• Markdown editor with live preview and code syntax highlighting
• Wikilinks for connecting notes and an interactive graph view
• YAML frontmatter metadata with tag-based organization and filtering
• Templates with dynamic placeholders for creating reusable note formats
• Mermaid diagram rendering and LaTeX/MathJax equation support
• Favorites, outline (table of contents) panel, and keyboard shortcuts
• Plugin system for extending functionality
• Optional built-in password protection and a REST API
• Responsive UI with Progressive Web App (PWA) support
• Export notes as standalone HTML files

Use Cases

• Personal knowledge base or “second brain” built on local Markdown files
• Developer documentation and technical notes with code blocks, diagrams, and math
• Small team internal wiki with simple sharing and optional authentication

NoteDiscovery is a practical option for users who want a fast, Markdown-first knowledge base with linking and visualization features, without relying on proprietary storage formats. Its file-based approach also makes backups and migrations straightforward.

Gitit is a wiki program written in Haskell. It uses Happstack for the web server and pandoc for markup processing. Pages and uploaded files are stored in a git, darcs, or mercurial repository and may be modified either by using the VCS's command-line tools or through the wiki's web interface.

Key Features

• Written in Haskell; uses Happstack for the web server and pandoc for markup processing.
• Pages and uploaded files stored in a git, darcs, or mercurial repository and editable via VCS or web UI.
• Default markup is Pandoc's extended Markdown; supports reStructuredText, LaTeX, HTML, DocBook, and Org-mode.
• TeX math support via texmath and syntax highlighting via highlighting-kate.
• Plugins enabling dynamic page transformations written in Haskell.
• Categories and Atom feeds.
• Caching for performance.
• A library Network.Gitit to embed a wiki in Happstack apps.

Use Cases

• Host private or public wikis for team documentation with Git-backed storage.
• Create educational wikis or course notes with math and code highlighting.
• Publish lightweight project docs or knowledge bases with a web interface.

Conclusion: Gitit provides a compact, version-controlled wiki workflow with Pandoc-based authoring and pluggable extensions. It is well-suited for personal, team, or small-scale documentation needs.

django-wiki is an extensible wiki application for Django that provides a full-featured knowledge base you can integrate into an existing Django project. It focuses on a strong, familiar web UI while keeping customization and extension within standard Django patterns.

Key Features

• Markdown-based content editing with a built-in web interface
• Built-in revision system for page history and rollback
• Hierarchical page structure for organizing content
• Permissions and access control suitable for teams and organizations
• Pluggable architecture for extending functionality without forking
• Template and theming customization via Django templates and SCSS

Use Cases

• Internal team documentation and engineering knowledge bases
• Product or project documentation embedded into a Django site
• Community or organization wikis with structured permissions

Limitations and Considerations

• Customization typically requires Django knowledge (templates, URLs, plugins)
• Markdown rendering is a core part of the system and is not intended to be swapped out

django-wiki is a solid choice when you want a wiki tightly integrated with Django’s models, authentication, and admin ecosystem. Its extension points and stable APIs make it well-suited for long-lived documentation deployments within Django projects.

An Otter Wiki is a lightweight wiki for collaborative content management. Pages are stored as Markdown files in a Git repository, providing built-in version tracking and a simple, clean editing experience.

Key Features

• Git-backed storage with full changelog, page history, diffs, and revert support
• Markdown editor with highlighting and conveniences (including tables)
• Extended Markdown support (tables, footnotes, alerts, fancy blocks, and Mermaid diagrams)
• File attachments and image pasting/uploading into pages
• User authentication with self-registration and password recovery
• Minimalistic interface with dark-mode support
• Customizable sidebar with menu and/or page index
• Experimental Git HTTP server to clone, pull, and push wiki content

Use Cases

• Team documentation and internal knowledge bases with auditable history
• Personal or small-group notes where Git-based workflows are preferred
• Project wikis that need attachments and easy revision comparison

Limitations and Considerations

• The built-in Git HTTP server is marked experimental and may not fit all production workflows

An Otter Wiki is a solid choice if you want a simple, readable wiki that keeps content in plain files and leverages Git for tracking and recovery. It works well for small teams and projects that value minimal UI and straightforward content management.