opensidian.org's rivals

Open-source, lightweight note-taking application for cross-platform use. It emphasizes security and synchronization across devices. It is designed for personal note-taking with a focus on simplicity and privacy.

A Markdown editor built for creating notes, wikis, projects, reading drafts, and agent files. It's designed to be lightweight and runs locally. Supports various Markdown syntax elements like headings, bold text,…

Creates, searches, and filters local Markdown notes using plain text files without requiring accounts or subscriptions.

A cross-platform, local-first Markdown notebook with optional sync and local artificial intelligence features.

Manages notes, tasks, and calendars using local Org files on desktop and mobile without requiring Emacs.

Local markdown note-taking application utilizing plain files stored on disk with a rich editor.

Organizes notes using Markdown files with native relationships and Git. It supports local agents and direct AI model providers. The source is open source and free.

Creates a personal knowledge base using a knowledge graph that connects notes semantically. It offers semantic search and wiki synthesis features. Users can run it as a desktop app or self-host a server for syncing…

Provides a markdown editor for writing notes that remain on the device and sync over an encrypted channel.

WYSIWYG markdown editor for Mac and iPhone with local-first storage and Obsidian compatibility.

Local Markdown-based note-taking application for macOS featuring visual editing, Kanban boards, and diagrams.

Provides a distraction-free notebook experience for writing. Notes remain stored on the device, requiring no internet or account to access. It supports offline work.

Provides a Markdown workspace for macOS with local-first AI capabilities. It includes features like wikilinks, backlinks, and a graph view. The application is open source and supports offline use.

Provides a markdown-based writing tool featuring local AI assistance, document linking, and databases.

Provides a private writing workspace for note-taking and knowledge management. It supports rich text, Markdown, diagrams, and on-demand AI features within a ~10 MB application.

Provides an open-source, end-to-end encrypted application for private note taking. It ensures user data remains inaccessible to third parties, unlike some other note-taking services.

Enables creation of notes, tasks, databases, and chats with end-to-end encryption. Data is stored on the user's device, offering ownership, security, and privacy. It offers a free starting option.

Adds pressure-aware handwriting blocks to markdown notes that are searchable, graph-indexed, and transcribed by AI.

Provides a lightweight Markdown viewer and editor for Linux and Windows with syntax highlighting and line numbering.

Local-first Markdown notes application for macOS with built-in AI features for writing and linking ideas.

A free, open-source macOS Markdown editor featuring customizable appearance profiles, optional Vim keys, and local writing corrections.

Provides a native Markdown application for Mac, iPad, and iPhone. It includes features like wikilinks, backlinks, a knowledge graph, and export options.

Quickly captures thoughts, notes, reminders, and ideas in plain markdown to clear working memory.

Combines rich-text notes with visual mind maps for organizing thoughts. Ideas can be linked together, and collaboration is possible across desktop and web. It also generates a knowledge graph to visualize connections…

Provides an open-source, self-hosted note-taking application using Markdown.

Open-source knowledge base software offering features like documents, whiteboards, databases, and AI. It provides a local-first, unified workspace for teams. Microsoft Teams and Slack integrations are available.