Alternatives open source à Obsidian

Tolaria is a markdown knowledge base manager and bidirectional note linking system. It functions as an integrated environment for organizing notes and structured data, utilizing YAML frontmatter and wikilinks to establish relational mappings between documents. The project distinguishes itself by integrating language model capabilities directly into the editor for content generation and analysis. It further combines prose with structured data through a markdown spreadsheet editor that renders CSV-formatted files as interactive grids with formula support and cross-sheet referencing. The platfo

fsnotes is a markdown notes manager and cross-platform markdown editor for macOS and iOS. It functions as a personal knowledge base that organizes plain text and markdown files across folders using tags and bidirectional links. The system provides a secure environment through an encrypted plain text notebook that protects individual notes and folders. It implements Git-based note versioning to track document changes and maintain backups, while relying on external cloud storage services to synchronize files across devices. The application renders mathematical formulas, diagrams, and syntax-hi

Org-roam is an Emacs-based note-taking system that builds a bidirectional network of plain-text notes, functioning as a personal knowledge base manager. It maintains both forward and backlink references in a SQLite database, automatically updated on file save, and uses persistent unique identifiers for notes instead of file paths to enable stable links across renames and moves. The system integrates directly with Emacs through custom interactive commands and hooks that access the database and buffer state, and it generates static graphs of note interconnections using Graphviz to reveal relati

Dendron is a markdown knowledge management system designed for organizing linked files into a hierarchical personal knowledge base. It functions as a git-backed note manager that stores data as plaintext markdown files to ensure data persistence and ownership. The system distinguishes itself through schema-based organization, which applies structural templates and autocomplete hints to maintain consistency across large sets of documents. It also provides bi-directional linking and an interactive graph view to visualize relationships between notes, alongside a static site generator that export

Logseq is a privacy-focused, local-first knowledge base designed for personal information management and networked thought mapping. It functions as a bi-directional graph editor that organizes content into hierarchical, outliner-based structures, allowing users to connect related concepts through automated backlinking and visual relationship mapping. The platform distinguishes itself by maintaining all user data in plain text markdown files stored directly on the local device, ensuring offline availability and long-term portability. It employs a logic-based query engine to perform complex rel

yn is a markdown text editor and knowledge management tool designed as an interactive document canvas. It functions as a networked note-taking system for organizing information via wiki-links, hashtags, and local file repositories, while integrating an AI writing assistant for automated text generation and completion. The project is distinguished by its multi-engine diagramming capabilities, which render text-based syntax into visuals using Mermaid, PlantUML, and ECharts. It employs an extensible plugin framework that allows for the addition of custom UI elements and features through JavaScri

MiaoYan is a local Markdown editor and personal knowledge management tool. It functions as a system for writing and organizing documents stored as local files, supporting the creation of a connected information network through bidirectional links and backlinks. The project includes a specialized tool for converting Markdown documents into slide-based presentations by using specific content separators. It also provides a command-line interface for managing files, allowing users to create, search, and open documents without a graphical file explorer. The editor features a side-by-side live pre

This project is an LLM knowledge base builder and personal knowledge management tool. It is a desktop application designed to transform diverse documents into a persistent, interlinked wiki through LLM analysis and incremental ingestion. The system distinguishes itself with a knowledge graph visualizer that uses community detection algorithms to map relationships between concepts and identify topical clusters. It features a hybrid retrieval system that combines keyword matching, vector embeddings, and graph relevance to locate information. The platform covers a wide range of capabilities inc

Athens is no longer maintainted. Athens was an open-source, collaborative knowledge graph, backed by YC W21

nb is a command-line note manager and personal knowledge management system that organizes plain-text documents and web bookmarks. It functions as a Markdown knowledge base, allowing users to create a structured collection of information through a shell-scripted interface. The system uses Git for versioning and synchronization, tracking full revision history and enabling the sync of notebooks across multiple devices via remote repositories. It provides security for sensitive data through AES-256 or GPG encryption and supports document conversion into various publishing formats using the Pandoc

Trilium is a hierarchical personal knowledge base and digital garden tool designed to organize information into a tree of linked nodes. It functions as a JavaScript programmable wiki and a self-hosted note server, allowing users to maintain a private database of documents synchronized across multiple devices. The platform distinguishes itself through an embedded scripting engine for automating tasks and a REST API that exposes internal data and actions to external tools. Users can further extend the system by modifying the user interface layout and styling through a custom theme engine. The

Blinko is a personal knowledge management system and an LLM-powered knowledge base that enables users to capture and organize thoughts through a bi-directional knowledge graph. It functions as a RAG-enabled note-taking application and a self-hosted Markdown editor, allowing for the creation of permanent documentation and fleeting notes. The project distinguishes itself by integrating retrieval-augmented generation to provide conversational querying and AI-powered analysis of private document libraries. It supports both cloud-based and local AI model integration, enabling users to perform sema

Trilium is a local-first personal knowledge management system designed to store and organize information on a user's own device. It functions as a hierarchical knowledge base where every note acts as both a standalone document and a container for nested children, allowing for complex information relationships and deep categorization. The platform distinguishes itself through a component-based interface that dynamically renders diverse content types, including rich text, diagrams, and executable scripts. All data is persisted within a single relational database file, which supports a versioned

Siyuan is a self-hosted knowledge management platform designed for private note-taking and information organization. It functions as a local-first application that stores all user content as plain text files on the local file system, ensuring data ownership and offline availability. The platform utilizes a block-based document model, which structures information as a tree of independent content blocks to facilitate granular manipulation and bidirectional linking. Users can extend the core functionality through a sandboxed plugin architecture, allowing for the development of custom themes and

Joplin is an open-source, cross-platform note-taking application designed for secure, private knowledge management. It functions as a local-first productivity platform, maintaining a complete relational database on the user's device to ensure offline availability and high-performance data retrieval. The application prioritizes data sovereignty by implementing an end-to-end encryption layer, which secures all information locally with a master key before any synchronization occurs. The platform distinguishes itself through a delta-based synchronization engine that transmits only specific file c

A web only WYSIWYG note taking app that saves notes locally in markdown format. v2: https://staging.app.bangle.io/