With over 75,000 GitHub stars and native apps across macOS, Windows, Linux, iOS, and Android, AppFlowy is the most widely adopted open-source alternative to Notion — delivering the same block-based workspace model with full data sovereignty. The Flutter frontend renders natively on every platform while a Rust backend powered by Actix-web and Tokio handles CRDT-based real-time collaboration, ensuring sub-second sync across devices with conflict-free concurrent editing. Relational databases support grid, board, kanban, calendar, and gallery views over the same dataset, with two-way relations, rollups, advanced filters, sorts, and formula calculations that cover the majority of Notion's database workflows. The block editor supports 40+ content types including nested pages, toggles, callouts, code blocks with syntax highlighting, embeds, and slash-command insertion. AI integration connects to OpenAI, Anthropic, or local models via Ollama for writing assistance, summarization, and translation — all without sending data off-premises when using on-prem LLMs. Team spaces with workspace-level and per-page permissions, OAuth and SSO authentication through GoTrue, and S3-compatible object storage via MinIO provide enterprise-grade access control and file management. The self-hosted stack deploys through Docker Compose with PostgreSQL for metadata, Redis for caching and pub/sub, and a dedicated background worker for imports and email notifications. Offline-first architecture ensures the desktop app functions without connectivity, syncing changes when the connection resumes. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.

Folio is a self-hosted team wiki that stores every page as a plain Markdown file in a Git repository you own, while your team writes together in the browser in real time. People work in Reading, Live edit, or Source mode, keep editing offline until the connection returns, and watch changes land in the page history as commits they can restore. Data tables with nine column types, filters, and views sit beside the documents, and forms write submissions straight into those tables without requiring an account. Whiteboards, Mermaid diagrams, and a visual diagram editor cover the pictures, while uploads like PDF, Word, Excel, and PowerPoint files open as previewable pages inside the tree. Confluence spaces import with their trees, images, and whiteboards converted, so a migration keeps its structure instead of flattening into a pile of attachments. AI agents read and write the same pages through an MCP server with 41 tools, authenticated by personal tokens or OAuth 2.1, and the built-in assistant answers questions read-only or makes supervised edits. Administrators control access down to a single page, sign people in with SAML, SCIM, or OpenID Connect, hand out expiring share links, and publish a space as a public read-only website. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.

Doca puts rich text, Markdown, spreadsheets, slides, and an infinite canvas under one login and one permission model, giving individuals and small teams a self-hosted workspace for writing together. Every format supports real-time co-editing with presence, comments, saved history, and manual snapshots, and rich text and Markdown documents can be restored to an earlier version. Documents live in knowledge libraries with tree navigation, invitations, inherited permissions, share links, and trash, while personal files and shared folders sit on local disk or S3-compatible storage. Knowledge books go further: they subscribe to sources, run an editable workflow, keep source evidence, and route results through human review. A personal AI assistant, powered by whichever model you configure, searches authorized documents, reads PDF and Office attachments, edits images, and prepares browser drafts. MCP services let external AI clients such as Codex use those tools under your permissions. Sign in with a password, OIDC, Google, GitHub, WeChat, or QQ, review registrations before they go live, and send webhooks to other systems. A plugin SDK and marketplace add business modules, and a browser extension clips pages into documents. The interface ships in Chinese and English. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.

Team and product documentation on a fast Vue frontend with PostgreSQL storage: Wiki.js is a Node.js wiki engine. Its distinguishing trait is per-page editor choice: authors pick Markdown with live preview, a WYSIWYG visual builder for non-technical writers, or raw HTML, page by page. Native Git synchronization commits every page change to GitHub, GitLab, Bitbucket, Azure DevOps, or any Git remote - bi-directionally, so edits made in the repository flow back into the wiki - giving documentation version-controlled backup for free. Authentication coverage is among the broadest of any self-hosted wiki: local accounts with self-registration, social login via Google, GitHub, Discord, and Slack, and enterprise SSO through LDAP/Active Directory, SAML, CAS, Auth0, Okta, Azure AD, Keycloak, and generic OAuth2/OIDC, with optional MFA. Built-in full-text search runs on PostgreSQL with zero setup, and external engines like Algolia or Solr can substitute. Page history with visual version comparison, granular group-based permissions per path, nested navigation menus, 50+ integration modules, and full localization round it out. AGPLv3-licensed with a 28k-star community.

When an alert fires at 3 a.m., the live chart, the runbook, and the fix are already on one page of Oxynote, a self-hosted technical wiki. The chart is a Live Metrics block that runs its own Prometheus or SQL query and draws a time series, bar chart, or gauge. Several such blocks side by side make a dashboard inside the page. Around it, the editor works like Notion, with checklists, callouts, titled code blocks, Mermaid diagrams, Figma embeds, images, and files. Internal APIs get Stripe-style reference pages with the endpoint, a curl example, and a sample response beside the explanation. Mark a page reviewable and every edit lands in a draft. A block-aware diff shows renamed endpoints, fields, and reworded sentences in one red and green view until a reviewer approves. Freshness hooks watch GitHub files, container images, web pages, or dates, and remind maintainers when something a page depends on changes. Teammates edit together live and see who holds which block. Comments attach to a word, a diagram line, or a whole chart, with replies and an inbox for mentions. The Rubber Duck assistant edits pages and runs block queries with Anthropic, OpenAI, Google, OpenRouter, or a local Ollama model, and MCP lets Claude Code and Codex read and write the docs. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. Apache-2.0 licensed.

Sage Wiki turns a pile of unstructured documents into a fully interlinked, searchable wiki by running them through a five-pass LLM compiler pipeline. Inspired by Andrej Karpathy's vision of LLM-compiled knowledge bases, the pipeline processes source files through diff detection, summarization, concept extraction, image captioning, and cross-reference discovery, with parallel LLM calls and checkpoint/resume for vaults scaling to 100,000+ documents. The typed ontology graph stores entities and relations with BFS traversal, configurable relation types, multilingual synonyms, and a promotion/demotion lifecycle backed by grounding verification and consensus scoring. Multi-format ingestion handles Markdown, PDF, Word, Excel, PowerPoint, EPUB, email, CSV, images, and code files without manual tagging. LLM provider support spans Anthropic, OpenAI, Gemini, Ollama, and any OpenAI-compatible API, with per-pass model routing enabling cost optimization by assigning cheaper models to simpler tasks. The built-in MCP server exposes 17 tools over SSE transport for integration with Claude, Cursor, and any MCP-compatible agent, while native Obsidian vault overlay ensures existing note workflows remain undisrupted. Team deployment supports Git-synced shared wikis, centralized server access, and hub federation across multiple projects. Ships as a single Go binary with Docker Compose multi-arch images serving the web UI on port 3333. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.

OpenKnowledge turns a folder of markdown files into a workspace where you and an AI agent can write in the same document. The editor feels like a Notion page but saves plain markdown, with a visual mode, a markdown mode, a properties panel for titles and tags, and a file navigator with search and tabs. Ask Claude, Codex, or another harness to draft a recap, and the edit appears beside the chat as you watch. Select any passage and leave a comment, then send all open comments to the agent in one message. A timeline panel lists every change with a before and after diff, so an agent's rewrite is easy to review and undo. Skills Studio covers writing, browsing, and installing agent skills, and it can link one skills folder across Claude, Cursor, Codex, and others. Starter packs set up LLM wikis and second brains, and a graph view shows how wiki links connect pages. Git sync shares a knowledge base with teammates, and rich components like callouts, tabs, and diagrams make specs readable. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. GPL-3.0 licensed.

Documentation deserves better than a database nobody wants to maintain. Typemill is an open-source flat-file CMS for informational websites, manuals, knowledge bases, and handbooks: content lives as Markdown files in folders, so a site can be copied, versioned, backed up, and moved with ordinary file tools and no database server anywhere in the stack. Authors get a visual block editor for nontechnical writing and a raw Markdown editor when precision matters, with a navigation tree, drag-and-drop structure, media library, page metadata, and publish states in one workspace. The same source then publishes three ways: as a themed website, as a printable PDF manual, or as an EPUB eBook through the eBook studio, making single-source publishing real for teams tired of maintaining docs, PDFs, and handbooks as three diverging copies. Themes are built from HTML and Twig; plugins add search, analytics, diagrams, math, and integrations; and an optional AI assistant interface connects writing help to the editor. User management, restricted pages, redirects, and a REST API cover the operational side, and the whole application is small enough to run comfortably on modest shared-style hosting or a tiny server while still feeling instant. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.

Flowplan puts your team's documents, databases, whiteboards, handwriting notebooks, and daily journal into one self-hosted page tree, so the work lives in a single place you control instead of five subscriptions. Write in a block editor that stays out of the way, and when a number appears mid-sentence, type the calculation and press Tab to drop in the result, or graph functions and vectors in 2D and 3D without leaving the page. The same records can be viewed as a table, board, calendar, timeline, gallery, list, feed, chart, form, or sprint board, with relations, rollups, and formulas tying them together, and projects get ticket numbers, sprints with burndown, and automations on top. Brainstorm on whiteboards with sticky notes, mind maps, and voting; keep a journal page per day with templates and an optional PIN lock; and write by hand in notebooks with lined, grid, or Cornell paper, annotate PDFs, and sketch inside documents with a pressure-sensitive pen. Teammates edit together with live cursors, comment in inline threads, and share single pages with guests through password-protected, expiring links, while permissions reach down to a single record. AI is off until an admin enables it, per feature and per person, and it can run entirely on your own hardware or answer questions about the workspace with links to its sources. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.

Every page in a DokuWiki knowledge base is just a plain text file on disk, so a team wiki can run for years on modest hardware with no database to feed, ever. Writers edit pages in a clean, readable syntax, fix just one section of a long document at a time, and lean on the toolbar, breadcrumbs, automatic tables of contents, and conflict locking to keep collaboration painless. Every change is kept as a revision with colored side-by-side diffs, recent-changes feeds go out over RSS, and an index-based full-text search finds content across thousands of pages in milliseconds. Namespaces organize content into a browsable tree, while built-in access control lists decide per page or per branch who may read, edit, upload, or administer, with logins checked against LDAP and other backends. Media uploads embed straight into pages, configuration happens in the browser, and the whole installation backs up by copying a folder, which makes migrations and disaster recovery almost boringly simple. When the basics stop being enough, more than twelve hundred community plugins and a hundred templates add galleries, multilingual structures, diagrams, and data tables without changing how the wiki itself works. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. GPL-2.0 licensed.

One executive voice, backed by nine specialist agents, answers business questions from your own documents instead of generic management advice. Ask if a product line should be built or deferred and the reply cites your financial snapshot, roadmap, and legal notes, then lists the numbers behind the call and the next steps. The Agent Council covers strategy, finance, people, legal, operations, marketing, product, sales, and board communications, and each agent accepts its own instructions and model. A company profile stores mission, target customer, and competitors. Departments and Goals track owners, weekly check-ins, and at-risk or off-track status. Knowledge accepts PDF, Word, Excel, CSV, Markdown, and text files, and can sync from Google Drive, OneDrive, Confluence, or Notion. Memory records decisions and what the company has learned, and a built-in scheduler surfaces follow-ups and alerts on its own. The same executive answers in Slack, Discord, Telegram, Google Chat, Gmail, Outlook, or any MCP client, with spend approval thresholds that govern how it works with people. Founders get a chief of staff, small teams a fractional advisor, and board prep a head start before the next investor update. Demo companies are bundled for a quick tour. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. Apache-2.0 licensed.

Alexandrie provides a structured knowledge base with an extended Markdown editor, granular per-document permissions, and offline editing through its progressive web app. The CodeMirror 6 editor goes well beyond standard Markdown with colored containers, academic callout blocks, KaTeX math expressions, syntax-highlighted code blocks, footnotes, interactive checkboxes, cards, panels, and a custom snippet system with import and export. Full-text search via the Ctrl+K command center returns instant results with content snippets and relevance ranking across all workspaces. Five permission levels covering None, Read, Write, Admin, and Owner apply per document and per user, while OIDC single sign-on integrates with Google, GitHub, Microsoft, Discord, and any OpenID Connect provider. Documents organize into a hierarchical tree of workspaces, categories, and nested entries with tags, bookmarks, pinned notes, and custom icons. Integrated Kanban boards handle task management within each workspace without switching applications. The PWA installs on any device for full offline editing with seamless sync when connectivity returns. Voice-to-text dictation captures notes hands-free, and one-click ZIP backup exports all documents, files, and settings as a portable archive. Over 2,000 GitHub stars and 41 releases back the project. The Docker Compose stack orchestrates the Nuxt 4 frontend, Go Gin backend, MySQL 8 database, and S3-compatible RustFS object storage. Running on a VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.

Engineering teams and technical writers maintain operational runbooks, system documentation, and knowledge bases using LeafWiki, an open-source self-hosted wiki that stores page contents directly as human-readable Markdown files on the local filesystem. Authors can compose documentation through a dual-pane editor equipped with live HTML preview, keyboard navigation, autocomplete for internal links, and native rendering for Mermaid diagrams, KaTeX mathematical formulas, and collapsible callout containers. The navigational tree organizes complex documentation into explicit directory hierarchies and custom drag-and-drop page sequences tracked in lightweight configuration files rather than arbitrary alphabetical lists. An integrated SQLite engine indexes page content and custom taxonomy tags for fast full-text searches, automatic incoming backlink tracking, and automated broken link detection. System operators can deploy the single-binary application without external database servers or runtime dependencies, backing up the entire repository by copying the data directory. Administrators can provision granular user roles, configure reverse proxy header authentication for single sign-on gateways, and manage read-only API access keys for automated documentation scripts and continuous integration pipelines. Public viewers can browse technical notes without authentication or switch between dark and light high-contrast themes. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.

Confluence and Notion both want your team's documentation in their cloud; Docmost, an open-source collaborative wiki platform, keeps it on your server. The centerpiece is a Notion-style block editor with CRDT-based real-time collaboration: multiple people edit the same page simultaneously and changes merge without conflicts or overwrites. Content lives in spaces - per team, project, or department - with nested page trees, role-based permissions, groups, inline comments, page history with restore, and full-text search across everything. The editor covers tables, code blocks, callouts, KaTeX math, and file attachments, and diagramming is built in rather than bolted on: Mermaid, Draw.io, and Excalidraw all render inside pages, alongside embeds for Airtable, Loom, Miro, and more. Migration paths include Notion, Markdown, HTML, and ZIP archive imports (Confluence, PDF, and DOCX importers ship in the Enterprise edition, along with SSO via SAML/OIDC/LDAP and MFA). The stack is TypeScript with PostgreSQL and Redis, deploys via Docker Compose, runs in air-gapped environments with no external dependencies, and is translated into 10+ languages. The AGPL-3.0 community edition carries no per-seat fees; the project has passed 20,000 GitHub stars since its 2024 launch.

Most wikis die of flat page-and-tag sprawl; BookStack's defining decision is enforced structure - an MIT-licensed PHP/Laravel platform (over MySQL) where content lives in a hierarchy of shelves, books, chapters, and pages, the way a physical library works. A shelf maps to a department, a book to "Engineering Runbooks," a chapter to "Database Procedures," a page to the actual document. That opinionation removes the "where does this go?" friction and keeps knowledge bases tidy as they grow. Editing works both ways: a clean WYSIWYG editor for most users, a Markdown editor with live preview for those who prefer it - switchable per page. Full-text search spans all books or scopes to one, with direct links to individual paragraphs, and include tags let you embed one page's content inside another so shared blocks update everywhere at once. Every edit creates a diffable, revertible revision. Page templates standardize recurring formats, tags add cross-cutting categorization, and built-in diagrams.net integration draws architecture diagrams in place. Authentication covers email/password plus OIDC, SAML2, LDAP, and social login; a full role and permission system locks content down per shelf, book, or page. Pages and books export to PDF, HTML, plain text, and Markdown, a REST API automates content, and the whole thing runs happily on the cheapest VPS you can find.

In seven wizard steps, PandaWiki sets up a product docs, manual, FAQ, or blog site whose built-in AI answers visitors using only your own content. Those visitors can chat with an assistant that cites its sources and accepts image questions, or switch to a docs-only search that lists ranked pages with summaries. Publishing stays under control: each document has three switches, visible in navigation, reachable by URL, and answerable by AI, and nothing appears or gets learned until it is published. Authors write in a Markdown and HTML editor, or import from URLs, RSS and Atom feeds, sitemaps, offline .txt, .md, .xlsx, .docx, and .pdf files, Notion, Yuque, SiYuan, Wiki.js, Feishu, Confluence, and DingTalk. Pages export to Word, PDF, or Markdown. The wizard covers models, domain, HTTP or HTTPS ports, import, publishing, answer testing, and page decoration. One knowledge base can also feed a web widget and DingTalk, Feishu, WeCom, and Discord bots. Administrators get a dashboard of visits, questions, visitor regions, hot documents, and referring domains. Chat models come from Baizhi Cloud, DeepSeek, OpenAI, or Ollama, while vector and reranking models are built in. The open-source edition covers one wiki site, 300 documents, and one admin, and its console and documentation are in Chinese. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.

Frappe Wiki is an open-source wiki that turns product guides, help centers, and company handbooks into clean, searchable documentation your whole team enjoys writing. Each space is its own wiki with a separate URL, logo, and access rules, public or limited to chosen roles. The rich text editor handles headings, tables, task lists, code blocks, callouts, images with dark-mode variants, Mermaid diagrams, PDFs, and videos, and stores everything as Markdown. Edits collect in a change request that works like a branch: a reviewer reads a side-by-side diff, then approves, asks for changes, or rejects it, and readers can propose changes too. Every merge adds a version to the page history. Published pages show a page tree, a table of contents, search, PDF download, per-page feedback, and light or dark mode. Analytics report page views, new visitors, top pages, and referrers for the whole wiki, one space, or one page. GitHub Sync keeps a space in step with a folder of Markdown files in a repository. Each page gets meta tags and a generated social card, and the site serves a sitemap, a Markdown copy of every page, and an llms.txt index for AI tools. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.

Achieving 98.4% Recall@5 on LongMemEval-S without a reranker, AKB is the agent-native knowledge infrastructure giving Claude Code, Cursor, Windsurf, and any MCP-aware agent persistent organizational memory — a drop-in replacement for Confluence or Notion where AI agents read and write directly rather than scraping human-formatted pages. Documents are stored as Markdown with YAML frontmatter in Git bare repositories (full version history, branching, diff), while PostgreSQL 16 serves as source of truth for chunk text, metadata, and BM25 vocabulary, with dense embeddings handled by a pluggable vector store (pgvector default, Qdrant optional, or managed Seahorse). Agents interact through 20+ MCP tools — akb_put, akb_search, akb_browse, akb_relations, akb_sql, akb_edit, akb_history — performing hybrid dense plus BM25 search fused via Reciprocal Rank Fusion in one call. The URI graph (depends_on, related_to, implements relations) lets agents traverse knowledge connections without external graph databases. Multi-tenant vault isolation is enforced at the PostgreSQL ACL level with per-user roles and SET LOCAL ROLE for SQL sandboxing. Event fanout streams structured events to Redis Streams for external consumers (synthesis bots, digest agents, audit trails), and a hash-chained append-only audit log integrates with enterprise SIEMs. Ships with agent plugins for Claude Code and Codex (session capture, wiki ingest, lifecycle hooks), Kubernetes kustomize manifests, and Open Knowledge Format export. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. BSL 1.1 licensed (free under 100 seats, auto-converts to Apache 2.0 after four years).